[CK_TILE] moe sorting optimize local_token (#2469)

* fix bug in loops that need use local tokens to compute

* support extra chain local_token

* update

* update

* refine some main

* update

* support dispatch_policy

* fix 15 example
This commit is contained in:
carlushuang
2025-07-15 09:42:18 +08:00
committed by GitHub
parent 141bf2d54d
commit cfe211cc60
9 changed files with 579 additions and 94 deletions

View File

@@ -35,7 +35,20 @@ auto create_args(int argc, char* argv[])
.insert("e", "8", "number of num_experts")
.insert("k", "4", "topk")
.insert("unit", "32", "unit_size")
#if MOE_SORTING_FMOE_2D_BUF
.insert("moe_buf_interm_dim", "0", "interm_dim(col) of the following fmoe buf")
.insert(
"moe_buf_elem_bytes", "2", "fmoe buf element byte size, 1:8bit, 2:16bit, 4:32bit...")
#else
.insert("moe_buf_size", "0", "moe_buf_size")
#endif
.insert("ci",
"1",
"clear workspace inside API or not(if \"0\", require manually clear outside)")
.insert(
"dispatch",
"0",
"dispatch policy. 0:automatically pick up kernel, 1:use single kernel, 2:use mp kernel")
.insert("local_eid",
"-1",
"a list of experts enabled as local expert. e.g. \"0,1,4,5\"\n"
@@ -88,10 +101,17 @@ bool test_moe_sorting(ck_tile::ArgParser args)
int topk = args.get_int("k");
int seed = args.get_int("seed");
int unit_size = args.get_int("unit");
int64_t moe_buf_size = static_cast<int64_t>(args.get_uint64("moe_buf_size"));
int kname = args.get_int("kname");
int warmup = args.get_int("warmup");
int repeat = args.get_int("repeat");
#if MOE_SORTING_FMOE_2D_BUF
int moe_buf_interm_dim = args.get_int("moe_buf_interm_dim");
int moe_buf_elem_bytes = args.get_int("moe_buf_elem_bytes");
#else
int64_t moe_buf_size = static_cast<int64_t>(args.get_uint64("moe_buf_size"));
#endif
int kname = args.get_int("kname");
int warmup = args.get_int("warmup");
int repeat = args.get_int("repeat");
bool clear_inside = args.get_int("ci") != 0;
int dispatch_policy = args.get_int("dispatch");
int max_output_ids =
ck_tile::integer_least_multiple(topk * tokens + num_experts * unit_size - topk, unit_size);
@@ -149,11 +169,26 @@ bool test_moe_sorting(ck_tile::ArgParser args)
ck_tile::HostTensor<IndexType> sorted_ids_host({max_output_ids}, {1});
ck_tile::HostTensor<WeightType> sorted_weights_host({max_output_ids}, {1});
ck_tile::HostTensor<IndexType> sorted_expert_ids_host({max_output_ids / unit_size}, {1});
ck_tile::HostTensor<IndexType> sorted_id_cnt_host({1}, {1});
// for simplicity, below buffer allocate 2 dword
ck_tile::HostTensor<IndexType> sorted_id_cnt_host({2}, {1});
#if MOE_SORTING_FMOE_2D_BUF
ck_tile::HostTensor<int8_t> moe_buf_host(
{static_cast<std::size_t>(is_local_token ? local_tokens : tokens) * moe_buf_interm_dim *
