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[CPU] Support FP8 KV cache (#14741)

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Signed-off-by: jiang1.li <jiang1.li@intel.com>
This commit is contained in:
Li, Jiang
2025-03-15 13:07:36 +08:00
committed by GitHub
parent 877e352262
commit a2ae496589
8 changed files with 122 additions and 36 deletions
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38
csrc/cpu/cache.cpp
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@@ -3,6 +3,12 @@
#include "cpu_types.hpp"
#if defined(__x86_64__)
#define DISPATCH_MACRO VLLM_DISPATCH_FLOATING_TYPES_WITH_E5M2
#else
#define DISPATCH_MACRO VLLM_DISPATCH_FLOATING_TYPES
#endif
namespace {
template <typename scalar_t>
void copy_blocks_cpu_impl(std::vector<torch::Tensor> const& key_caches,
@@ -95,13 +101,12 @@ void copy_blocks(std::vector<torch::Tensor> const& key_caches,
}
const int element_num_per_block = key_caches[0][0].numel();
VLLM_DISPATCH_FLOATING_TYPES(
key_caches[0].scalar_type(), "copy_blocks_cpu_impl", [&] {
CPU_KERNEL_GUARD_IN(copy_blocks_cpu_impl)
copy_blocks_cpu_impl<scalar_t>(key_caches, value_caches, block_mapping,
element_num_per_block, num_layers);
CPU_KERNEL_GUARD_OUT(copy_blocks_cpu_impl)
});
DISPATCH_MACRO(key_caches[0].scalar_type(), "copy_blocks_cpu_impl", [&] {
CPU_KERNEL_GUARD_IN(copy_blocks_cpu_impl)
copy_blocks_cpu_impl<scalar_t>(key_caches, value_caches, block_mapping,
element_num_per_block, num_layers);
CPU_KERNEL_GUARD_OUT(copy_blocks_cpu_impl)
});
}
void reshape_and_cache(torch::Tensor& key, torch::Tensor& value,
@@ -118,16 +123,15 @@ void reshape_and_cache(torch::Tensor& key, torch::Tensor& value,
int key_stride = key.stride(0);
int value_stride = value.stride(0);
VLLM_DISPATCH_FLOATING_TYPES(
key.scalar_type(), "reshape_and_cache_cpu_impl", [&] {
CPU_KERNEL_GUARD_IN(reshape_and_cache_cpu_impl)
reshape_and_cache_cpu_impl<scalar_t>(
key.data_ptr<scalar_t>(), value.data_ptr<scalar_t>(),
key_cache.data_ptr<scalar_t>(), value_cache.data_ptr<scalar_t>(),
slot_mapping.data_ptr<int64_t>(), num_tokens, key_stride,
value_stride, num_heads, head_size, block_size, x);
CPU_KERNEL_GUARD_OUT(reshape_and_cache_cpu_impl)
});
DISPATCH_MACRO(key.scalar_type(), "reshape_and_cache_cpu_impl", [&] {
CPU_KERNEL_GUARD_IN(reshape_and_cache_cpu_impl)
reshape_and_cache_cpu_impl<scalar_t>(
key.data_ptr<scalar_t>(), value.data_ptr<scalar_t>(),
key_cache.data_ptr<scalar_t>(), value_cache.data_ptr<scalar_t>(),
slot_mapping.data_ptr<int64_t>(), num_tokens, key_stride, value_stride,
num_heads, head_size, block_size, x);
CPU_KERNEL_GUARD_OUT(reshape_and_cache_cpu_impl)
});
}
void swap_blocks(torch::Tensor& src, torch::Tensor& dst,