public inbox for [email protected]
 help / color / mirror / Atom feed
From: Jens Axboe <[email protected]>
To: Pavel Begunkov <[email protected]>,
	Christoph Hellwig <[email protected]>
Cc: [email protected], [email protected],
	[email protected], [email protected]
Subject: Re: [RFC for-next v2 0/4] enable pcpu bio caching for IRQ I/O
Date: Thu, 20 Oct 2022 05:53:07 -0700	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On 10/20/22 5:40 AM, Pavel Begunkov wrote:
> On 10/20/22 09:32, Christoph Hellwig wrote:
>> On Tue, Oct 18, 2022 at 08:50:54PM +0100, Pavel Begunkov wrote:
>>> This series implements bio pcpu caching for normal / IRQ-driven I/O
>>> extending REQ_ALLOC_CACHE currently limited to iopoll. The allocation side
>>> still only works from non-irq context, which is the reason it's not enabled
>>> by default, but turning it on for other users (e.g. filesystems) is
>>> as a matter of passing a flag.
>>>
>>> t/io_uring with an Optane SSD setup showed +7% for batches of 32 requests
>>> and +4.3% for batches of 8.
>>
>> This looks much nicer to me than the previous attempt exposing the bio
>> internals to io_uring, thanks.
> 
> Yeah, I saw the one Jens posted before but I wanted this one to be more
> generic, i.e. applicable not only to io_uring. Thanks for taking a look.

It is indeed better like that, also because we can get rid of the alloc
cache flag long term and just have it be the way that bio allocations
work.

-- 
Jens Axboe



  reply	other threads:[~2022-10-20 12:53 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-18 19:50 [RFC for-next v2 0/4] enable pcpu bio caching for IRQ I/O Pavel Begunkov
2022-10-18 19:50 ` [RFC for-next v2 1/4] bio: safeguard REQ_ALLOC_CACHE bio put Pavel Begunkov
2022-10-20  8:26   ` Christoph Hellwig
2022-10-18 19:50 ` [RFC for-next v2 2/4] bio: split pcpu cache part of bio_put into a helper Pavel Begunkov
2022-10-20  8:30   ` Christoph Hellwig
2022-10-18 19:50 ` [RFC for-next v2 3/4] block/bio: add pcpu caching for non-polling bio_put Pavel Begunkov
2022-10-20  8:31   ` Christoph Hellwig
2022-10-20 12:26     ` Pavel Begunkov
2022-10-18 19:50 ` [RFC for-next v2 4/4] io_uring/rw: enable bio caches for IRQ rw Pavel Begunkov
2022-10-20  8:32 ` [RFC for-next v2 0/4] enable pcpu bio caching for IRQ I/O Christoph Hellwig
2022-10-20 12:40   ` Pavel Begunkov
2022-10-20 12:53     ` Jens Axboe [this message]
2022-10-20 12:50 ` (subset) " Jens Axboe

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox