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[ROCm] Raise HiCache JIT block quota for mapped-host throughput #39036

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Merged
HaiShaw merged 1 commit into from
Sep 11, 2026
+10 −2
Merged

[ROCm] Raise HiCache JIT block quota for mapped-host throughput #39036

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12 changes: 10 additions & 2 deletions python/sglang/kernels/ops/kvcache/hicache.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,14 +3,22 @@
import logging
from typing import TYPE_CHECKING

from sglang.kernels.jit.utils import cache_once, load_jit, make_cpp_args
from sglang.kernels.jit.utils import (
cache_once,
is_hip_runtime,
load_jit,
make_cpp_args,
)
from sglang.kernels.kernel_api_logging import debug_kernel_api

if TYPE_CHECKING:
import torch
from tvm_ffi.module import Module

DEFAULT_BLOCK_QUOTA = 2
_is_hip = is_hip_runtime()

# ROCm needs a wider grid to saturate mapped-host transfers; CUDA keeps the legacy quota.
DEFAULT_BLOCK_QUOTA = 32 if _is_hip else 2


@cache_once
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