linux-kernel - Re: [RFC 00/11] optimise registered buffer/file updates

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Message-ID: <87h6u111te.fsf@suse.de>
Date:   Fri, 31 Mar 2023 10:35:09 -0300
From:   Gabriel Krisman Bertazi <krisman@...e.de>
To:     Pavel Begunkov <asml.silence@...il.com>
Cc:     io-uring@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC 00/11] optimise registered buffer/file updates


Pavel,

Pavel Begunkov <asml.silence@...il.com> writes:
> Updating registered files and buffers is a very slow operation, which
> makes it not feasible for workloads with medium update frequencies.
> Rework the underlying rsrc infra for greater performance and lesser
> memory footprint.
>
> The improvement is ~11x for a benchmark updating files in a loop
> (1040K -> 11468K updates / sec).

Nice. That's a really impressive improvement.

I've been adding io_uring test cases for automated performance
regression testing with mmtests (open source).  I'd love to take a look
at this test case and adapt it to mmtests, so we can pick it up and run
it frequently.

is it something you can share?

-- 
Gabriel Krisman Bertazi