Complete reqork of how slider training works and optimized it to hell. Can run entire algorythm in 1 batch now with less VRAM consumption than a quarter of it used to take

README.md

@@ -170,18 +170,27 @@ Just went in and out. It is much worse on smaller faces than shown here.
 
 ## Change Log
 
+#### 2023-08-05
+ - Huge memory rework and slider rework. Slider training is better thant ever with no more
+ram spikes. I also made it so all 4 parts of the slider algorythm run in one batch so they share gradient
+accumulation. This makes it much faster and more stable. 
+ - Updated the example config to be something more practical and more updated to current methods. It is now
+a detail slide and shows how to train one without a subject. 512x512 slider training for 1.5 should work on 
+6GB gpu now. Will test soon to verify. 
+
+
 #### 2021-10-20
  - Windows support bug fixes
  - Extensions! Added functionality to make and share custom extensions for training, merging, whatever.
 check out the example in the `extensions` folder. Read more about that above.
  - Model Merging, provided via the example extension.
 
-#### 2021-08-03
+#### 2023-08-03
 Another big refactor to make SD more modular.
 
 Made batch image generation script
 
-#### 2021-08-01
+#### 2023-08-01
 Major changes and update. New LoRA rescale tool, look above for details. Added better metadata so
 Automatic1111 knows what the base model is. Added some experiments and a ton of updates. This thing is still unstable
 at the moment, so hopefully there are not breaking changes. 
@@ -199,7 +208,7 @@ encoders to the model as well as a few more entirely separate diffusion networks
 training without every experimental new paper added to it. The KISS principal. 
 
 
-#### 2021-07-30
+#### 2023-07-30
 Added "anchors" to the slider trainer. This allows you to set a prompt that will be used as a 
 regularizer. You can set the network multiplier to force spread consistency at high weights
 

config/examples/train_slider.example.yml

@@ -7,7 +7,7 @@ job: train
 config:
   # the name will be used to create a folder in the output folder
   # it will also replace any [name] token in the rest of this config
-  name: pet_slider_v1
+  name: detail_slider_v1
   # folder will be created with name above in folder below
   # it can be relative to the project root or absolute
   training_folder: "output/LoRA"
@@ -24,7 +24,7 @@ config:
         type: "lierla"
         # rank / dim of the network. Bigger is not always better. Especially for sliders. 8 is good
         rank: 8
-        alpha: 1.0 # just leave it
+        alpha: 4 # Do about half of rank
 
       # training config
       train:
@@ -33,7 +33,7 @@ config:
         # how many steps to train. More is not always better. I rarely go over 1000
         steps: 500
         # I have had good results with 4e-4 to 1e-4 at 500 steps
-        lr: 1e-4
+        lr: 2e-4
         # enables gradient checkpoint, saves vram, leave it on
         gradient_checkpointing: true
         # train the unet. I recommend leaving this true
@@ -43,6 +43,7 @@ config:
         # not the description of it (text encoder)
         train_text_encoder: false
 
+
         # just leave unless you know what you are doing
         # also supports "dadaptation" but set lr to 1 if you use that,
         # but it learns too fast and I don't recommend it
@@ -53,6 +54,7 @@ config:
         # while training. Just leave it
         max_denoising_steps: 40
         # works great at 1. I do 1 even with my 4090.
+        # higher may not work right with newer single batch stacking code anyway
         batch_size: 1
         # bf16 works best if your GPU supports it (modern)
         dtype: bf16  # fp32, bf16, fp16
@@ -69,12 +71,17 @@ config:
         name_or_path: "runwayml/stable-diffusion-v1-5"
         is_v2: false  # for v2 models
         is_v_pred: false # for v-prediction models (most v2 models)
+        # has some issues with the dual text encoder and the way we train sliders
+        # it works bit weights need to probably be higher to see it.
         is_xl: false  # for SDXL models
 
       # saving config
       save:
         dtype: float16 # precision to save. I recommend float16
         save_every: 50 # save every this many steps
+        # this will remove step counts more than this number
+        # allows you to save more often in case of a crash without filling up your drive
+        max_step_saves_to_keep: 2
 
       # sampling config
       sample:
@@ -92,21 +99,22 @@ config:
         #  --m [number]  # network multiplier. LoRA weight. -3 for the negative slide, 3 for the positive
         #      slide are good tests. will inherit sample.network_multiplier if not set
         #  --n [string]  # negative prompt, will inherit sample.neg if not set
-
         # Only 75 tokens allowed currently
-        prompts:  # our example is an animal slider, neg: dog, pos: cat
-          - "a golden retriever --m -5"
-          - "a golden retriever --m -3"
-          - "a golden retriever --m 3"
-          - "a golden retriever --m 5"
-          - "calico cat --m -5"
-          - "calico cat --m -3"
-          - "calico cat --m 3"
-          - "calico cat --m 5"
-          - "an elephant --m -5"
-          - "an elephant --m -3"
-          - "an elephant --m 3"
-          - "an elephant --m 5"
+        # I like to do a wide positive and negative spread so I can see a good range and stop
+        # early if the network is braking down
+        prompts:
+          - "a woman in a coffee shop, black hat, blonde hair, blue jacket --m -5"
+          - "a woman in a coffee shop, black hat, blonde hair, blue jacket --m -3"
+          - "a woman in a coffee shop, black hat, blonde hair, blue jacket --m 3"
+          - "a woman in a coffee shop, black hat, blonde hair, blue jacket --m 5"
+          - "a golden retriever sitting on a leather couch, --m -5"
+          - "a golden retriever sitting on a leather couch --m -3"
+          - "a golden retriever sitting on a leather couch --m 3"
+          - "a golden retriever sitting on a leather couch --m 5"
+          - "a man with a beard and red flannel shirt, wearing vr goggles, walking into traffic --m -5"
+          - "a man with a beard and red flannel shirt, wearing vr goggles, walking into traffic --m -3"
+          - "a man with a beard and red flannel shirt, wearing vr goggles, walking into traffic --m 3"
+          - "a man with a beard and red flannel shirt, wearing vr goggles, walking into traffic --m 5"
         # negative prompt used on all prompts above as default if they don't have one
         neg: "cartoon, fake, drawing, illustration, cgi, animated, anime, monochrome"
         # seed for sampling. 42 is the answer for everything
@@ -135,11 +143,16 @@ config:
         # resolutions to train on. [ width, height ]. This is less important for sliders
         # as we are not teaching the model anything it doesn't already know
         # but must be a size it understands [ 512, 512 ] for sd_v1.5  and [ 768, 768 ] for sd_v2.1
+        # and [ 1024, 1024 ] for sd_xl
         # you can do as many as you want here
         resolutions:
           - [ 512, 512 ]
 #          - [ 512, 768 ]
 #          - [ 768, 768 ]
+        # slider training uses 4 combined steps for a single round. This will do it in one gradient
+        # step. It is highly optimized and shouldn't take anymore vram than doing without it,
+        # since we break down batches for gradient accumulation now. so just leave it on.
+        batch_full_slide: true
         # These are the concepts to train on. You can do as many as you want here,
         # but they can conflict outweigh each other. Other than experimenting, I recommend
         # just doing one for good results
@@ -150,7 +163,9 @@ config:
             # a keyword necessarily but what the model understands the concept to represent.
             # "person" will affect men, women, children, etc but will not affect cats, dogs, etc
             # it is the models base general understanding of the concept and everything it represents
-          - target_class: "animal"
+            # you can leave it blank to affect everything. In this example, we are adjusting
+            # detail, so we will leave it blank to affect everything
+          - target_class: ""
             # positive is the prompt for the positive side of the slider.
             # It is the concept that will be excited and amplified in the model when we slide the slider
             # to the positive side and forgotten / inverted when we slide
@@ -158,33 +173,44 @@ config:
             # the prompt. You want it to be the extreme of what you want to train on. For example,
             # if you want to train on fat people, you would use "an extremely fat, morbidly obese person"
             # as the prompt. Not just "fat person"
-            positive: "cat"
+            # max 75 tokens for now
+            positive: "high detail, 8k, intricate, detailed, high resolution, high res, high quality"
             # negative is the prompt for the negative side of the slider and works the same as positive
             # it does not necessarily work the same as a negative prompt when generating images
-            negative: "dog"
+            # these need to be polar opposites.
+            # max 76 tokens for now
+            negative: "blurry, boring, fuzzy, low detail, low resolution, low res, low quality"
             # the loss for this target is multiplied by this number.
             # if you are doing more than one target it may be good to set less important ones
-            # to a lower number like 0.1 so they dont outweigh the primary target
+            # to a lower number like 0.1 so they don't outweigh the primary target
             weight: 1.0
 
