Re: CRC32C Parallel Computation Optimization on ARM
От | Nathan Bossart |
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Тема | Re: CRC32C Parallel Computation Optimization on ARM |
Дата | |
Msg-id | 20231024211806.GA919080@nathanxps13 обсуждение исходный текст |
Ответ на | Re: CRC32C Parallel Computation Optimization on ARM (Nathan Bossart <nathandbossart@gmail.com>) |
Ответы |
Re: CRC32C Parallel Computation Optimization on ARM
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Список | pgsql-hackers |
On Tue, Oct 24, 2023 at 04:09:54PM -0500, Nathan Bossart wrote: > I'm able to reproduce the speedup with the provided benchmark on an Apple > M1 Pro (which appears to have the required instructions). There was almost > no change for the 512-byte case, but there was a ~60% speedup for the > 4096-byte case. > > However, I couldn't produce any noticeable speedup with Heikki's pg_waldump > benchmark [0]. I haven't had a chance to dig further, unfortunately. > Assuming I'm not doing something wrong, I don't think such a result should > necessarily disqualify this optimization, though. Actually, since the pg_waldump benchmark likely only involves very small WAL records, it would make sense that there isn't much difference. *facepalm* -- Nathan Bossart Amazon Web Services: https://aws.amazon.com
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