From: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>
To: Richard Weinberger <richard.weinberger@gmail.com>
Cc: Richard Weinberger <richard@nod.at>,
"user-mode-linux-devel@lists.sourceforge.net"
<user-mode-linux-devel@lists.sourceforge.net>
Subject: Re: [uml-devel] [PATCH 2/2] Bulk IO Transaction support part 1
Date: Sun, 10 Jan 2016 16:36:45 +0000 [thread overview]
Message-ID: <5692889D.1030405@kot-begemot.co.uk> (raw)
In-Reply-To: <CAFLxGvzKv7jjiid8eKa5=-=PmS-mdWH=PZZsipXOvDG1r-SkWg@mail.gmail.com>
On 10/01/16 16:00, Richard Weinberger wrote:
> On Mon, Dec 21, 2015 at 8:04 PM, Anton Ivanov
> <anton.ivanov@kot-begemot.co.uk> wrote:
>> Hi list, hi Richard,
>>
>> This rather primitive patchset pushes disk IO by ~ 15%.
>>
>> dd to /dev/null on a host memory cached 16G sparse disk image with
>> ubuntu on it goes from 512MB/s on my machine to 580MB/s.
>>
>> Part 2 will be ring buffers and read/write poll loop in the io_thread as
>> well as elimination of "partial read/write" workarounds. While it does
>> not push disk benchmarks a lot it makes UML more responsive.
>>
>> Part 3 will be merging adjacent IO transactions (by file location) via
>> vector IO. This pushes trhoughput even further by quite a bit.
>>
>> While I can try to submit all of that in one go, I'd rather submit it in
>> chunks so it is easier to review even if this will result in patch churn
>> (the whole do_safe_read malarkey will bite the bullet once part 2 is out).
> Is this already stable enough for this merge window?
> At least checkpatch.pl dislikes part 1. :(
>
You can leave this one out. I will be working further on this to squeeze
~ 10% more and introduce vector IO.
A.
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next prev parent reply other threads:[~2016-01-10 16:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-21 18:54 [uml-devel] [PATCH 1/2] Update UBD to use pread/pwrite family of functions Anton Ivanov
2015-12-21 18:54 ` [uml-devel] [PATCH 2/2] Bulk IO Transaction support part 1 Anton Ivanov
2015-12-21 19:04 ` Anton Ivanov
2016-01-10 16:00 ` Richard Weinberger
2016-01-10 16:36 ` Anton Ivanov [this message]
2016-01-10 21:51 ` Richard Weinberger
2016-01-12 21:25 ` James McMechan
2016-01-12 21:39 ` Anton Ivanov
2016-01-10 15:57 ` [uml-devel] [PATCH 1/2] Update UBD to use pread/pwrite family of functions Richard Weinberger
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