-        # anchors are prompts that wer try to hold on to while training the slider
-        # you want these to generate an image very similar to the target_class
-        # without directly overlapping it. For example, if you are training on a person smiling,
-        # you would use "a person with a face mask" as an anchor. It is a person, the image is the same
-        # regardless if they are smiling or not
-        anchors:
-          # only positive prompt for now
-          - prompt: "a woman"
-            neg_prompt: "animal"
-            # the multiplier applied to the LoRA when this is run.
-            # higher will give it more weight but also help keep the lora from collapsing
-            multiplier: 8.0
-          - prompt: "a man"
-            neg_prompt: "animal"
-            multiplier: 8.0
-          - prompt: "a person"
-            neg_prompt: "animal"
-            multiplier: 8.0
+
+        # anchors are prompts that we will try to hold on to while training the slider
+        # these are NOT necessary and can prevent the slider from converging if not done right
+        # leave them off if you are having issues, but they can help lock the network
+        # on certain concepts to help prevent catastrophic forgetting
+        # you want these to generate an image that is not your target_class, but close to it
+        # is fine as long as it does not directly overlap it.
+        # For example, if you are training on a person smiling,
+        # you could use "a person with a face mask" as an anchor. It is a person, the image is the same
+        # regardless if they are smiling or not, however, the closer the concept is to the target_class
+        # the less the multiplier needs to be. Keep multipliers less than 1.0 for anchors usually
+        # for close concepts, you want to be closer to 0.1 or 0.2
+        # these will slow down training. I am leaving them off for the demo
+
+#        anchors:
+#          - prompt: "a woman"
+#            neg_prompt: "animal"
+#            # the multiplier applied to the LoRA when this is run.
+#            # higher will give it more weight but also help keep the lora from collapsing
+#            multiplier: 1.0
+#          - prompt: "a man"
+#            neg_prompt: "animal"
+#            multiplier: 1.0
+#          - prompt: "a person"
+#            neg_prompt: "animal"
+#            multiplier: 1.0
 
 # You can put any information you want here, and it will be saved in the model.
 # The below is an example, but you can put your grocery list in it if you want.

info.py

@@ -3,6 +3,6 @@ from collections import OrderedDict
 v = OrderedDict()
 v["name"] = "ai-toolkit"
 v["repo"] = "https://github.com/ostris/ai-toolkit"
-v["version"] = "0.0.3"
+v["version"] = "0.0.4"
 
 software_meta = v

jobs/process/BaseSDTrainProcess.py

@@ -242,6 +242,12 @@ class BaseSDTrainProcess(BaseTrainProcess):
             unet.enable_xformers_memory_efficient_attention()
         if self.train_config.gradient_checkpointing:
             unet.enable_gradient_checkpointing()
+            # if isinstance(text_encoder, list):
+            #     for te in text_encoder:
+            #         te.enable_gradient_checkpointing()
+            # else:
+            #     text_encoder.enable_gradient_checkpointing()
+
         unet.to(self.device_torch, dtype=dtype)
         unet.requires_grad_(False)
         unet.eval()
@@ -281,6 +287,9 @@ class BaseSDTrainProcess(BaseTrainProcess):
                 default_lr=self.train_config.lr
             )
 
+            if self.train_config.gradient_checkpointing:
+                self.network.enable_gradient_checkpointing()
+
             latest_save_path = self.get_latest_save_path()
             if latest_save_path is not None:
                 self.print(f"#### IMPORTANT RESUMING FROM {latest_save_path} ####")

jobs/process/TrainSliderProcess.py

@@ -3,12 +3,14 @@
 import random
 from collections import OrderedDict
 import os
-from typing import Optional
+from typing import Optional, Union
 
 from safetensors.torch import save_file, load_file
+import torch.utils.checkpoint as cp
 from tqdm import tqdm
 
 from toolkit.config_modules import SliderConfig
+from toolkit.layers import CheckpointGradients
 from toolkit.paths import REPOS_ROOT
 import sys
 
@@ -16,88 +18,21 @@ from toolkit.stable_diffusion_model import PromptEmbeds
 from toolkit.train_tools import get_torch_dtype
 import gc
 from toolkit import train_tools
+from toolkit.prompt_utils import \
+    EncodedPromptPair, ACTION_TYPES_SLIDER, \
+    EncodedAnchor, concat_prompt_pairs, \
+    concat_anchors, PromptEmbedsCache, encode_prompts_to_cache, build_prompt_pair_batch_from_cache, split_anchors, \
+    split_prompt_pairs
 
 import torch
 from .BaseSDTrainProcess import BaseSDTrainProcess
 
 
-class ACTION_TYPES_SLIDER:
-    ERASE_NEGATIVE = 0
-    ENHANCE_NEGATIVE = 1
-
-
 def flush():
     torch.cuda.empty_cache()
     gc.collect()
 
 
-class EncodedPromptPair:
-    def __init__(
-            self,
-            target_class,
-            target_class_with_neutral,
-            positive_target,
-            positive_target_with_neutral,
-            negative_target,
-            negative_target_with_neutral,
-            neutral,
-            empty_prompt,
-            both_targets,
-            action=ACTION_TYPES_SLIDER.ERASE_NEGATIVE,
-            multiplier=1.0,
-            weight=1.0
-    ):
-        self.target_class = target_class
-        self.target_class_with_neutral = target_class_with_neutral
-        self.positive_target = positive_target
-        self.positive_target_with_neutral = positive_target_with_neutral
-        self.negative_target = negative_target
-        self.negative_target_with_neutral = negative_target_with_neutral
-        self.neutral = neutral
-        self.empty_prompt = empty_prompt
-        self.both_targets = both_targets
-        self.multiplier = multiplier
-        self.action: int = action
-        self.weight = weight
-
-    # simulate torch to for tensors
-    def to(self, *args, **kwargs):
-        self.target_class = self.target_class.to(*args, **kwargs)
-        self.positive_target = self.positive_target.to(*args, **kwargs)
-        self.positive_target_with_neutral = self.positive_target_with_neutral.to(*args, **kwargs)
-        self.negative_target = self.negative_target.to(*args, **kwargs)
-        self.negative_target_with_neutral = self.negative_target_with_neutral.to(*args, **kwargs)
-        self.neutral = self.neutral.to(*args, **kwargs)
-        self.empty_prompt = self.empty_prompt.to(*args, **kwargs)
-        self.both_targets = self.both_targets.to(*args, **kwargs)
-        return self
-
-
-class PromptEmbedsCache:
-    prompts: dict[str, PromptEmbeds] = {}
-
-    def __setitem__(self, __name: str, __value: PromptEmbeds) -> None:
-        self.prompts[__name] = __value
-
-    def __getitem__(self, __name: str) -> Optional[PromptEmbeds]:
-        if __name in self.prompts:
-            return self.prompts[__name]
-        else:
-            return None
-
-
-class EncodedAnchor:
-    def __init__(
-            self,
-            prompt,
-            neg_prompt,
-            multiplier=1.0
-    ):
-        self.prompt = prompt
-        self.neg_prompt = neg_prompt
-        self.multiplier = multiplier
-
-
 class TrainSliderProcess(BaseSDTrainProcess):
     def __init__(self, process_id: int, job, config: OrderedDict):
         super().__init__(process_id, job, config)
@@ -110,6 +45,8 @@ class TrainSliderProcess(BaseSDTrainProcess):
         self.prompt_cache = PromptEmbedsCache()
         self.prompt_pairs: list[EncodedPromptPair] = []
         self.anchor_pairs: list[EncodedAnchor] = []
+        # keep track of prompt chunk size
+        self.prompt_chunk_size = 1
 
     def before_model_load(self):
         pass
@@ -137,36 +74,12 @@ class TrainSliderProcess(BaseSDTrainProcess):
 
         # get encoded latents for our prompts
         with torch.no_grad():
-            if self.slider_config.prompt_tensors is not None:
-                # check to see if it exists
-                if os.path.exists(self.slider_config.prompt_tensors):
-                    # load it.
-                    self.print(f"Loading prompt tensors from {self.slider_config.prompt_tensors}")
-                    prompt_tensors = load_file(self.slider_config.prompt_tensors, device='cpu')
-                    # add them to the cache
-                    for prompt_txt, prompt_tensor in tqdm(prompt_tensors.items(), desc="Loading prompts", leave=False):
-                        if prompt_txt.startswith("te:"):
-                            prompt = prompt_txt[3:]
-                            # text_embeds
-                            text_embeds = prompt_tensor
-                            pooled_embeds = None
-                            # find pool embeds
-                            if f"pe:{prompt}" in prompt_tensors:
-                                pooled_embeds = prompt_tensors[f"pe:{prompt}"]
-
-                            # make it
-                            prompt_embeds = PromptEmbeds([text_embeds, pooled_embeds])
-                            cache[prompt] = prompt_embeds.to(device='cpu', dtype=torch.float32)
-
-            if len(cache.prompts) == 0:
-                print("Prompt tensors not found. Encoding prompts..")
-                empty_prompt = ""
-                # encode empty_prompt
-                cache[empty_prompt] = self.sd.encode_prompt(empty_prompt)
-
+            # list of neutrals. Can come from file or be empty
             neutral_list = self.prompt_txt_list if self.prompt_txt_list is not None else [""]
 
