Re: [uml-devel] [PATCH 2/2] Bulk IO Transaction support part 1

[Richard Weinberger <richard@nod.at>]

Am 10.01.2016 um 17:36 schrieb Anton Ivanov:
> 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.

Ok!

Thanks,
//richard

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