Gahow Wang
445e491123
third_party/vllm/ now tracked in git for direct patch management.
Based on vLLM v0.18.1 release with one patch applied:
vllm/v1/core/sched/scheduler.py:
Replace fatal assert with graceful skip when KV transfer callback
arrives for an already-aborted request during PD disaggregated serving.
Future vLLM modifications should be made directly in third_party/vllm/
and committed normally. The patches/ directory is kept as documentation
of what changed from upstream.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
59 lines
1.8 KiB
Plaintext
59 lines
1.8 KiB
Plaintext
#pragma once
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/**
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* Quantization utilities including:
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* Adjusted maximum values for qtypes.
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* Minimum scaling factors for qtypes.
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*/
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#include <cmath>
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#include <torch/types.h>
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#ifndef USE_ROCM
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#include <c10/util/Float8_e4m3fn.h>
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#define MAYBE_HOST_DEVICE C10_HOST_DEVICE
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#else
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#include <ATen/hip/HIPContext.h>
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#include <c10/util/Float8_e4m3fn.h>
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#include <c10/util/Float8_e4m3fnuz.h>
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// ROCm doesn't seem to need C10_HOST_DEVICE for static constexpr
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#define MAYBE_HOST_DEVICE
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#endif
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template <typename T,
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typename = std::enable_if_t<std::is_same_v<T, c10::Float8_e4m3fn> ||
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std::is_same_v<T, c10::Float8_e4m3fnuz> ||
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std::is_same_v<T, int8_t>>>
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struct quant_type_max {
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static constexpr T val() { return std::numeric_limits<T>::max(); }
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};
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// Using the default max value from pytorch (240.0 0x7F) will cause accuracy
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// issues when running dynamic quantization. Here use 224.0 0x7E for rocm.
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template <>
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struct quant_type_max<c10::Float8_e4m3fnuz> {
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static constexpr c10::Float8_e4m3fnuz val() {
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return c10::Float8_e4m3fnuz(0x7E, c10::Float8_e4m3fnuz::from_bits());
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}
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};
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template <typename T>
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MAYBE_HOST_DEVICE static constexpr T quant_type_max_v =
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quant_type_max<T>::val();
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template <typename T,
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typename = std::enable_if_t<std::is_same_v<T, c10::Float8_e4m3fn> ||
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std::is_same_v<T, c10::Float8_e4m3fnuz> ||
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std::is_same_v<T, int8_t>>>
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struct min_scaling_factor {
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C10_DEVICE C10_ALWAYS_INLINE static float val() {
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return 1.0f / (quant_type_max_v<T> * 512.0f);
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}
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};
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template <>
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struct min_scaling_factor<int8_t> {
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C10_DEVICE C10_ALWAYS_INLINE static float val() {
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return std::numeric_limits<float>::epsilon();
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}
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}; |