LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: "Srivatsa S. Bhat" <srivatsa@csail.mit.edu>
To: Paolo Valente <paolo.valente@linaro.org>
Cc: linux-fsdevel@vger.kernel.org,
linux-block <linux-block@vger.kernel.org>,
linux-ext4@vger.kernel.org, cgroups@vger.kernel.org,
kernel list <linux-kernel@vger.kernel.org>,
Jens Axboe <axboe@kernel.dk>, Jan Kara <jack@suse.cz>,
Jeff Moyer <jmoyer@redhat.com>, Theodore Ts'o <tytso@mit.edu>,
amakhalov@vmware.com, anishs@vmware.com, srivatsab@vmware.com,
Ulf Hansson <ulf.hansson@linaro.org>,
Linus Walleij <linus.walleij@linaro.org>
Subject: Re: CFQ idling kills I/O performance on ext4 with blkio cgroup controller
Date: Thu, 13 Jun 2019 12:13:05 -0700 [thread overview]
Message-ID: <72856150-d678-42bd-0377-82dbee6513ba@csail.mit.edu> (raw)
In-Reply-To: <43486E4F-2237-4E40-BDFE-07CFCCFFFA25@linaro.org>
On 6/12/19 10:46 PM, Paolo Valente wrote:
>
>> Il giorno 12 giu 2019, alle ore 00:34, Srivatsa S. Bhat <srivatsa@csail.mit.edu> ha scritto:
>>
[...]
>>
>> Hi Paolo,
>>
>
> Hi
>
>> Hope you are doing great!
>>
>
> Sort of, thanks :)
>
>> I was wondering if you got a chance to post these patches to LKML for
>> review and inclusion... (No hurry, of course!)
>>
>
>
> I'm having troubles testing these new patches on 5.2-rc4. As it
> happened with the first release candidates for 5.1, the CPU of my test
> machine (Intel Core i7-2760QM@2.40GHz) is so slowed down that results
> are heavily distorted with every I/O scheduler.
>
Oh, that's unfortunate!
> Unfortunately, I'm not competent enough to spot the cause of this
> regression in a feasible amount of time. I hope it'll go away with
> next release candidates, or I'll test on 5.1.
>
Sounds good to me!
>> Also, since your fixes address the performance issues in BFQ, do you
>> have any thoughts on whether they can be adapted to CFQ as well, to
>> benefit the older stable kernels that still support CFQ?
>>
>
> I have implanted my fixes on the existing throughput-boosting
> infrastructure of BFQ. CFQ doesn't have such an infrastructure.
>
> If you need I/O control with older kernels, you may want to check my
> version of BFQ for legacy block, named bfq-sq and available in this
> repo:
> https://github.com/Algodev-github/bfq-mq/
>
Great! Thank you for sharing this!
> I'm willing to provide you with any information or help if needed.
>
Thank you!
Regards,
Srivatsa
VMware Photon OS
next prev parent reply other threads:[~2019-06-13 19:13 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-17 22:16 Srivatsa S. Bhat
2019-05-18 18:39 ` Paolo Valente
2019-05-18 19:28 ` Theodore Ts'o
2019-05-20 9:15 ` Jan Kara
2019-05-20 10:45 ` Paolo Valente
2019-05-21 16:48 ` Theodore Ts'o
2019-05-21 18:19 ` Josef Bacik
2019-05-21 19:10 ` Theodore Ts'o
2019-05-20 10:38 ` Paolo Valente
2019-05-21 7:38 ` Andrea Righi
2019-05-18 20:50 ` Srivatsa S. Bhat
2019-05-20 10:19 ` Paolo Valente
2019-05-20 22:45 ` Srivatsa S. Bhat
2019-05-21 6:23 ` Paolo Valente
2019-05-21 7:19 ` Srivatsa S. Bhat
2019-05-21 9:10 ` Jan Kara
2019-05-21 16:31 ` Theodore Ts'o
2019-05-21 11:25 ` Paolo Valente
2019-05-21 13:20 ` Paolo Valente
2019-05-21 16:21 ` Paolo Valente
2019-05-21 17:38 ` Paolo Valente
2019-05-21 22:51 ` Srivatsa S. Bhat
2019-05-22 8:05 ` Paolo Valente
2019-05-22 9:02 ` Srivatsa S. Bhat
2019-05-22 9:12 ` Paolo Valente
2019-05-22 10:02 ` Srivatsa S. Bhat
2019-05-22 9:09 ` Paolo Valente
2019-05-22 10:01 ` Srivatsa S. Bhat
2019-05-22 10:54 ` Paolo Valente
2019-05-23 2:30 ` Srivatsa S. Bhat
2019-05-23 9:19 ` Paolo Valente
2019-05-23 17:22 ` Paolo Valente
2019-05-23 23:43 ` Srivatsa S. Bhat
2019-05-24 6:51 ` Paolo Valente
2019-05-24 7:56 ` Paolo Valente
2019-05-29 1:09 ` Srivatsa S. Bhat
2019-05-29 7:41 ` Paolo Valente
2019-05-30 8:29 ` Srivatsa S. Bhat
2019-05-30 10:45 ` Paolo Valente
2019-06-02 7:04 ` Srivatsa S. Bhat
2019-06-11 22:34 ` Srivatsa S. Bhat
2019-06-12 13:04 ` Jan Kara
2019-06-12 19:36 ` Srivatsa S. Bhat
2019-06-13 6:02 ` Greg Kroah-Hartman
2019-06-13 19:03 ` Srivatsa S. Bhat
2019-06-13 8:20 ` Jan Kara
2019-06-13 19:05 ` Srivatsa S. Bhat
2019-06-13 8:37 ` Jens Axboe
2019-06-13 5:46 ` Paolo Valente
2019-06-13 19:13 ` Srivatsa S. Bhat [this message]
2019-05-23 23:32 ` Srivatsa S. Bhat
2019-05-30 8:38 ` Srivatsa S. Bhat
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 \
--in-reply-to=72856150-d678-42bd-0377-82dbee6513ba@csail.mit.edu \
--to=srivatsa@csail.mit.edu \
--cc=amakhalov@vmware.com \
--cc=anishs@vmware.com \
--cc=axboe@kernel.dk \
--cc=cgroups@vger.kernel.org \
--cc=jack@suse.cz \
--cc=jmoyer@redhat.com \
--cc=linus.walleij@linaro.org \
--cc=linux-block@vger.kernel.org \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=paolo.valente@linaro.org \
--cc=srivatsab@vmware.com \
--cc=tytso@mit.edu \
--cc=ulf.hansson@linaro.org \
--subject='Re: CFQ idling kills I/O performance on ext4 with blkio cgroup controller' \
/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
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).