From: Bart Van Assche <Bart.VanAssche@wdc.com>
To: "hch@lst.de" <hch@lst.de>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"john.garry@huawei.com" <john.garry@huawei.com>,
"linuxarm@huawei.com" <linuxarm@huawei.com>
Subject: Re: [PATCH] scsi: default to scsi-mq
Date: Tue, 11 Jul 2017 13:32:51 +0000 [thread overview]
Message-ID: <1499779970.3345.1.camel@wdc.com> (raw)
In-Reply-To: <e3c07504-8538-f2f3-003a-01b72e0c07c6@huawei.com>
On Tue, 2017-07-11 at 11:22 +0100, John Garry wrote:
> On 10/07/2017 16:50, Bart Van Assche wrote:
> > Since a fix for the performance regression triggered by this patch will be upstream
> > soon (see also https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-linus&id=32825c45ff8f4cce937ab85b030dc693ceb1aa0a):
> >
>
> FYI, on linux-next 20170711 (which now includes the above patch Bart
> mentioned) we see a large performance regression on hisi_sas (LLDD does
> not config shost for mq).
>
> fio read mode iops goes from ~833K (scsi_mod.use_blk_mq=n on cmdline) to
> ~320K
Hello John,
Thanks for the feedback. Is the kernel config with which these measurements
were performed available somewhere?
Bart.
next prev parent reply other threads:[~2017-07-11 13:32 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-16 8:27 [PATCH] scsi: default to scsi-mq Christoph Hellwig
2017-06-19 6:03 ` [lkp-robot] [scsi] ebc76736f2: fio.write_bw_MBps -4% regression kernel test robot
2017-06-19 6:03 ` kernel test robot
2017-06-19 7:09 ` Christoph Hellwig
2017-06-19 7:09 ` Christoph Hellwig
2017-06-19 7:09 ` Christoph Hellwig
2017-06-19 7:49 ` Ye Xiaolong
2017-06-19 7:49 ` Ye Xiaolong
2017-06-19 7:49 ` Ye Xiaolong
2017-06-19 8:41 ` Christoph Hellwig
2017-06-19 8:41 ` Christoph Hellwig
2017-06-19 8:52 ` Ye Xiaolong
2017-06-19 8:52 ` Ye Xiaolong
2017-06-19 9:39 ` Christoph Hellwig
2017-06-19 9:39 ` Christoph Hellwig
2017-06-20 2:16 ` Ye Xiaolong
2017-06-20 2:16 ` Ye Xiaolong
2017-06-20 6:04 ` Christoph Hellwig
2017-06-20 6:04 ` Christoph Hellwig
2017-06-22 15:05 ` [PATCH] scsi: default to scsi-mq Martin Wilck
2017-06-26 9:48 ` Christoph Hellwig
2017-06-26 12:13 ` Bart Van Assche
2017-06-26 15:31 ` Bart Van Assche
2017-06-26 18:55 ` Martin Wilck
2017-06-27 6:07 ` Bart Van Assche
2017-07-10 15:50 ` Bart Van Assche
2017-07-11 10:22 ` John Garry
2017-07-11 13:32 ` Bart Van Assche [this message]
2017-07-11 14:14 ` John Garry
2017-07-11 15:46 ` Bart Van Assche
2017-07-11 17:34 ` John Garry
2017-07-12 8:26 ` John Garry
2017-07-12 14:18 ` Bart Van Assche
2017-07-12 15:54 ` Jonathan Cameron
2017-07-14 9:56 ` Jonathan Cameron
2017-07-14 12:45 ` hch
2017-07-18 15:58 ` Jonathan Cameron
2017-07-18 16:24 ` Jonathan Cameron
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