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too many cpu cost in single_level::LocalQueue::pop #80

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guoxiangCN opened this issue Jun 30, 2023 · 0 comments
Open

too many cpu cost in single_level::LocalQueue::pop #80

guoxiangCN opened this issue Jun 30, 2023 · 0 comments

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@guoxiangCN
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guoxiangCN commented Jun 30, 2023 •
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here is an flame graph of tikv (storage-work-pool) when bench, i found around 15% cpu of all tikv cost in single_level::LocalQueue::pop
image

The call stack points to the crossbeam_ Epoch, this seems to be due to the overhead of an lock-free data structure. But I'm not sure if this is normal
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