From: Mike Christie <mchristi@redhat.com>
To: Andy Grover <agrover@redhat.com>,
lixiubo@cmss.chinamobile.com, nab@linux-iscsi.org,
shli@kernel.org
Cc: hch@lst.de, sheng@yasker.org, namei.unix@gmail.com,
bart.vanassche@sandisk.com, linux-scsi@vger.kernel.org,
target-devel@vger.kernel.org, linux-kernel@vger.kernel.org,
Jianfei Hu <hujianfei@cmss.chinamobile.com>,
Venky Shankar <vshankar@redhat.com>
Subject: Re: [PATCH] target/user: Add daynmic growing data area feature support
Date: Mon, 27 Feb 2017 17:56:21 -0600 [thread overview]
Message-ID: <58B4BCA5.2060002@redhat.com> (raw)
In-Reply-To: <09891673-0d95-8b66-ddce-0ace7aea43d1@redhat.com>
On 02/22/2017 02:32 PM, Andy Grover wrote:
> On 02/17/2017 01:24 AM, lixiubo@cmss.chinamobile.com wrote:
>> > From: Xiubo Li <lixiubo@cmss.chinamobile.com>
>> >
>> > Currently for the TCMU, the ring buffer size is fixed to 64K cmd
>> > area + 1M data area, and this will be bottlenecks for high iops.
> Hi Xiubo, thanks for your work.
>
> daynmic -> dynamic
>
> Have you benchmarked this patch and determined what kind of iops
> improvement it allows? Do you see the data area reaching its
> fully-allocated size?
>
I tested this patch with Venky's tcmu-runner rbd aio patches, with one
10 gig iscsi session, and for pretty basic fio direct io (64 -256K
read/writes with a queue depth of 64 numjobs between 1 and 4) tests read
throughput goes from about 80 to 500 MB/s. Write throughput is pretty
low at around 150 MB/s.
I did not hit the fully allocated size. I did not drive a lot of IO though.
next prev parent reply other threads:[~2017-02-27 23:59 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-17 9:24 [PATCH] target/user: Add daynmic growing data area feature support lixiubo
2017-02-22 20:32 ` Andy Grover
2017-02-24 2:07 ` [PATCH] target/user: Add daynmic growing data area featuresupport Xiubo Li
2017-02-24 22:29 ` Andy Grover
2017-02-27 5:59 ` Xiubo Li
2017-02-27 19:32 ` how to unmap pages in an anonymous mmap? Andy Grover
2017-02-27 19:32 ` Andy Grover
2017-03-10 1:45 ` Xiubo Li
2017-03-10 1:45 ` Xiubo Li
2017-03-10 1:45 ` Xiubo Li
2017-02-27 23:56 ` Mike Christie [this message]
2017-02-28 1:22 ` [PATCH] target/user: Add daynmic growing data area featuresupport Xiubo Li
2017-02-28 18:13 ` Mike Christie
2017-03-01 1:22 ` Xiubo Li
2017-02-28 9:13 ` Xiubo Li
2017-03-01 10:53 ` Xiubo Li
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