linux-kernel - Re: [PATCH v3 00/35] Per-VMA locks

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Message-ID: <20230227165032.taj24j4leu7dlbqc@offworld>
Date:   Mon, 27 Feb 2023 08:50:32 -0800
From:   Davidlohr Bueso <dave@...olabs.net>
To:     freak07 <michalechner92@...glemail.com>
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Subject: Re: [PATCH v3 00/35] Per-VMA locks

On Fri, 24 Feb 2023, freak07 wrote:

>Here are some measurements from a Pixel 7 Pro that´s running a kernel either with the Per-VMA locks patchset or without.
>If there´s interest I can provide results of other specific apps as well.
>
>Results are from consecutive cold app launches issued with "am start" command spawning the main activity of Slack Android app.
>
>https://docs.google.com/spreadsheets/d/1ktujfcyDmIJoQMWsoizGIE-0A_jMS9VMw_seehUY9s0/edit?usp=sharing
>
>There´s quite a noticeable improvement, as can be seen in the graph. The results were reproducible.

Thanks for sharing. I am not surprised - after all, per-vma locks narrow some of the performance gaps
between vanilla and speculative pfs, with less complexity (albeit this is now a 35 patch series :).

Thanks,
Davidlohr