moe_buf_elem_bytes});
auto moe_buf_bytes = moe_buf_interm_dim == 0 ? static_cast<std::size_t>(0)
: moe_buf_host.get_element_space_size_in_bytes();
#else
ck_tile::HostTensor<float> moe_buf_host({moe_buf_size});
auto moe_buf_bytes = moe_buf_size == 0 ? static_cast<std::size_t>(0)
: moe_buf_host.get_element_space_size_in_bytes();
#endif
ck_tile::FillUniformDistribution<WeightType>{-.5f, .5f}(weights_host);
#if MOE_SORTING_FMOE_2D_BUF
ck_tile::FillUniformDistribution<int8_t>{-.5f, .5f}(moe_buf_host);
#else
ck_tile::FillUniformDistribution<WeightType>{-.5f, .5f}(moe_buf_host);
#endif
topid_unique_gen<IndexType>(topk_ids_host.mData, tokens, topk, num_experts, seed);
ck_tile::DeviceMem topk_ids_dev(topk_ids_host.get_element_space_size_in_bytes());
@@ -176,7 +211,7 @@ bool test_moe_sorting(ck_tile::ArgParser args)
topk_ids_dev.ToDevice(topk_ids_host.data());
weights_dev.ToDevice(weights_host.data());
if(moe_buf_size > 0)
if(moe_buf_bytes > 0)
{
moe_buf_dev.ToDevice(moe_buf_host.data());
}
@@ -184,29 +219,31 @@ bool test_moe_sorting(ck_tile::ArgParser args)
local_expert_masking_dev.ToDevice(local_expert_masking_host.data());
// if return zero, means no need workspace, can set moe_sorting_args.p_ws to nullptr
ck_tile::index_t workspace_size = moe_sorting_get_workspace_size(tokens, num_experts, topk);
ck_tile::index_t workspace_size =
moe_sorting_get_workspace_size(tokens, num_experts, topk, dispatch_policy);
ck_tile::DeviceMem moe_sorting_ws(workspace_size != 0 ? workspace_size : 0);
if(workspace_size != 0)
if(workspace_size != 0 && clear_inside == false)
moe_sorting_ws.SetZero(); // note, clear here!!!!
moe_sorting_trait trait{index_prec, weight_prec, local_expert_masking};
moe_sorting_trait trait{
index_prec, weight_prec, local_expert_masking, clear_inside, dispatch_policy};
moe_sorting_args karg{topk_ids_dev.GetDeviceBuffer(),
weights_dev.GetDeviceBuffer(),
local_expert_masking ? local_expert_masking_dev.GetDeviceBuffer()
: nullptr,
is_local_token ? local_tokens_dev.GetDeviceBuffer() : nullptr,
sorted_ids_dev.GetDeviceBuffer(),
sorted_weights_dev.GetDeviceBuffer(),
sorted_expert_ids_dev.GetDeviceBuffer(),
sorted_id_cnt_dev.GetDeviceBuffer(),
moe_buf_size > 0 ? moe_buf_dev.GetDeviceBuffer() : nullptr,
workspace_size != 0 ? moe_sorting_ws.GetDeviceBuffer() : nullptr,
tokens,
unit_size,
num_experts,
topk,
static_cast<ck_tile::long_index_t>(moe_buf_size * sizeof(float))};
moe_sorting_args karg
{
topk_ids_dev.GetDeviceBuffer(), weights_dev.GetDeviceBuffer(),
local_expert_masking ? local_expert_masking_dev.GetDeviceBuffer() : nullptr,
is_local_token ? local_tokens_dev.GetDeviceBuffer() : nullptr,