-                for neutral in tqdm(neutral_list, desc="Encoding prompts", leave=False):
+            # build the prompts to cache
+            prompts_to_cache = []
+            for neutral in neutral_list:
                 for target in self.slider_config.targets:
                     prompt_list = [
                         f"{target.target_class}",  # target_class
@@ -177,123 +90,41 @@ class TrainSliderProcess(BaseSDTrainProcess):
                         f"{target.negative} {neutral}",  # negative_target with neutral
                         f"{neutral}",  # neutral
                         f"{target.positive} {target.negative}",  # both targets
-                            f"{target.negative} {target.positive}",  # both targets
+                        f"{target.negative} {target.positive}",  # both targets reverse
                     ]
-                        for p in prompt_list:
-                            # build the cache
-                            if cache[p] is None:
-                                cache[p] = self.sd.encode_prompt(p).to(device="cpu", dtype=torch.float32)
+                    prompts_to_cache += prompt_list
 
-                    erase_negative = len(target.positive.strip()) == 0
-                    enhance_positive = len(target.negative.strip()) == 0
+            # remove duplicates
+            prompts_to_cache = list(dict.fromkeys(prompts_to_cache))
 
-                    both = not erase_negative and not enhance_positive
-
-                    if erase_negative and enhance_positive:
-                        raise ValueError("target must have at least one of positive or negative or both")
-                    # for slider we need to have an enhancer, an eraser, and then
-                    # an inverse with negative weights to balance the network
-                    # if we don't do this, we will get different contrast and focus.
-                    # we only perform actions of enhancing and erasing on the negative
-                    # todo work on way to do all of this in one shot
-                if self.slider_config.prompt_tensors:
-                    print(f"Saving prompt tensors to {self.slider_config.prompt_tensors}")
-                    state_dict = {}
-                    for prompt_txt, prompt_embeds in cache.prompts.items():
-                        state_dict[f"te:{prompt_txt}"] = prompt_embeds.text_embeds.to("cpu",
-                                                                                      dtype=get_torch_dtype('fp16'))
-                        if prompt_embeds.pooled_embeds is not None:
-                            state_dict[f"pe:{prompt_txt}"] = prompt_embeds.pooled_embeds.to("cpu",
-                                                                                            dtype=get_torch_dtype(
-                                                                                                'fp16'))
-                    save_file(state_dict, self.slider_config.prompt_tensors)
+            # encode them
+            cache = encode_prompts_to_cache(
+                prompt_list=prompts_to_cache,
+                sd=self.sd,
+                cache=cache,
+                prompt_tensor_file=self.slider_config.prompt_tensors
+            )
 
             prompt_pairs = []
-            for neutral in tqdm(neutral_list, desc="Encoding prompts", leave=False):
+            prompt_batches = []
+            for neutral in tqdm(neutral_list, desc="Building Prompt Pairs", leave=False):
                 for target in self.slider_config.targets:
-                    erase_negative = len(target.positive.strip()) == 0
-                    enhance_positive = len(target.negative.strip()) == 0
+                    prompt_pair_batch = build_prompt_pair_batch_from_cache(
+                        cache=cache,
+                        target=target,
+                        neutral=neutral,
 
-                    both = not erase_negative and not enhance_positive
-
-                    if both or erase_negative:
-                        print("Encoding erase negative")
-                        prompt_pairs += [
-                            # erase standard
-                            EncodedPromptPair(
-                                target_class=cache[target.target_class],
-                                target_class_with_neutral=cache[f"{target.target_class} {neutral}"],
-                                positive_target=cache[f"{target.positive}"],
-                                positive_target_with_neutral=cache[f"{target.positive} {neutral}"],
-                                negative_target=cache[f"{target.negative}"],
-                                negative_target_with_neutral=cache[f"{target.negative} {neutral}"],
-                                neutral=cache[neutral],
-                                action=ACTION_TYPES_SLIDER.ERASE_NEGATIVE,
-                                multiplier=target.multiplier,
-                                both_targets=cache[f"{target.positive} {target.negative}"],
-                                empty_prompt=cache[""],
-                                weight=target.weight
-                            ),
-                        ]
-                    if both or enhance_positive:
-                        print("Encoding enhance positive")
-                        prompt_pairs += [
-                            # enhance standard, swap pos neg
-                            EncodedPromptPair(
-                                target_class=cache[target.target_class],
-                                target_class_with_neutral=cache[f"{target.target_class} {neutral}"],
-                                positive_target=cache[f"{target.negative}"],
-                                positive_target_with_neutral=cache[f"{target.negative} {neutral}"],
-                                negative_target=cache[f"{target.positive}"],
-                                negative_target_with_neutral=cache[f"{target.positive} {neutral}"],
-                                neutral=cache[neutral],
-                                action=ACTION_TYPES_SLIDER.ENHANCE_NEGATIVE,
-                                multiplier=target.multiplier,
-                                both_targets=cache[f"{target.positive} {target.negative}"],
-                                empty_prompt=cache[""],
-                                weight=target.weight
-                            ),
-                        ]
-                    # if both or enhance_positive:
-                    if both:
-                        print("Encoding erase positive (inverse)")
-                        prompt_pairs += [
-                            # erase inverted
-                            EncodedPromptPair(
-                                target_class=cache[target.target_class],
-                                target_class_with_neutral=cache[f"{target.target_class} {neutral}"],
-                                positive_target=cache[f"{target.negative}"],
-                                positive_target_with_neutral=cache[f"{target.negative} {neutral}"],
-                                negative_target=cache[f"{target.positive}"],
-                                negative_target_with_neutral=cache[f"{target.positive} {neutral}"],
-                                neutral=cache[neutral],
-                                action=ACTION_TYPES_SLIDER.ERASE_NEGATIVE,
-                                both_targets=cache[f"{target.positive} {target.negative}"],
-                                empty_prompt=cache[""],
-                                multiplier=target.multiplier * -1.0,
-                                weight=target.weight
-                            ),
-                        ]
-                    # if both or erase_negative:
-                    if both:
-                        print("Encoding enhance negative (inverse)")
-                        prompt_pairs += [
-                            # enhance inverted
-                            EncodedPromptPair(
-                                target_class=cache[target.target_class],
-                                target_class_with_neutral=cache[f"{target.target_class} {neutral}"],
-                                positive_target=cache[f"{target.positive}"],
-                                positive_target_with_neutral=cache[f"{target.positive} {neutral}"],
-                                negative_target=cache[f"{target.negative}"],
-                                negative_target_with_neutral=cache[f"{target.negative} {neutral}"],
-                                both_targets=cache[f"{target.positive} {target.negative}"],
-                                neutral=cache[neutral],
-                                action=ACTION_TYPES_SLIDER.ENHANCE_NEGATIVE,
-                                empty_prompt=cache[""],
-                                multiplier=target.multiplier * -1.0,
-                                weight=target.weight
-                            ),
-                        ]
+                    )
+                    if self.slider_config.batch_full_slide:
+                        # concat the prompt pairs
+                        # this allows us to run the entire 4 part process in one shot (for slider)
+                        self.prompt_chunk_size = 4
+                        concat_prompt_pair_batch = concat_prompt_pairs(prompt_pair_batch).to('cpu')
+                        prompt_pairs += [concat_prompt_pair_batch]
+                    else:
+                        self.prompt_chunk_size = 1
+                        # do them one at a time (probably not necessary after new optimizations)
+                        prompt_pairs += [x.to('cpu') for x in prompt_pair_batch]
 
             # setup anchors
             anchor_pairs = []
@@ -306,14 +137,27 @@ class TrainSliderProcess(BaseSDTrainProcess):
                     if cache[prompt] == None:
                         cache[prompt] = self.sd.encode_prompt(prompt)
 
