rmuir commented on PR #12632: URL: https://github.com/apache/lucene/pull/12632#issuecomment-1772669239
also i think JMH is bad news when it comes to downclocking. It does not show the true performance impact of this. It slows down other things on the machine as well: the user might have other shit going on too. This is why the avx-512 variants of the functions avoid 512-bit multiply and just use 256-bit vectors for that part, it is the only safe approach. Unfortunately this approach is slightly suboptimal for your Rocket Lake which doesn't suffer from downclocking, but it is a disaster elsewhere, so we have to play it safe. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org
