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[Perf] Tune scaled_fp8_quant by increasing vectorization (#18844)

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Signed-off-by: mgoin <mgoin64@gmail.com>
This commit is contained in:
Michael Goin
2025-06-03 16:48:25 -04:00
committed by GitHub
parent bdf13965ab
commit e31446b6c8
4 changed files with 118 additions and 113 deletions
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23
csrc/quantization/vectorization.cuh
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@@ -10,23 +10,22 @@
namespace vllm {
// Vectorization containers
template <typename scalar_t>
struct __align__(8) vec4_t {
scalar_t x;
scalar_t y;
scalar_t z;
scalar_t w;
template <typename scalar_t, size_t vec_size>
struct __align__(vec_size * sizeof(scalar_t)) vec_n_t {
scalar_t val[vec_size];
};
template <typename quant_type_t>
struct __align__(4) q8x4_t {
template <typename quant_type_t, size_t vec_size>
struct __align__(vec_size * sizeof(quant_type_t)) q8_n_t {
static_assert(std::is_same_v<quant_type_t, int8_t> ||
std::is_same_v<quant_type_t, c10::Float8_e4m3fn> ||
std::is_same_v<quant_type_t, c10::Float8_e4m3fnuz>);
quant_type_t x;
quant_type_t y;
quant_type_t z;
quant_type_t w;
quant_type_t val[vec_size];
};
template <typename scalar_t>
using vec4_t = vec_n_t<scalar_t, 4>;
template <typename quant_type_t>
using q8x4_t = q8_n_t<quant_type_t, 4>;
} // namespace vllm