-                anchor_pairs += [
+                anchor_batch = []
+                # we get the prompt pair multiplier from first prompt pair
+                # since they are all the same. We need to match their network polarity
+                prompt_pair_multipliers = prompt_pairs[0].multiplier_list
+                for prompt_multiplier in prompt_pair_multipliers:
+                    # match the network multiplier polarity
+                    anchor_scalar = 1.0 if prompt_multiplier > 0 else -1.0
+                    anchor_batch += [
                         EncodedAnchor(
                             prompt=cache[anchor.prompt],
                             neg_prompt=cache[anchor.neg_prompt],
-                        multiplier=anchor.multiplier
+                            multiplier=anchor.multiplier * anchor_scalar
                         )
                     ]
 
+                anchor_pairs += [
+                    concat_anchors(anchor_batch).to('cpu')
+                ]
+            if len(anchor_pairs) > 0:
+                self.anchor_pairs = anchor_pairs
+
         # move to cpu to save vram
         # We don't need text encoder anymore, but keep it on cpu for sampling
         # if text encoder is list
@@ -324,17 +168,13 @@ class TrainSliderProcess(BaseSDTrainProcess):
             self.sd.text_encoder.to("cpu")
         self.prompt_cache = cache
         self.prompt_pairs = prompt_pairs
-        self.anchor_pairs = anchor_pairs
+        # self.anchor_pairs = anchor_pairs
         flush()
         # end hook_before_train_loop
 
     def hook_train_loop(self):
         dtype = get_torch_dtype(self.train_config.dtype)
 
-        # get random multiplier between 1 and 3
-        rand_weight = 1
-        # rand_weight = torch.rand((1,)).item() * 2 + 1
-
         # get a random pair
         prompt_pair: EncodedPromptPair = self.prompt_pairs[
             torch.randint(0, len(self.prompt_pairs), (1,)).item()
@@ -346,11 +186,10 @@ class TrainSliderProcess(BaseSDTrainProcess):
         height, width = self.slider_config.resolutions[
             torch.randint(0, len(self.slider_config.resolutions), (1,)).item()
         ]
+        if self.train_config.gradient_checkpointing:
+            # may get disabled elsewhere
+            self.sd.unet.enable_gradient_checkpointing()
 
-        weight = prompt_pair.weight
-        multiplier = prompt_pair.multiplier
-
-        unet = self.sd.unet
         noise_scheduler = self.sd.noise_scheduler
         optimizer = self.optimizer
         lr_scheduler = self.lr_scheduler
@@ -368,9 +207,6 @@ class TrainSliderProcess(BaseSDTrainProcess):
                 guidance_scale=gs,
             )
 
-        # set network multiplier
-        self.network.multiplier = multiplier * rand_weight
-
         with torch.no_grad():
             self.sd.noise_scheduler.set_timesteps(
                 self.train_config.max_denoising_steps, device=self.device_torch
@@ -383,11 +219,14 @@ class TrainSliderProcess(BaseSDTrainProcess):
                 1, self.train_config.max_denoising_steps, (1,)
             ).item()
 
+            # for a complete slider, the batch size is 4 to begin with now
+            true_batch_size = prompt_pair.target_class.text_embeds.shape[0] * self.train_config.batch_size
+
             # get noise
             noise = self.sd.get_latent_noise(
                 pixel_height=height,
                 pixel_width=width,
-                batch_size=self.train_config.batch_size,
+                batch_size=true_batch_size,
                 noise_offset=self.train_config.noise_offset,
             ).to(self.device_torch, dtype=dtype)
 
@@ -397,7 +236,8 @@ class TrainSliderProcess(BaseSDTrainProcess):
 
             with self.network:
                 assert self.network.is_active
-                self.network.multiplier = multiplier * rand_weight
+                # pass the multiplier list to the network
+                self.network.multiplier = prompt_pair.multiplier_list
                 denoised_latents = self.sd.diffuse_some_steps(
                     latents,  # pass simple noise latents
                     train_tools.concat_prompt_embeddings(
@@ -410,19 +250,27 @@ class TrainSliderProcess(BaseSDTrainProcess):
                     guidance_scale=3,
                 )
 
+            # split the latents into out prompt pair chunks
+            denoised_latent_chunks = torch.chunk(denoised_latents, self.prompt_chunk_size, dim=0)
+
             noise_scheduler.set_timesteps(1000)
 
             current_timestep = noise_scheduler.timesteps[
                 int(timesteps_to * 1000 / self.train_config.max_denoising_steps)
             ]
 
+            # flush()  # 4.2GB to 3GB on 512x512
+
+            # 4.20 GB RAM for 512x512
             positive_latents = get_noise_pred(
                 prompt_pair.positive_target,  # negative prompt
                 prompt_pair.negative_target,  # positive prompt
                 1,
                 current_timestep,
                 denoised_latents
-            ).to("cpu", dtype=torch.float32)
+            )
+            positive_latents.requires_grad = False
+            positive_latents_chunks = torch.chunk(positive_latents, self.prompt_chunk_size, dim=0)
 
             neutral_latents = get_noise_pred(
                 prompt_pair.positive_target,  # negative prompt
@@ -430,7 +278,9 @@ class TrainSliderProcess(BaseSDTrainProcess):
                 1,
                 current_timestep,
                 denoised_latents
-            ).to("cpu", dtype=torch.float32)
+            )
+            neutral_latents.requires_grad = False
+            neutral_latents_chunks = torch.chunk(neutral_latents, self.prompt_chunk_size, dim=0)
 
             unconditional_latents = get_noise_pred(
                 prompt_pair.positive_target,  # negative prompt
@@ -438,87 +288,142 @@ class TrainSliderProcess(BaseSDTrainProcess):
                 1,
                 current_timestep,
                 denoised_latents
-            ).to("cpu", dtype=torch.float32)
+            )
+            unconditional_latents.requires_grad = False
+            unconditional_latents_chunks = torch.chunk(unconditional_latents, self.prompt_chunk_size, dim=0)
 
-        anchor_loss = None
+        flush()  # 4.2GB to 3GB on 512x512
+
+        # 4.20 GB RAM for 512x512
+        anchor_loss_float = None
         if len(self.anchor_pairs) > 0:
+            with torch.no_grad():
                 # get a random anchor pair
                 anchor: EncodedAnchor = self.anchor_pairs[
                     torch.randint(0, len(self.anchor_pairs), (1,)).item()
                 ]
-            with torch.no_grad():
+                anchor.to(self.device_torch, dtype=dtype)
+
+                # first we get the target prediction without network active
                 anchor_target_noise = get_noise_pred(
-                    anchor.prompt, anchor.neg_prompt, 1, current_timestep, denoised_latents
-                ).to("cpu", dtype=torch.float32)
+                    anchor.neg_prompt, anchor.prompt, 1, current_timestep, denoised_latents
+                    # ).to("cpu", dtype=torch.float32)
+                ).requires_grad_(False)
+
+                # to save vram, we will run these through separately while tracking grads
+                # otherwise it consumes a ton of vram and this isn't our speed bottleneck
+                anchor_chunks = split_anchors(anchor, self.prompt_chunk_size)
+                anchor_target_noise_chunks = torch.chunk(anchor_target_noise, self.prompt_chunk_size, dim=0)
+                assert len(anchor_chunks) == len(denoised_latent_chunks)
+
+            # 4.32 GB RAM for 512x512
             with self.network:
-                # anchor whatever weight  prompt pair is using
-                pos_nem_mult = 1.0 if prompt_pair.multiplier > 0 else -1.0
-                self.network.multiplier = anchor.multiplier * pos_nem_mult * rand_weight
+                assert self.network.is_active
+                anchor_float_losses = []
+                for anchor_chunk, denoised_latent_chunk, anchor_target_noise_chunk in zip(
+                        anchor_chunks, denoised_latent_chunks, anchor_target_noise_chunks
+                ):
+                    self.network.multiplier = anchor_chunk.multiplier_list
 
