From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
To: richard.henderson@linaro.org
Cc: qemu-devel@nongnu.org, jmario@redhat.com
Subject: Prefetches in buffer_zero_*
Date: Thu, 22 Jul 2021 11:02:14 +0100 [thread overview]
Message-ID: <YPlCJpMIOb2Umc+Z@work-vm> (raw)
Hi Richard,
I think you were the last person to fiddle with the prefetching
in buffer_zero_avx2 and friends; Joe (cc'd) wondered if explicit
prefetching still made sense on modern CPUs, and that their hardware
generally figures stuff out better on simple increments.
What was your thinking on this, and did you actually measure
any improvement?
Dave
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
next reply other threads:[~2021-07-22 10:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-22 10:02 Dr. David Alan Gilbert [this message]
2021-07-22 18:53 ` Prefetches in buffer_zero_* Richard Henderson
2021-07-22 19:13 ` Dr. David Alan Gilbert
2021-07-24 1:43 ` Joe Mario
2021-07-26 8:47 ` Dr. David Alan Gilbert
2021-07-26 11:31 ` Philippe Mathieu-Daudé
2021-07-26 12:07 ` Dr. David Alan Gilbert
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