From: Siim Vahtre <siim@xf.ee>
To: Purush Gupta <purush.gupta@nutanix.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux SCSI List <linux-scsi@vger.kernel.org>
Subject: Re: sequential I/O on SSD disk varies from 20 to 300 MBytes/s every week
Date: Wed, 4 Feb 2015 11:50:58 +0200 (EET) [thread overview]
Message-ID: <alpine.DEB.2.00.1502041138490.8618@q.xf.ee> (raw)
In-Reply-To: <CAN7X1UkducENcF_+GuY7rY3q+qAhAp9H1HWMAXnFFtfTjX7Zrw@mail.gmail.com>
> Since you mentioned problem does not happen on Windows, what do you use
> to emulate the workload (iometer ?)
CrystalDiskMark, HD Tune, ATTO Disk Benchmark
Tested for 2-3 hours, but got stable results. Directly afterwards booted
Live CD with Linux and immediately got poor results.
> and did you see the same behaviour with other Kernel versions like
> 2.6.32.
I did not test this, as this kernel version wouldn't work for me anyway.
If you think it would be very important datapoint, I can try.
> You may want to check the per device queue configuration, lsscsi -L
"queue_depth=256", same for all disks
next prev parent reply other threads:[~2015-02-04 9:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-02 13:07 Siim Vahtre
2015-02-02 13:49 ` Suman Tripathi
2015-02-02 14:08 ` Siim Vahtre
[not found] ` <CAN7X1UkducENcF_+GuY7rY3q+qAhAp9H1HWMAXnFFtfTjX7Zrw@mail.gmail.com>
2015-02-04 9:50 ` Siim Vahtre [this message]
2015-02-25 21:50 ` Pavel Machek
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