                     anchor_pred_noise = get_noise_pred(
-                    anchor.prompt, anchor.neg_prompt, 1, current_timestep, denoised_latents
-                ).to("cpu", dtype=torch.float32)
-
-                self.network.multiplier = prompt_pair.multiplier * rand_weight
-
-        with self.network:
-            self.network.multiplier = prompt_pair.multiplier * rand_weight
-            target_latents = get_noise_pred(
-                prompt_pair.positive_target,
-                prompt_pair.target_class,
-                1,
-                current_timestep,
-                denoised_latents
-            ).to("cpu", dtype=torch.float32)
-
-            # if self.logging_config.verbose:
-            #     self.print("target_latents:", target_latents[0, 0, :5, :5])
-
-        positive_latents.requires_grad = False
-        neutral_latents.requires_grad = False
-        unconditional_latents.requires_grad = False
-        if len(self.anchor_pairs) > 0:
-            anchor_target_noise.requires_grad = False
+                        anchor_chunk.neg_prompt, anchor_chunk.prompt, 1, current_timestep, denoised_latent_chunk
+                    )
+                    # 9.42 GB RAM for 512x512 -> 4.20 GB RAM for 512x512 with new grad_checkpointing
                     anchor_loss = loss_function(
-                anchor_target_noise,
+                        anchor_target_noise_chunk,
                         anchor_pred_noise,
                     )
-        erase = prompt_pair.action == ACTION_TYPES_SLIDER.ERASE_NEGATIVE
+                    anchor_float_losses.append(anchor_loss.item())
+                    # compute anchor loss gradients
+                    # we will accumulate them later
+                    # this saves a ton of memory doing them separately
+                    anchor_loss.backward()
+                    del anchor_pred_noise
+                    del anchor_target_noise_chunk
+                    del anchor_loss
+                    flush()
+
+            anchor_loss_float = sum(anchor_float_losses) / len(anchor_float_losses)
+            del anchor_chunks
+            del anchor_target_noise_chunks
+            del anchor_target_noise
+            # move anchor back to cpu
+            anchor.to("cpu")
+            flush()
+
+        prompt_pair_chunks = split_prompt_pairs(prompt_pair, self.prompt_chunk_size)
+        assert len(prompt_pair_chunks) == len(denoised_latent_chunks)
+        # 3.28 GB RAM for 512x512
+        with self.network:
+            assert self.network.is_active
+            loss_list = []
+            for prompt_pair_chunk, \
+                    denoised_latent_chunk, \
+                    positive_latents_chunk, \
+                    neutral_latents_chunk, \
+                    unconditional_latents_chunk \
+                    in zip(
+                prompt_pair_chunks,
+                denoised_latent_chunks,
+                positive_latents_chunks,
+                neutral_latents_chunks,
+                unconditional_latents_chunks,
+            ):
+                self.network.multiplier = prompt_pair_chunk.multiplier_list
+                target_latents = get_noise_pred(
+                    prompt_pair_chunk.positive_target,
+                    prompt_pair_chunk.target_class,
+                    1,
+                    current_timestep,
+                    denoised_latent_chunk
+                )
+
                 guidance_scale = 1.0
 
-        offset = guidance_scale * (positive_latents - unconditional_latents)
+                offset = guidance_scale * (positive_latents_chunk - unconditional_latents_chunk)
 
-        offset_neutral = neutral_latents
-        if erase:
-            offset_neutral -= offset
-        else:
-            # enhance
+                # make offset multiplier based on actions
+                offset_multiplier_list = []
+                for action in prompt_pair_chunk.action_list:
+                    if action == ACTION_TYPES_SLIDER.ERASE_NEGATIVE:
+                        offset_multiplier_list += [-1.0]
+                    elif action == ACTION_TYPES_SLIDER.ENHANCE_NEGATIVE:
+                        offset_multiplier_list += [1.0]
+
+                offset_multiplier = torch.tensor(offset_multiplier_list).to(offset.device, dtype=offset.dtype)
+                # make offset multiplier match rank of offset
+                offset_multiplier = offset_multiplier.view(offset.shape[0], 1, 1, 1)
+                offset *= offset_multiplier
+
+                offset_neutral = neutral_latents_chunk
+                # offsets are already adjusted on a per-batch basis
                 offset_neutral += offset
 
+                # 16.15 GB RAM for 512x512 -> 4.20GB RAM for 512x512 with new grad_checkpointing
                 loss = loss_function(
                     target_latents,
                     offset_neutral,
-        ) * weight
-
-        loss_slide = loss.item()
-
-        if anchor_loss is not None:
-            loss += anchor_loss
-
-        loss_float = loss.item()
-
-        loss = loss.to(self.device_torch)
+                ) * prompt_pair_chunk.weight
 
                 loss.backward()
+                loss_list.append(loss.item())
+                del target_latents
+                del offset_neutral
+                del loss
+                flush()
+
         optimizer.step()
         lr_scheduler.step()
 
+        loss_float = sum(loss_list) / len(loss_list)
+        if anchor_loss_float is not None:
+            loss_float += anchor_loss_float
+
         del (
             positive_latents,
             neutral_latents,
             unconditional_latents,
-            target_latents,
-            latents,
+            latents
         )
         # move back to cpu
         prompt_pair.to("cpu")
@@ -530,9 +435,9 @@ class TrainSliderProcess(BaseSDTrainProcess):
         loss_dict = OrderedDict(
             {'loss': loss_float},
         )
-        if anchor_loss is not None:
-            loss_dict['sl_l'] = loss_slide
-            loss_dict['an_l'] = anchor_loss.item()
+        if anchor_loss_float is not None:
+            loss_dict['sl_l'] = loss_float
+            loss_dict['an_l'] = anchor_loss_float
 
         return loss_dict
         # end hook_train_loop

toolkit/config_modules.py

@@ -108,6 +108,7 @@ class SliderConfig:
         self.resolutions: List[List[int]] = kwargs.get('resolutions', [[512, 512]])
         self.prompt_file: str = kwargs.get('prompt_file', None)
         self.prompt_tensors: str = kwargs.get('prompt_tensors', None)
+        self.batch_full_slide: bool = kwargs.get('batch_full_slide', True)
 
 
 class GenerateImageConfig:

toolkit/layers.py

@@ -1,6 +1,7 @@
 import torch
 import torch.nn as nn
 import numpy as np
+from torch.utils.checkpoint import checkpoint
 
 
 class ReductionKernel(nn.Module):
@@ -29,3 +30,15 @@ class ReductionKernel(nn.Module):
 
     def forward(self, x):
         return nn.functional.conv2d(x, self.kernel, stride=self.kernel_size, padding=0, groups=1)
+
+
+class CheckpointGradients(nn.Module):
+    def __init__(self, is_gradient_checkpointing=True):
+        super(CheckpointGradients, self).__init__()
+        self.is_gradient_checkpointing = is_gradient_checkpointing
+
+    def forward(self, module, *args, num_chunks=1):
+        if self.is_gradient_checkpointing:
+            return checkpoint(module, *args, num_chunks=self.num_chunks)
+        else:
+            return module(*args)

toolkit/lora_special.py

@@ -1,4 +1,6 @@
+import math
 import os
+import re
 import sys
 from typing import List, Optional, Dict, Type, Union
 
@@ -9,7 +11,170 @@ from .paths import SD_SCRIPTS_ROOT
 
 sys.path.append(SD_SCRIPTS_ROOT)
 
