From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Dario Faggioli <dario.faggioli@citrix.com>
Cc: Xen-devel <xen-devel@lists.xenproject.org>,
Michael Schinzel <schinzel@ip-projects.de>,
Thomas Toka <toka@ip-projects.de>,
Roger Pau Monne <roger.paumonne@citrix.com>
Subject: Re: Read Performance issue when Xen Hypervisor is activated
Date: Fri, 13 Jan 2017 08:32:34 -0500 [thread overview]
Message-ID: <20170113133234.GA27082@char.us.oracle.com> (raw)
In-Reply-To: <1484240629.9947.18.camel@citrix.com>
.
> time dd if=/dev/zero of=datei bs=1M count=10240
> Without Xen (baremetal Linux) With Xen (from within dom0)
> 73.7224 s, 146 MB/s 97.6948 s, 110 MB/s
> real 1m13.724s real 1m37.700s
> user 0m0.000s user 0m0.068s
> sys 0m9.364s sys 0m15.180s
>
>
> root@Zhaman:~# time dd if=datei of=/dev/null
> Without Xen (baremetal Linux) With Xen (from within dom0)
> 9.92787 s, 1.1 GB/s 95.1827 s, 113 MB/s
> real 0m9.953s real 1m35.194s
> user 0m2.096s user 0m10.632s
> sys 0m7.300s sys 0m51.820s
>
> Which confirms that, when running the tests inside a Xen Dom0, things
> are indeed slower.
.. and which PVH should fix. Also 'dd' sucks for benchmark, pls
use 'fio' which more consistently checks storage speeds.
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next prev parent reply other threads:[~2017-01-13 13:32 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-27 14:26 Read Performance issue when Xen Hypervisor is activated Michael Schinzel
2016-12-30 16:34 ` Dario Faggioli
2016-12-30 16:53 ` Michael Schinzel
2016-12-31 9:07 ` Michael Schinzel
2017-01-02 7:15 ` Michael Schinzel
2017-01-12 17:03 ` Dario Faggioli
2017-01-13 13:32 ` Konrad Rzeszutek Wilk [this message]
-- strict thread matches above, loose matches on Subject: below --
2016-12-26 11:48 Michael Schinzel
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