Files
ik_llama.cpp/src/llama-cparams.h
Kawrakow 2fe098e938 Async compute graph evaluation (2 or more GPUs) (#1089)
* WIP: absorb adding input into std_attn and std_ffn

* WIP: NCCL infra

* WIP: add reduce and fake_cpy ops

* WIP

* WIP: graph appears to work, layer is broken

* WIP: Qwen3-MoE works with graph, layer still broken

* WIP: GLM-4.5 graph works

* WIP: fix sm layer (dense)

* WIP: fix sm layer (MoE)

* WIP: fast PP with bespoke 4-GPU NCCL

I guess, I'm not using NCCL the right way as PP is very
low with a single communicator group for 3 or more GPUs.
But if I create 4 communicator groups for pairs of GPUs
(0,1, 2,3, 0,2, 1,3) and use that, PP is fast: I'm hitting
1500 t/s for L3-70B on the 4x3090 system, which is
~20% better than the previous sm graph without NCCL.
But that cannot be the solution (I cannot be creating pairwise
communicators and associated logic for every possible number of GPUs).

* WIP: Cohere2

* Explicitely set device

* Bespoke 3-GPU case

* WIP

* Do not repeat get_rows multiple times

* Fix 3 GPUs

* OK, let's leave it in

* Simple async

* This sync seems enough

* Only do async for 4 or more backends

With 2 GPUs (so, 3 backends) not using async is slightly faster

* Scheduler changes

* Use OpenMP if available

Surprisingly (at least to me), this is quite a bit faster than
std::thread and std::barrier. GLM-4.5-AIR with 4 GPUs is now
at 105 t/s at zero context!

* Do not use OpenMP if there are tensor overrides

* Set omp max active levels

* Be more careful with having set the device before using a stream

* Command line option to turn on async. Set to false by defualt for now

---------

Co-authored-by: Iwan Kawrakow <iwan.kawrakow@gmail.com>
2025-12-27 08:18:06 +01:00

55 lines
1.4 KiB
C++

#pragma once
#include "llama-impl.h"
#include <cstdint>
struct llama_cparams {
uint32_t n_ctx; // context size used during inference
uint32_t n_batch;
uint32_t n_ubatch;
uint32_t n_seq_max;
uint32_t n_threads; // number of threads to use for generation
uint32_t n_threads_batch; // number of threads to use for batch processing
std::vector<std::string> devices;
std::vector<std::string> devices_draft;
float rope_freq_base;
float rope_freq_scale;
uint32_t n_ctx_orig_yarn;
// These hyperparameters are not exposed in GGUF, because all
// existing YaRN models use the same values for them.
float yarn_ext_factor;
float yarn_attn_factor;
float yarn_beta_fast;
float yarn_beta_slow;
float defrag_thold;
bool embeddings;
bool causal_attn;
bool offload_kqv;
bool flash_attn;
int mla_attn;
int attn_max_batch;
bool fused_moe_up_gate;
bool grouped_expert_routing;
bool fused_up_gate;
bool fused_mmad;
bool rope_cache;
bool graph_reuse;
bool k_cache_hadamard;
bool split_mode_graph_scheduling;
bool split_mode_f16;
bool scheduler_async;
int min_experts;
float thresh_experts;
enum llama_pooling_type pooling_type;
ggml_backend_sched_eval_callback cb_eval;
void * cb_eval_user_data;
void * cuda_params;
};