-from networks.lora import LoRANetwork, LoRAModule, get_block_index
+from networks.lora import LoRANetwork, get_block_index
+
+from torch.utils.checkpoint import checkpoint
+
+RE_UPDOWN = re.compile(r"(up|down)_blocks_(\d+)_(resnets|upsamplers|downsamplers|attentions)_(\d+)_")
+
+
+class LoRAModule(torch.nn.Module):
+    """
+    replaces forward method of the original Linear, instead of replacing the original Linear module.
+    """
+
+    def __init__(
+            self,
+            lora_name,
+            org_module: torch.nn.Module,
+            multiplier=1.0,
+            lora_dim=4,
+            alpha=1,
+            dropout=None,
+            rank_dropout=None,
+            module_dropout=None,
+    ):
+        """if alpha == 0 or None, alpha is rank (no scaling)."""
+        super().__init__()
+        self.lora_name = lora_name
+
+        if org_module.__class__.__name__ == "Conv2d":
+            in_dim = org_module.in_channels
+            out_dim = org_module.out_channels
+        else:
+            in_dim = org_module.in_features
+            out_dim = org_module.out_features
+
+        # if limit_rank:
+        #   self.lora_dim = min(lora_dim, in_dim, out_dim)
+        #   if self.lora_dim != lora_dim:
+        #     print(f"{lora_name} dim (rank) is changed to: {self.lora_dim}")
+        # else:
+        self.lora_dim = lora_dim
+
+        if org_module.__class__.__name__ == "Conv2d":
+            kernel_size = org_module.kernel_size
+            stride = org_module.stride
+            padding = org_module.padding
+            self.lora_down = torch.nn.Conv2d(in_dim, self.lora_dim, kernel_size, stride, padding, bias=False)
+            self.lora_up = torch.nn.Conv2d(self.lora_dim, out_dim, (1, 1), (1, 1), bias=False)
+        else:
+            self.lora_down = torch.nn.Linear(in_dim, self.lora_dim, bias=False)
+            self.lora_up = torch.nn.Linear(self.lora_dim, out_dim, bias=False)
+
+        if type(alpha) == torch.Tensor:
+            alpha = alpha.detach().float().numpy()  # without casting, bf16 causes error
+        alpha = self.lora_dim if alpha is None or alpha == 0 else alpha
+        self.scale = alpha / self.lora_dim
+        self.register_buffer("alpha", torch.tensor(alpha))  # 定数として扱える
+
+        # same as microsoft's
+        torch.nn.init.kaiming_uniform_(self.lora_down.weight, a=math.sqrt(5))
+        torch.nn.init.zeros_(self.lora_up.weight)
+
+        self.multiplier: Union[float, List[float]] = multiplier
+        self.org_module = org_module  # remove in applying
+        self.dropout = dropout
+        self.rank_dropout = rank_dropout
+        self.module_dropout = module_dropout
+        self.is_checkpointing = False
+
+    def apply_to(self):
+        self.org_forward = self.org_module.forward
+        self.org_module.forward = self.forward
+        del self.org_module
+
+    # this allows us to set different multipliers on a per item in a batch basis
+    # allowing us to run positive and negative weights in the same batch
+    # really only useful for slider training for now
+    def get_multiplier(self, lora_up):
+        batch_size = lora_up.size(0)
+        # batch will have all negative prompts first and positive prompts second
+        # our multiplier list is for a prompt pair. So we need to repeat it for positive and negative prompts
+        # if there is more than our multiplier, it is liekly a batch size increase, so we need to
+        # interleve the multipliers
+        if isinstance(self.multiplier, list):
+            if len(self.multiplier) == 0:
+                # single item, just return it
+                return self.multiplier[0]
+            else:
+                # we have a list of multipliers, so we need to get the multiplier for this batch
+                multiplier_tensor = torch.tensor(self.multiplier * 2).to(lora_up.device, dtype=lora_up.dtype)
+                # should be 1 for if total batch size was 1
+                num_interleaves = (batch_size // 2) // len(self.multiplier)
+                multiplier_tensor = multiplier_tensor.repeat_interleave(num_interleaves)
+
+                # match lora_up rank
+                if len(lora_up.size()) == 2:
+                    multiplier_tensor = multiplier_tensor.view(-1, 1)
+                elif len(lora_up.size()) == 3:
+                    multiplier_tensor = multiplier_tensor.view(-1, 1, 1)
+                elif len(lora_up.size()) == 4:
+                    multiplier_tensor = multiplier_tensor.view(-1, 1, 1, 1)
+                return multiplier_tensor
+
+        else:
+            return self.multiplier
+
+    def _call_forward(self, x):
+        # module dropout
+        if self.module_dropout is not None and self.training:
+            if torch.rand(1) < self.module_dropout:
+                return 0.0  # added to original forward
+
+        lx = self.lora_down(x)
+
+        # normal dropout
+        if self.dropout is not None and self.training:
+            lx = torch.nn.functional.dropout(lx, p=self.dropout)
+
+        # rank dropout
+        if self.rank_dropout is not None and self.training:
+            mask = torch.rand((lx.size(0), self.lora_dim), device=lx.device) > self.rank_dropout
+            if len(lx.size()) == 3:
+                mask = mask.unsqueeze(1)  # for Text Encoder
+            elif len(lx.size()) == 4:
+                mask = mask.unsqueeze(-1).unsqueeze(-1)  # for Conv2d
+            lx = lx * mask
+
+            # scaling for rank dropout: treat as if the rank is changed
+            # maskから計算することも考えられるが、augmentation的な効果を期待してrank_dropoutを用いる
+            scale = self.scale * (1.0 / (1.0 - self.rank_dropout))  # redundant for readability
+        else:
+            scale = self.scale
+
+        lx = self.lora_up(lx)
+
+        multiplier = self.get_multiplier(lx)
+
+        return lx * multiplier * scale
+
+    def create_custom_forward(self):
+        def custom_forward(*inputs):
+            return self._call_forward(*inputs)
+
+        return custom_forward
+
+    def forward(self, x):
+        org_forwarded = self.org_forward(x)
+        # TODO this just loses the grad. Not sure why. Probably why no one else is doing it either
+        # if torch.is_grad_enabled() and self.is_checkpointing and self.training:
+        #     lora_output = checkpoint(
+        #         self.create_custom_forward(),
+        #         x,
+        #     )
+        # else:
+        #     lora_output = self._call_forward(x)
+
+        lora_output = self._call_forward(x)
+
+        return org_forwarded + lora_output
+
+    def enable_gradient_checkpointing(self):
+        self.is_checkpointing = True
+
+    def disable_gradient_checkpointing(self):
+        self.is_checkpointing = False
 
 
 class LoRASpecialNetwork(LoRANetwork):
@@ -70,6 +235,7 @@ class LoRASpecialNetwork(LoRANetwork):
         self.dropout = dropout
         self.rank_dropout = rank_dropout
         self.module_dropout = module_dropout
+        self.is_checkpointing = False
 
         if modules_dim is not None:
             print(f"create LoRA network from weights")
@@ -236,14 +402,11 @@ class LoRASpecialNetwork(LoRANetwork):
             torch.save(state_dict, file)
 
     @property
-    def multiplier(self):
+    def multiplier(self) -> Union[float, List[float]]:
         return self._multiplier
 
     @multiplier.setter
-    def multiplier(self, value):
-        # only update if changed
-        if self._multiplier == value:
-            return
+    def multiplier(self, value: Union[float, List[float]]):
         self._multiplier = value
         self._update_lora_multiplier()
 
@@ -264,6 +427,8 @@ class LoRASpecialNetwork(LoRANetwork):
                 for lora in self.text_encoder_loras:
                     lora.multiplier = 0
 
+    # called when the context manager is entered
+    # ie: with network:
     def __enter__(self):
         self.is_active = True
         self._update_lora_multiplier()
@@ -281,3 +446,29 @@ class LoRASpecialNetwork(LoRANetwork):
             loras += self.text_encoder_loras
         for lora in loras:
             lora.to(device, dtype)
+
+    def _update_checkpointing(self):
+        if self.is_checkpointing:
+            if hasattr(self, 'unet_loras'):
+                for lora in self.unet_loras:
+                    lora.enable_gradient_checkpointing()
+            if hasattr(self, 'text_encoder_loras'):
+                for lora in self.text_encoder_loras:
+                    lora.enable_gradient_checkpointing()
+        else:
+            if hasattr(self, 'unet_loras'):
+                for lora in self.unet_loras:
+                    lora.disable_gradient_checkpointing()
+            if hasattr(self, 'text_encoder_loras'):
+                for lora in self.text_encoder_loras:
+                    lora.disable_gradient_checkpointing()
+
+    def enable_gradient_checkpointing(self):
+        # not supported
+        self.is_checkpointing = True
+        self._update_checkpointing()
+
+    def disable_gradient_checkpointing(self):
+        # not supported
+        self.is_checkpointing = False
+        self._update_checkpointing()