sorted_ids_dev.GetDeviceBuffer(), sorted_weights_dev.GetDeviceBuffer(),
sorted_expert_ids_dev.GetDeviceBuffer(), sorted_id_cnt_dev.GetDeviceBuffer(),
moe_buf_bytes > 0 ? moe_buf_dev.GetDeviceBuffer() : nullptr,
workspace_size != 0 ? moe_sorting_ws.GetDeviceBuffer() : nullptr, tokens, unit_size,
num_experts, topk,
#if MOE_SORTING_FMOE_2D_BUF
moe_buf_interm_dim, moe_buf_elem_bytes
#else
static_cast<ck_tile::long_index_t>(moe_buf_size * sizeof(float))
#endif
};
ck_tile::stream_config sc{nullptr,
true,
@@ -219,7 +256,7 @@ bool test_moe_sorting(ck_tile::ArgParser args)
#if 0
{
ck_tile::HostTensor<char> ws_host({workspace_size}, {1});
ck_tile::HostTensor<char> ws_host({workspace_size}, {1});
moe_sorting_ws.FromDevice(ws_host.data());
int * p_mesh = reinterpret_cast<int*>(ws_host.data());
@@ -268,7 +305,12 @@ bool test_moe_sorting(ck_tile::ArgParser args)
}
#endif
printf("[%s|%s]tokens:%d", index_prec.c_str(), weight_prec.c_str(), tokens);
printf("[%s|%s|%s|%d]tokens:%d",
index_prec.c_str(),
weight_prec.c_str(),
workspace_size == 0 ? "cx" : (clear_inside ? "ci" : "co"),
dispatch_policy,
tokens);
if(is_local_token)
{
printf("(%d)", local_tokens);
@@ -280,6 +322,19 @@ bool test_moe_sorting(ck_tile::ArgParser args)
printf("local_eid:%s, ", args.get_str("local_eid").c_str());
}
if(moe_buf_bytes > 0)
{
#if MOE_SORTING_FMOE_2D_BUF
printf("moe_buf:%lu(%d,%d), ",
static_cast<uint64_t>(moe_buf_bytes),
moe_buf_interm_dim,
moe_buf_elem_bytes);
#else
printf("moe_buf:%lu, ", static_cast<uint64_t>(moe_buf_bytes));
#endif
}
if(ms < 0)
printf("not supported\n");
else
@@ -294,7 +349,7 @@ bool test_moe_sorting(ck_tile::ArgParser args)
sorted_weights_dev.FromDevice(sorted_weights_host.data());
sorted_expert_ids_dev.FromDevice(sorted_expert_ids_host.data());
sorted_id_cnt_dev.FromDevice(sorted_id_cnt_host.data());
if(moe_buf_size > 0)
if(moe_buf_bytes > 0)
{
moe_buf_dev.FromDevice(moe_buf_host.data());
}
@@ -340,6 +395,16 @@ bool test_moe_sorting(ck_tile::ArgParser args)
std::string("OUT Error: Incorrect eid!"),
1e-6,
1e-6);
// if(is_local_token)
{
auto t_ = is_local_token ? local_tokens : tokens;
bool _f = t_ == sorted_id_cnt_host.mData[1];
rtn &= _f;
if(!_f)
{
printf("not equal token buffer pad %d(%d)\n", t_, sorted_id_cnt_host.mData[1]);
}
}
}
else
{
@@ -347,9 +412,13 @@ bool test_moe_sorting(ck_tile::ArgParser args)
rtn = false;
}
if(moe_buf_size)
if(moe_buf_bytes)
{
#if MOE_SORTING_FMOE_2D_BUF
ck_tile::HostTensor<int8_t> moe_buf_ref({moe_buf_bytes});
#else
ck_tile::HostTensor<WeightType> moe_buf_ref({moe_buf_size});
#endif
rtn &= ck_tile::check_err(
moe_buf_host, moe_buf_ref, std::string("OUT Error: Incorrect zero buf!"), 0, 0);
}

