Re: [PATCH v4 bpf-next 6/6] bpf: runqslower: use task local storage

From: Martin KaFai Lau
Date: Tue Feb 23 2021 - 16:35:08 EST

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On Mon, Feb 22, 2021 at 05:20:14PM -0800, Song Liu wrote:
> Replace hashtab with task local storage in runqslower. This improves the
> performance of these BPF programs. The following table summarizes average
> runtime of these programs, in nanoseconds:
>
> task-local hash-prealloc hash-no-prealloc
> handle__sched_wakeup 125 340 3124
> handle__sched_wakeup_new 2812 1510 2998
> handle__sched_switch 151 208 991
Nice! The required code change is also minimal.

Next message: Jarkko Sakkinen: "[PATCH v2] x86/sgx: Add a basic NUMA allocation scheme to sgx_alloc_epc_page()"
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In reply to: Song Liu: "[PATCH v4 bpf-next 6/6] bpf: runqslower: use task local storage"
Next in thread: Song Liu: "[PATCH v4 bpf-next 4/6] selftests/bpf: test deadlock from recursive bpf_task_storage_[get|delete]"
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