toolkit/prompt_utils.py

@@ -0,0 +1,387 @@
+import os
+from typing import Optional, TYPE_CHECKING, List
+
+import torch
+from safetensors.torch import load_file, save_file
+from tqdm import tqdm
+
+from toolkit.stable_diffusion_model import PromptEmbeds
+from toolkit.train_tools import get_torch_dtype
+
+
+class ACTION_TYPES_SLIDER:
+    ERASE_NEGATIVE = 0
+    ENHANCE_NEGATIVE = 1
+
+
+class EncodedPromptPair:
+    def __init__(
+            self,
+            target_class,
+            target_class_with_neutral,
+            positive_target,
+            positive_target_with_neutral,
+            negative_target,
+            negative_target_with_neutral,
+            neutral,
+            empty_prompt,
+            both_targets,
+            action=ACTION_TYPES_SLIDER.ERASE_NEGATIVE,
+            action_list=None,
+            multiplier=1.0,
+            multiplier_list=None,
+            weight=1.0
+    ):
+        self.target_class: PromptEmbeds = target_class
+        self.target_class_with_neutral: PromptEmbeds = target_class_with_neutral
+        self.positive_target: PromptEmbeds = positive_target
+        self.positive_target_with_neutral: PromptEmbeds = positive_target_with_neutral
+        self.negative_target: PromptEmbeds = negative_target
+        self.negative_target_with_neutral: PromptEmbeds = negative_target_with_neutral
+        self.neutral: PromptEmbeds = neutral
+        self.empty_prompt: PromptEmbeds = empty_prompt
+        self.both_targets: PromptEmbeds = both_targets
+        self.multiplier: float = multiplier
+        if multiplier_list is not None:
+            self.multiplier_list: list[float] = multiplier_list
+        else:
+            self.multiplier_list: list[float] = [multiplier]
+        self.action: int = action
+        if action_list is not None:
+            self.action_list: list[int] = action_list
+        else:
+            self.action_list: list[int] = [action]
+        self.weight: float = weight
+
+    # simulate torch to for tensors
+    def to(self, *args, **kwargs):
+        self.target_class = self.target_class.to(*args, **kwargs)
+        self.positive_target = self.positive_target.to(*args, **kwargs)
+        self.positive_target_with_neutral = self.positive_target_with_neutral.to(*args, **kwargs)
+        self.negative_target = self.negative_target.to(*args, **kwargs)
+        self.negative_target_with_neutral = self.negative_target_with_neutral.to(*args, **kwargs)
+        self.neutral = self.neutral.to(*args, **kwargs)
+        self.empty_prompt = self.empty_prompt.to(*args, **kwargs)
+        self.both_targets = self.both_targets.to(*args, **kwargs)
+        return self
+
+
+def concat_prompt_embeds(prompt_embeds: list[PromptEmbeds]):
+    text_embeds = torch.cat([p.text_embeds for p in prompt_embeds], dim=0)
+    pooled_embeds = None
+    if prompt_embeds[0].pooled_embeds is not None:
+        pooled_embeds = torch.cat([p.pooled_embeds for p in prompt_embeds], dim=0)
+    return PromptEmbeds([text_embeds, pooled_embeds])
+
+
+def concat_prompt_pairs(prompt_pairs: list[EncodedPromptPair]):
+    weight = prompt_pairs[0].weight
+    target_class = concat_prompt_embeds([p.target_class for p in prompt_pairs])
+    target_class_with_neutral = concat_prompt_embeds([p.target_class_with_neutral for p in prompt_pairs])
+    positive_target = concat_prompt_embeds([p.positive_target for p in prompt_pairs])
+    positive_target_with_neutral = concat_prompt_embeds([p.positive_target_with_neutral for p in prompt_pairs])
+    negative_target = concat_prompt_embeds([p.negative_target for p in prompt_pairs])
+    negative_target_with_neutral = concat_prompt_embeds([p.negative_target_with_neutral for p in prompt_pairs])
+    neutral = concat_prompt_embeds([p.neutral for p in prompt_pairs])
+    empty_prompt = concat_prompt_embeds([p.empty_prompt for p in prompt_pairs])
+    both_targets = concat_prompt_embeds([p.both_targets for p in prompt_pairs])
+    # combine all the lists
+    action_list = []
+    multiplier_list = []
+    weight_list = []
+    for p in prompt_pairs:
+        action_list += p.action_list
+        multiplier_list += p.multiplier_list
+    return EncodedPromptPair(
+        target_class=target_class,
+        target_class_with_neutral=target_class_with_neutral,
+        positive_target=positive_target,
+        positive_target_with_neutral=positive_target_with_neutral,
+        negative_target=negative_target,
+        negative_target_with_neutral=negative_target_with_neutral,
+        neutral=neutral,
+        empty_prompt=empty_prompt,
+        both_targets=both_targets,
+        action_list=action_list,
+        multiplier_list=multiplier_list,
+        weight=weight
+    )
+
+
+def split_prompt_embeds(concatenated: PromptEmbeds, num_parts=None) -> List[PromptEmbeds]:
+    if num_parts is None:
+        # use batch size
+        num_parts = concatenated.text_embeds.shape[0]
+    text_embeds_splits = torch.chunk(concatenated.text_embeds, num_parts, dim=0)
+
+    if concatenated.pooled_embeds is not None:
+        pooled_embeds_splits = torch.chunk(concatenated.pooled_embeds, num_parts, dim=0)
+    else:
+        pooled_embeds_splits = [None] * num_parts
+
+    prompt_embeds_list = [
+        PromptEmbeds([text, pooled])
+        for text, pooled in zip(text_embeds_splits, pooled_embeds_splits)
+    ]
+
+    return prompt_embeds_list
+
+
+def split_prompt_pairs(concatenated: EncodedPromptPair, num_embeds=None) -> List[EncodedPromptPair]:
+    target_class_splits = split_prompt_embeds(concatenated.target_class, num_embeds)
+    target_class_with_neutral_splits = split_prompt_embeds(concatenated.target_class_with_neutral, num_embeds)
+    positive_target_splits = split_prompt_embeds(concatenated.positive_target, num_embeds)
+    positive_target_with_neutral_splits = split_prompt_embeds(concatenated.positive_target_with_neutral, num_embeds)
+    negative_target_splits = split_prompt_embeds(concatenated.negative_target, num_embeds)
+    negative_target_with_neutral_splits = split_prompt_embeds(concatenated.negative_target_with_neutral, num_embeds)
+    neutral_splits = split_prompt_embeds(concatenated.neutral, num_embeds)
+    empty_prompt_splits = split_prompt_embeds(concatenated.empty_prompt, num_embeds)
+    both_targets_splits = split_prompt_embeds(concatenated.both_targets, num_embeds)
+
+    prompt_pairs = []
+    for i in range(len(target_class_splits)):
+        action_list_split = concatenated.action_list[i::len(target_class_splits)]
+        multiplier_list_split = concatenated.multiplier_list[i::len(target_class_splits)]
+
+        prompt_pair = EncodedPromptPair(
+            target_class=target_class_splits[i],
+            target_class_with_neutral=target_class_with_neutral_splits[i],
+            positive_target=positive_target_splits[i],
+            positive_target_with_neutral=positive_target_with_neutral_splits[i],
+            negative_target=negative_target_splits[i],
+            negative_target_with_neutral=negative_target_with_neutral_splits[i],
+            neutral=neutral_splits[i],
+            empty_prompt=empty_prompt_splits[i],
+            both_targets=both_targets_splits[i],
+            action_list=action_list_split,
+            multiplier_list=multiplier_list_split,
+            weight=concatenated.weight
+        )
+        prompt_pairs.append(prompt_pair)
+
+    return prompt_pairs
+
+
+class PromptEmbedsCache:
+    prompts: dict[str, PromptEmbeds] = {}
+
+    def __setitem__(self, __name: str, __value: PromptEmbeds) -> None:
+        self.prompts[__name] = __value
+
+    def __getitem__(self, __name: str) -> Optional[PromptEmbeds]:
+        if __name in self.prompts:
+            return self.prompts[__name]
+        else:
+            return None
+
+
+class EncodedAnchor:
+    def __init__(
+            self,
+            prompt,
+            neg_prompt,
+            multiplier=1.0,
+            multiplier_list=None
+    ):
+        self.prompt = prompt
+        self.neg_prompt = neg_prompt
+        self.multiplier = multiplier
+
+        if multiplier_list is not None:
+            self.multiplier_list: list[float] = multiplier_list
+        else:
+            self.multiplier_list: list[float] = [multiplier]
+
+    def to(self, *args, **kwargs):
+        self.prompt = self.prompt.to(*args, **kwargs)
+        self.neg_prompt = self.neg_prompt.to(*args, **kwargs)
+        return self
+
+
+def concat_anchors(anchors: list[EncodedAnchor]):
+    prompt = concat_prompt_embeds([a.prompt for a in anchors])
+    neg_prompt = concat_prompt_embeds([a.neg_prompt for a in anchors])
+    return EncodedAnchor(
+        prompt=prompt,
+        neg_prompt=neg_prompt,
+        multiplier_list=[a.multiplier for a in anchors]
+    )
+
+
+def split_anchors(concatenated: EncodedAnchor, num_anchors: int = 4) -> List[EncodedAnchor]:
+    prompt_splits = split_prompt_embeds(concatenated.prompt, num_anchors)
+    neg_prompt_splits = split_prompt_embeds(concatenated.neg_prompt, num_anchors)
+    multiplier_list_splits = torch.chunk(torch.tensor(concatenated.multiplier_list), num_anchors)
+
+    anchors = []
+    for prompt, neg_prompt, multiplier in zip(prompt_splits, neg_prompt_splits, multiplier_list_splits):
+        anchor = EncodedAnchor(
+            prompt=prompt,
+            neg_prompt=neg_prompt,
+            multiplier=multiplier.tolist()
+        )
+        anchors.append(anchor)
+
+    return anchors
+
+
+if TYPE_CHECKING:
+    from toolkit.stable_diffusion_model import StableDiffusion
+
+
+@torch.no_grad()
+def encode_prompts_to_cache(
+        prompt_list: list[str],
+        sd: "StableDiffusion",
+        cache: Optional[PromptEmbedsCache] = None,
+        prompt_tensor_file: Optional[str] = None,
+) -> PromptEmbedsCache:
+    # TODO: add support for larger prompts
+    if cache is None:
+        cache = PromptEmbedsCache()
+
+    if prompt_tensor_file is not None:
+        # check to see if it exists
+        if os.path.exists(prompt_tensor_file):
+            # load it.
+            print(f"Loading prompt tensors from {prompt_tensor_file}")
+            prompt_tensors = load_file(prompt_tensor_file, device='cpu')
+            # add them to the cache
+            for prompt_txt, prompt_tensor in tqdm(prompt_tensors.items(), desc="Loading prompts", leave=False):
+                if prompt_txt.startswith("te:"):
+                    prompt = prompt_txt[3:]
+                    # text_embeds
+                    text_embeds = prompt_tensor
+                    pooled_embeds = None
+                    # find pool embeds
+                    if f"pe:{prompt}" in prompt_tensors:
+                        pooled_embeds = prompt_tensors[f"pe:{prompt}"]
+
+                    # make it
+                    prompt_embeds = PromptEmbeds([text_embeds, pooled_embeds])
+                    cache[prompt] = prompt_embeds.to(device='cpu', dtype=torch.float32)
+
+    if len(cache.prompts) == 0:
+        print("Prompt tensors not found. Encoding prompts..")
+        empty_prompt = ""
+        # encode empty_prompt
+        cache[empty_prompt] = sd.encode_prompt(empty_prompt)
+
+        for p in tqdm(prompt_list, desc="Encoding prompts", leave=False):
+            # build the cache
+            if cache[p] is None:
+                cache[p] = sd.encode_prompt(p).to(device="cpu", dtype=torch.float16)
+
+        # should we shard? It can get large
+        if prompt_tensor_file:
+            print(f"Saving prompt tensors to {prompt_tensor_file}")
+            state_dict = {}
+            for prompt_txt, prompt_embeds in cache.prompts.items():
+                state_dict[f"te:{prompt_txt}"] = prompt_embeds.text_embeds.to(
+                    "cpu", dtype=get_torch_dtype('fp16')
+                )
+                if prompt_embeds.pooled_embeds is not None:
+                    state_dict[f"pe:{prompt_txt}"] = prompt_embeds.pooled_embeds.to(
+                        "cpu",
+                        dtype=get_torch_dtype('fp16')
+                    )
+            save_file(state_dict, prompt_tensor_file)
+
+    return cache
+
+
+if TYPE_CHECKING:
+    from toolkit.config_modules import SliderTargetConfig
+
+
+@torch.no_grad()
+def build_prompt_pair_batch_from_cache(
+        cache: PromptEmbedsCache,
+        target: 'SliderTargetConfig',
+        neutral: Optional[str] = '',
+) -> list[EncodedPromptPair]:
+    erase_negative = len(target.positive.strip()) == 0
+    enhance_positive = len(target.negative.strip()) == 0
+
+    both = not erase_negative and not enhance_positive
+
+    prompt_pair_batch = []
+
+    if both or erase_negative:
+        print("Encoding erase negative")
+        prompt_pair_batch += [
+            # erase standard
+            EncodedPromptPair(
+                target_class=cache[target.target_class],
+                target_class_with_neutral=cache[f"{target.target_class} {neutral}"],
+                positive_target=cache[f"{target.positive}"],
+                positive_target_with_neutral=cache[f"{target.positive} {neutral}"],
+                negative_target=cache[f"{target.negative}"],
+                negative_target_with_neutral=cache[f"{target.negative} {neutral}"],
+                neutral=cache[neutral],
+                action=ACTION_TYPES_SLIDER.ERASE_NEGATIVE,
+                multiplier=target.multiplier,
+                both_targets=cache[f"{target.positive} {target.negative}"],
+                empty_prompt=cache[""],
+                weight=target.weight
+            ),
+        ]
+    if both or enhance_positive:
+        print("Encoding enhance positive")
+        prompt_pair_batch += [
+            # enhance standard, swap pos neg
+            EncodedPromptPair(
+                target_class=cache[target.target_class],
+                target_class_with_neutral=cache[f"{target.target_class} {neutral}"],
+                positive_target=cache[f"{target.negative}"],
+                positive_target_with_neutral=cache[f"{target.negative} {neutral}"],
+                negative_target=cache[f"{target.positive}"],
+                negative_target_with_neutral=cache[f"{target.positive} {neutral}"],
+                neutral=cache[neutral],
+                action=ACTION_TYPES_SLIDER.ENHANCE_NEGATIVE,
+                multiplier=target.multiplier,
+                both_targets=cache[f"{target.positive} {target.negative}"],
+                empty_prompt=cache[""],
+                weight=target.weight
+            ),
+        ]
+    if both or enhance_positive:
+        print("Encoding erase positive (inverse)")
+        prompt_pair_batch += [
+            # erase inverted
+            EncodedPromptPair(
+                target_class=cache[target.target_class],
+                target_class_with_neutral=cache[f"{target.target_class} {neutral}"],
+                positive_target=cache[f"{target.negative}"],
+                positive_target_with_neutral=cache[f"{target.negative} {neutral}"],
+                negative_target=cache[f"{target.positive}"],
+                negative_target_with_neutral=cache[f"{target.positive} {neutral}"],
+                neutral=cache[neutral],
+                action=ACTION_TYPES_SLIDER.ERASE_NEGATIVE,
+                both_targets=cache[f"{target.positive} {target.negative}"],
+                empty_prompt=cache[""],
+                multiplier=target.multiplier * -1.0,
+                weight=target.weight
+            ),
+        ]
+    if both or erase_negative:
+        print("Encoding enhance negative (inverse)")
+        prompt_pair_batch += [
+            # enhance inverted
+            EncodedPromptPair(
+                target_class=cache[target.target_class],
+                target_class_with_neutral=cache[f"{target.target_class} {neutral}"],
+                positive_target=cache[f"{target.positive}"],
+                positive_target_with_neutral=cache[f"{target.positive} {neutral}"],
+                negative_target=cache[f"{target.negative}"],
+                negative_target_with_neutral=cache[f"{target.negative} {neutral}"],
+                both_targets=cache[f"{target.positive} {target.negative}"],
+                neutral=cache[neutral],
+                action=ACTION_TYPES_SLIDER.ENHANCE_NEGATIVE,
+                empty_prompt=cache[""],
+                multiplier=target.multiplier * -1.0,
+                weight=target.weight
+            ),
+        ]
+
+    return prompt_pair_batch

