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From: "bmerry at sarao dot ac.za" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug string/30994] REP MOVSB performance suffers from page aliasing on Zen 4
Date: Wed, 25 Oct 2023 13:37:58 +0000	[thread overview]
Message-ID: <bug-30994-131-k5ecE6bWSY@http.sourceware.org/bugzilla/> (raw)
In-Reply-To: <bug-30994-131@http.sourceware.org/bugzilla/>

https://sourceware.org/bugzilla/show_bug.cgi?id=30994

--- Comment #5 from Bruce Merry <bmerry at sarao dot ac.za> ---
FWIW, backwards REP MOVSB (std; rep movsb; cld) is still horribly slow on Zen 4
(4 GB/s even when the data is nicely aligned and cached).

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  parent reply	other threads:[~2023-10-25 13:37 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-24  6:18 [Bug string/30994] New: " bmerry at sarao dot ac.za
2023-10-24  6:19 ` [Bug string/30994] " bmerry at sarao dot ac.za
2023-10-24  6:20 ` bmerry at sarao dot ac.za
2023-10-24  6:21 ` bmerry at sarao dot ac.za
2023-10-24  6:21 ` bmerry at sarao dot ac.za
2023-10-24  6:32 ` bmerry at sarao dot ac.za
2023-10-24 17:57 ` sam at gentoo dot org
2023-10-25 12:40 ` fweimer at redhat dot com
2023-10-25 13:37 ` bmerry at sarao dot ac.za [this message]
2023-10-27 12:39 ` adhemerval.zanella at linaro dot org
2023-10-27 13:04 ` bmerry at sarao dot ac.za
2023-10-27 13:16 ` bmerry at sarao dot ac.za
2023-10-30  8:21 ` bmerry at sarao dot ac.za
2023-10-30 13:30 ` adhemerval.zanella at linaro dot org
2023-10-30 14:21 ` bmerry at sarao dot ac.za
2023-10-30 16:27 ` adhemerval.zanella at linaro dot org
2023-11-07 15:44 ` jamborm at gcc dot gnu.org
2023-11-29  3:08 ` lilydjwg at gmail dot com
2023-11-29 13:01 ` holger@applied-asynchrony.com
2023-11-29 15:57 ` jrmuizel at gmail dot com
2023-11-29 17:25 ` gabravier at gmail dot com
2023-11-29 17:30 ` sam at gentoo dot org
2023-11-29 19:58 ` matti.niemenmaa+sourcesbugs at iki dot fi
2023-11-29 21:08 ` pageexec at gmail dot com
2023-11-30  3:13 ` dushistov at mail dot ru
2023-12-08  8:32 ` mati865 at gmail dot com
2024-02-13 16:54 ` cvs-commit at gcc dot gnu.org
2024-04-04 10:36 ` cvs-commit at gcc dot gnu.org

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