[SYCL] Support limit max alloc memory within 2GB for host-pinned memory - #27559
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arthw wants to merge 1 commit into
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[SYCL] Support limit max alloc memory within 2GB for host-pinned memory#27559arthw wants to merge 1 commit into
arthw wants to merge 1 commit into
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Overview
It's fix the issue: #27038
Additional information
Define env var: GGML_SYCL_HOST_PINNED_MEM_2G to control this feature, default is close.
Limit the max alloc memory within 2GB can on linux results in no additional CPU utilization during DMA. USM allocations above 2 GiB take the relaxed/large-allocation path, which serializes H2D copies with compute and prevents copy/compute overlap.
It will impact the startup time. Need more test.
Requirements