toolkit/stable_diffusion_model.py

@@ -1,6 +1,6 @@
 import gc
 import typing
-from typing import Union, OrderedDict, List
+from typing import Union, OrderedDict, List, Tuple
 import sys
 import os
 
@@ -50,10 +50,10 @@ VAE_SCALE_FACTOR = 8  # 2 ** (len(vae.config.block_out_channels) - 1) = 8
 
 
 class PromptEmbeds:
-    text_embeds: torch.FloatTensor
-    pooled_embeds: Union[torch.FloatTensor, None]
+    text_embeds: torch.Tensor
+    pooled_embeds: Union[torch.Tensor, None]
 
-    def __init__(self, args) -> None:
+    def __init__(self, args: Union[Tuple[torch.Tensor], List[torch.Tensor], torch.Tensor]) -> None:
         if isinstance(args, list) or isinstance(args, tuple):
             # xl
             self.text_embeds = args[0]
@@ -139,6 +139,17 @@ class StableDiffusion:
                 pipln = self.custom_pipeline
             else:
                 pipln = CustomStableDiffusionXLPipeline
+
+            # see if path exists
+            if not os.path.exists(self.model_config.name_or_path):
+                # try to load with default diffusers
+                pipe = pipln.from_pretrained(
+                    self.model_config.name_or_path,
+                    dtype=dtype,
+                    scheduler_type='ddpm',
+                    device=self.device_torch,
+                ).to(self.device_torch)
+            else:
                 pipe = pipln.from_single_file(
                     self.model_config.name_or_path,
                     dtype=dtype,
@@ -158,6 +169,19 @@ class StableDiffusion:
                 pipln = self.custom_pipeline
             else:
                 pipln = CustomStableDiffusionPipeline
+
+            # see if path exists
+            if not os.path.exists(self.model_config.name_or_path):
+                # try to load with default diffusers
+                pipe = pipln.from_pretrained(
+                    self.model_config.name_or_path,
+                    dtype=dtype,
+                    scheduler_type='dpm',
+                    device=self.device_torch,
+                    load_safety_checker=False,
+                    requires_safety_checker=False,
+                ).to(self.device_torch)
+            else:
                 pipe = pipln.from_single_file(
                     self.model_config.name_or_path,
                     dtype=dtype,