From: David Vrabel <david.vrabel@citrix.com>
To: Juergen Gross <jgross@suse.com>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
Subject: Re: pvUSB backend performance
Date: Mon, 29 Jun 2015 14:46:26 +0100 [thread overview]
Message-ID: <55914C32.6040105@citrix.com> (raw)
In-Reply-To: <558A9D2A.2020006@suse.com>
On 24/06/15 13:06, Juergen Gross wrote:
> Hi,
>
> my qemu integrated pvUSB backend is now running stable enough to do
> some basic performance measurements. I've passed a memory-stick with
> about 90MB of data on it to a pv-domU. Then I read all the data on
> it with tar and looked how long this would take (elapsed time):
>
> in dom0: 5.2s
> in domU with kernel backend: 6.1s
> in domU with qemu backend: 8.2s
>
> So the qemu backend is about 30% slower than the kernel backend. Is
> this acceptable?
Yes? Maybe? I assume you're adding this backend for a reason, so is it
good enough for your workloads?
IMO, It seems a reasonable trade off to not have a bunch of kernel code.
David
next prev parent reply other threads:[~2015-06-29 13:46 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-24 12:06 pvUSB backend performance Juergen Gross
2015-06-24 13:57 ` Konrad Rzeszutek Wilk
2015-06-25 3:36 ` Juergen Gross
2015-06-25 8:53 ` Dario Faggioli
2015-06-25 10:41 ` Juergen Gross
2015-06-29 13:22 ` George Dunlap
2015-06-29 13:36 ` Juergen Gross
2015-07-02 16:41 ` George Dunlap
2015-07-03 4:27 ` Juergen Gross
2015-06-29 13:46 ` David Vrabel [this message]
2015-06-29 13:53 ` Juergen Gross
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