View File

@@ -175,7 +175,7 @@ float moe_sorting(moe_sorting_trait t, moe_sorting_args a, ck_tile::stream_confi
}
}
#else
if(moe_sorting_get_workspace_size(a.tokens, a.num_experts, a.topk) != 0)
if(moe_sorting_get_workspace_size(a.tokens, a.num_experts, a.topk, t.dispatch_policy) != 0)
{
return moe_sorting_mp(t, a, s);
}
@@ -293,6 +293,7 @@ float moe_sorting(moe_sorting_trait t, moe_sorting_args a, ck_tile::stream_confi
{ \
float ave_time = \
ck_tile::launch_kernel(s, \
maybe_clear_workspace, \
MOE_SORTING_MP_0(mesh_type_, token_vec_0_, true, true), \
MOE_SORTING_MP_1(mesh_type_, token_vec_1_, true, true), \
MOE_SORTING_MP_23(mesh_type_, token_vec_23_, true, true)); \
@@ -302,6 +303,7 @@ float moe_sorting(moe_sorting_trait t, moe_sorting_args a, ck_tile::stream_confi
{ \
float ave_time = \
ck_tile::launch_kernel(s, \
maybe_clear_workspace, \
MOE_SORTING_MP_0(mesh_type_, token_vec_0_, true, false), \
MOE_SORTING_MP_1(mesh_type_, token_vec_1_, true, false), \
MOE_SORTING_MP_23(mesh_type_, token_vec_23_, true, false)); \
@@ -314,6 +316,7 @@ float moe_sorting(moe_sorting_trait t, moe_sorting_args a, ck_tile::stream_confi
{ \
float ave_time = \
ck_tile::launch_kernel(s, \
maybe_clear_workspace, \
MOE_SORTING_MP_0(mesh_type_, token_vec_0_, false, true), \
MOE_SORTING_MP_1(mesh_type_, token_vec_1_, false, true), \
MOE_SORTING_MP_23(mesh_type_, token_vec_23_, false, true)); \
@@ -323,6 +326,7 @@ float moe_sorting(moe_sorting_trait t, moe_sorting_args a, ck_tile::stream_confi
{ \
float ave_time = ck_tile::launch_kernel( \
s, \
maybe_clear_workspace, \
MOE_SORTING_MP_0(mesh_type_, token_vec_0_, false, false), \
MOE_SORTING_MP_1(mesh_type_, token_vec_1_, false, false), \
MOE_SORTING_MP_23(mesh_type_, token_vec_23_, false, false)); \
@@ -330,6 +334,17 @@ float moe_sorting(moe_sorting_trait t, moe_sorting_args a, ck_tile::stream_confi
} \
}
#define MOR_SORTING_CLEAR_WS_DISPATCH_(is_local_token_, block_size_, occu_) \
[&]() { \
using problem_ = \
ck_tile::MoeSortingClearWorkspaceProblem<is_local_token_, block_size_, occu_>; \
using kernel = ck_tile::MoeSortingClearWorkspaceKernel<problem_>; \
auto kargs = kernel::MakeKargs(a); \
const dim3 grids = kernel::GridSize(a); \
const dim3 blocks = kernel::BlockSize(a); \
return ck_tile::make_kernel<kernel::BLOCK_SIZE>(kernel{}, grids, blocks, 0, kargs); \
}()
float moe_sorting_mp(moe_sorting_trait t, moe_sorting_args a, ck_tile::stream_config s)
{
bool is_local_token = a.p_local_tokens != nullptr;
@@ -338,6 +353,22 @@ float moe_sorting_mp(moe_sorting_trait t, moe_sorting_args a, ck_tile::stream_co
using ms_index_t = ck_tile::index_t;
using ms_weight_type = float;
auto maybe_clear_workspace = [=](const ck_tile::stream_config& s_) {
if(t.clear_workspace_inside_api)
{
if(is_local_token)
{
auto k = MOR_SORTING_CLEAR_WS_DISPATCH_(true, 1024, 1);
k(s_);
}
else
{
auto k = MOR_SORTING_CLEAR_WS_DISPATCH_(false, 1024, 1);
k(s_);
}
}
};
if(ck_tile::impl::moe_sorting_get_smem_size_p23(a.num_experts) >
ck_tile::get_smem_capacity())
{
@@ -345,6 +376,7 @@ float moe_sorting_mp(moe_sorting_trait t, moe_sorting_args a, ck_tile::stream_co
if(t.local_expert_masking)
{
float ave_time = ck_tile::launch_kernel(s,
maybe_clear_workspace,
MOE_SORTING_MP_0(ms_index_t, 1, true),
MOE_SORTING_MP_1(ms_index_t, 1, true),
MOE_SORTING_MP_2(ms_index_t, 1, true),
@@ -354,6 +386,7 @@ float moe_sorting_mp(moe_sorting_trait t, moe_sorting_args a, ck_tile::stream_co
else
{
float ave_time = ck_tile::launch_kernel(s,
maybe_clear_workspace,
MOE_SORTING_MP_0(ms_index_t, 1, false),
MOE_SORTING_MP_1(ms_index_t, 1, false),
MOE_SORTING_MP_2(ms_index_t, 1, false),
@@ -405,7 +438,7 @@ float moe_sorting_mp(moe_sorting_trait t, moe_sorting_args a, ck_tile::stream_co
return -1;
}
int moe_sorting_get_workspace_size(int tokens, int num_experts, int topk)
int moe_sorting_get_workspace_size(int tokens, int num_experts, int topk, int dispatch_policy)
{
return ck_tile::moe_sorting_get_workspace_size(tokens, num_experts, topk);
return ck_tile::moe_sorting_get_workspace_size(tokens, num_experts, topk, dispatch_policy);
}

