Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO

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To: Kent Overstreet <kent.overstreet@xxxxxxxxx>
Subject: Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO
From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 27 Feb 2024 09:07:01 -0800
Cc: Al Viro <viro@xxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Luis Chamberlain <mcgrof@xxxxxxxxxx>, lsf-pc@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-mm <linux-mm@xxxxxxxxx>, Daniel Gomez <da.gomez@xxxxxxxxxxx>, Pankaj Raghav <p.raghav@xxxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Chris Mason <clm@xxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>
In-reply-to: <hnmf36wwh3yahmcyqlbgnhidcsgmfg4jnat2n6m2dxz655cxt7@gm7qddu2cshm>
References: <Zduto30LUEqIHg4h@casper.infradead.org> <CAHk-=wibYaWYqs5A30a7ywJdsW5LDT1LYysjcCmzjzkK=uh+tQ@mail.gmail.com> <bk45mgxpdbm5gfa6wl37nhecttnb5bxh6wo3slixsray77azu5@pi3bblfn3c5u> <CAHk-=wjnW96+oP0zhEd1zjPNqOHvrddKkwp0+CuS5HpZavfmMQ@mail.gmail.com> <Zdv8dujdOg0dD53k@duke.home> <CAHk-=wiEVcqTU1oQPSjaJvxj5NReg3GzkBO8zpL1tXFG1UVyvg@mail.gmail.com> <CAHk-=wjOogaW0yLoUqQ0WfQ=etPA4cOFLy56VYCnHVU_DOMLrg@mail.gmail.com> <CAHk-=whFzKO+Vx2f8h72m7ysiEP2Thubp3EaZPa7kuoJb0k=ig@mail.gmail.com> <yfzkhghkh36ww5nzmkdrdpcjy6w5v6us55ccmnh2phjla25mmz@xomuheona22l> <CAHk-=wjRXSvwq70=G3gDPoaxd3R0PDOnYj7fxOhZ=esiNjFvrA@mail.gmail.com> <hnmf36wwh3yahmcyqlbgnhidcsgmfg4jnat2n6m2dxz655cxt7@gm7qddu2cshm>

On Tue, 27 Feb 2024 at 08:47, Kent Overstreet <kent.overstreet@xxxxxxxxx> wrote:
>
> Like I replied to willy - the "4k" was a typo from force of habit, I was
> doing 64 byte random reads.

Ok, can you send the exact fio command? I'll do some testing here too.

                  Linus

Follow-Ups:
- Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO
  - From: Kent Overstreet

References:
- Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO
  - From: Matthew Wilcox
- Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO
  - From: Linus Torvalds
- Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO
  - From: Kent Overstreet
- Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO
  - From: Linus Torvalds
- Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO
  - From: Al Viro
- Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO
  - From: Linus Torvalds
- Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO
  - From: Linus Torvalds
- Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO
  - From: Linus Torvalds
- Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO
  - From: Kent Overstreet
- Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO
  - From: Linus Torvalds
- Re: [LSF/MM/BPF TOPIC] Measuring limits and enhancing buffered IO
  - From: Kent Overstreet

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