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Re: Performance improvement with 58a2e3f5c37be02dac3086b81bdda9414b931ed


From: Stefan Hajnoczi
Subject: Re: Performance improvement with 58a2e3f5c37be02dac3086b81bdda9414b931edf
Date: Tue, 16 May 2023 09:19:10 -0400

On Tue, 16 May 2023 at 08:56, Lukáš Doktor <ldoktor@redhat.com> wrote:
>
> Hello Stefan, folks,
>
> the perf-ci detected and bisected the 58a2e3f5c37 - block: compile out 
> assert_bdrv_graph_readable() by default - as a performance improvement 
> especially with 4K reads with multiple jobs (but minor improvements were 
> observed in other variants)
>
>     
> https://ldoktor.github.io/tmp/RedHat-virtlab722/v8.0.0/140-improvement.html

Thanks, that's good to know. How much improvement was there? I don't
understand how to read the report that you linked to.

Stefan

>
> Based on the commit message I guess it's expected so take this just as a 
> record of improvement.
>
> Regards,
> Lukáš
>
> PS: The list of perf-ci issues is available here: 
> https://docs.google.com/spreadsheets/d/1HEXI5wDsNgAIgXl5MIhGond898Vz5A1Hrkl0lZmWEbg/edit#gid=0



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