View File

@@ -10,8 +10,14 @@
struct moe_sorting_trait
{
std::string index_type;
std::string weight_type; // currently always float
bool local_expert_masking; // if mask experts as local expert
std::string weight_type; // currently always float
bool local_expert_masking; // if mask experts as local expert
bool clear_workspace_inside_api; // if true, no need clear workspace outsize (will take care of
// it inside API)
int dispatch_policy; // 0 - let the API choose kernel for you. 1 - always use single kerenl. 2 -
// always use mp kernel NOTE: moe_sorting_get_workspace_size() need use
// same dispatch_policy value. it will be undefined behavior if ppl using
// different value when get ws and call the kernel
};
struct moe_sorting_args : public ck_tile::MoeSortingHostArgs
@@ -22,6 +28,6 @@ struct moe_sorting_args : public ck_tile::MoeSortingHostArgs
// if return non zero, means need workspace, you need to allocate a GPU buffer
// and set to moe_sorting_args.p_ws
// NOTE: workspace size are required to clear zero before use the API
int moe_sorting_get_workspace_size(int tokens, int num_experts, int topk);
int moe_sorting_get_workspace_size(int tokens, int num_experts, int topk, int dispatch_policy);
float moe_sorting(moe_sorting_trait t, moe_sorting_args a, ck_tile::stream_config s);
float moe_sorting_mp(moe_sorting_trait t, moe_sorting_args a, ck_tile::stream_config s);

View File

@@ -1,7 +1,9 @@
# #!/bin/sh
EXE=./build/bin/tile_example_moe_sorting
MOE_BUF="12"
if [ "x$MOE_BUF" = "x1" ] ; then
$EXE -t=80 -e=17 -moe_buf_size=16
$EXE -t=111 -e=117 -moe_buf_size=4
$EXE -t=1000 -e=55 -moe_buf_size=1024
@@ -42,3 +44,46 @@ $EXE -t=23 -local_t=9 -e=1 -k=1
$EXE -t=7 -local_t=0 -e=89 -k=1 -local_eid=0,8,12,33
$EXE -t=61 -local_t=0 -e=333 -k=99 -local_eid=0,8,12,33
$EXE -t=133940 -local_t=111921 -e=256 -k=17 -moe_buf_size=133940
else
$EXE -t=80 -e=17 -moe_buf_interm_dim=16 -moe_buf_elem_bytes=4
$EXE -t=111 -e=117 -moe_buf_interm_dim=4 -moe_buf_elem_bytes=4
$EXE -t=1000 -e=55 -moe_buf_interm_dim=1024 -moe_buf_elem_bytes=1
$EXE -t=99 -e=120 -moe_buf_interm_dim=10244 -moe_buf_elem_bytes=2
$EXE -t=175 -e=64 -k=8
$EXE -t=65 -e=8 -k=2
$EXE -t=1 -e=25
$EXE -t=31 -e=19 -k=15
$EXE -t=81 -e=37 -k=7
$EXE -t=23 -e=1 -k=1
$EXE -t=127 -e=99 -k=19
$EXE -t=71 -e=11 -k=11
$EXE -t=1 -e=1 -k=1
$EXE -t=99 -e=2 -k=1
$EXE -t=333 -e=99 -k=13
$EXE -t=11 -e=256 -k=5
$EXE -t=64 -e=455 -k=8
$EXE -t=777 -e=802 -k=99
$EXE -t=4097 -e=906 -k=51
$EXE -t=128 -e=32 -k=5 -local_t=6 -moe_buf_interm_dim=262144
$EXE -t=13 -e=64 -k=3 -local_eid=4,5,6,7,8,9,10,11
$EXE -t=99 -e=33 -k=9 -local_eid=6,10,11,15,19
$EXE -t=80 -e=99 -k=10 -local_eid=0,8,12,33
$EXE -t=11 -e=256 -k=5 -local_eid=99,110,129
$EXE -t=128 -e=128 -k=6 -moe_buf_interm_dim=163840 -moe_buf_elem_bytes=1
$EXE -t=8192 -e=32 -k=5 -local_t=11 -moe_buf_interm_dim=163840
$EXE -t=8192 -e=32 -k=8 -local_t=12 -moe_buf_interm_dim=163840 -moe_buf_elem_bytes=1
$EXE -t=8192 -e=256 -k=5 -local_t=13 -moe_buf_interm_dim=163840
$EXE -t=8192 -e=256 -k=8 -local_t=8 -moe_buf_interm_dim=163840
$EXE -t=163840 -e=256 -k=8 -local_t=4 -moe_buf_interm_dim=163840 -moe_buf_elem_bytes=4
$EXE -t=12 -local_t=3 -e=256 -k=5 -local_eid=9,10,199,145
$EXE -t=67 -local_t=9 -e=555 -k=5 -local_eid=19,23,24,25,26,99
$EXE -t=99 -local_t=93 -e=121 -local_t=4 -moe_buf_interm_dim=10244
$EXE -t=536 -local_t=345 -e=802 -k=99
$EXE -t=331 -local_t=39 -e=83 -k=33
$EXE -t=765 -local_t=654 -e=783 -k=8
$EXE -t=23 -local_t=9 -e=1 -k=1
$EXE -t=7 -local_t=0 -e=89 -k=1 -local_eid=0,8,12,33
$EXE -t=61 -local_t=0 -e=333 -k=99 -local_eid=0,8,12,33
$EXE -t=133940 -local_t=111921 -e=256 -k=17 -local_t=2 -moe_buf_interm_dim=133940 -moe_buf_elem_bytes=1
fi

View File

@@ -6,7 +6,8 @@
int fused_moe_get_workspace_size(int tokens, int num_experts, int topk)
{
return ck_tile::moe_sorting_get_workspace_size(tokens, num_experts, topk);
return ck_tile::moe_sorting_get_workspace_size(
tokens, num_experts, topk, 0 /*dispatch policy*/);
}
float fused_moe(fused_moe_traits t, fused_moe_args a, const ck_tile::stream_config& s)
@@ -24,23 +25,28 @@ float fused_moe(fused_moe_traits t, fused_moe_args a, const ck_tile::stream_conf
}();
auto t0 = fused_moesorting_trait{"int32", "fp32", t.local_expert_masking};
auto a0 = fused_moesorting_args{
a.topk_ids_ptr, // const void* p_topk_ids;
a.topk_weight_ptr, // const void* p_weights;
a.local_expert_mask_ptr, // const void* p_local_expert_mask;
a.local_tokens,
a.sorted_token_ids_ptr, // void* p_sorted_token_ids;
a.sorted_weight_ptr, // void* p_sorted_weights;
a.sorted_expert_ids_ptr, // void* p_sorted_expert_ids;
a.num_sorted_tiles_ptr, // void* p_total_tokens_post_pad;
a.o_ptr, // void* p_moe_buf;
a.ws_ptr, // void* p_ws;
a.num_tokens, // index_t tokens;
a.block_m, // index_t unit_size;
a.num_experts, // index_t num_experts;
a.topk, // index_t topk;
static_cast<ck_tile::long_index_t>(a.num_tokens) * a.stride_token *
o_data_bytes // index_t moe_buf_bytes;
auto a0 = fused_moesorting_args
{
a.topk_ids_ptr, // const void* p_topk_ids;
a.topk_weight_ptr, // const void* p_weights;
a.local_expert_mask_ptr, // const void* p_local_expert_mask;
a.local_tokens,
a.sorted_token_ids_ptr, // void* p_sorted_token_ids;
a.sorted_weight_ptr, // void* p_sorted_weights;
a.sorted_expert_ids_ptr, // void* p_sorted_expert_ids;
a.num_sorted_tiles_ptr, // void* p_total_tokens_post_pad;
a.o_ptr, // void* p_moe_buf;
a.ws_ptr, // void* p_ws;
a.num_tokens, // index_t tokens;
a.block_m, // index_t unit_size;
a.num_experts, // index_t num_experts;
a.topk, // index_t topk;
#if MOE_SORTING_FMOE_2D_BUF
a.stride_token, o_data_bytes,
#else
static_cast<ck_tile::long_index_t>(a.num_tokens) *
a.stride_token* o_data_bytes // index_t moe_buf_bytes;
#endif
};
auto t1 = fused_moegemm_traits{t.prec_i,

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@@ -413,5 +413,6 @@ float fused_moesorting_mp(fused_moesorting_trait t,
int fused_moesorting_get_workspace_size(int tokens, int num_experts, int topk)
{
return ck_tile::moe_sorting_get_workspace_size(tokens, num_experts, topk);
return ck_tile::moe_sorting_get_workspace_size(
tokens, num_experts, topk, 0 /*dispatch policy*/);
}

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@@ -399,7 +399,7 @@ bool run(const ck_tile::ArgParser& arg_parser)
// if return zero, means no need workspace, can set moe_sorting_args.p_ws to nullptr
ck_tile::index_t workspace_size =
ck_tile::moe_sorting_get_workspace_size(tokens, experts, topk);
ck_tile::moe_sorting_get_workspace_size(tokens, experts, topk, 0 /*dispatch_policy*/);
ck_tile::DeviceMem moe_sorting_ws(workspace_size != 0 ? workspace_size : 0);
if(workspace_size != 0)
moe_sorting_ws.SetZero(); // note, clear here!!!!