From: Richard Brady <rnbrady@gmail.com>
To: xen-devel@lists.xensource.com
Subject: Re: Sending packet at fixed rate really bad performance
Date: Mon, 25 Jan 2010 12:15:53 +0000 [thread overview]
Message-ID: <4d6de31b1001250415x2cd71d49qa148a3f956ccc5a4@mail.gmail.com> (raw)
In-Reply-To: <4d6de31b0912301058j1dea3f2fud656822d29025266@mail.gmail.com>
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Hi Marco
On Sun, Sep 27, 2009 at 07:26:49PM +0200, Marco Tizzoni wrote:
> Hi all,
> I'm doing some tests about i/o performance and cpu overhead in dom0.
> I've coded a small tool that can sends UDP packets at fixed rate or
> flood. While sending packet at fixed rate I'm experiencing performance
> problem, related to how Xen handle signal, I guess.
>
> On my laptop (Core2 duo P8700), with no Xen running, I can send
> packets at a rate of 20k, 40k, 60k, 80k/s achieving an actual packet
> rate per second pretty near to the requested rate.
>
> On Xen (dom0 with no guest running and no load - Athlon 64 dual core
> 4000+ ), the performance are really bad.
Did you find a solution to this?
We are experiencing the same problem on hosts which are processing
VoIP packets. Like your test application, the packets are periodic but
high in volume.
Regards,
Richard
--
Richard Brady
T: +44 (0)7771 623 348
E: rnbrady@gmail.com
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next parent reply other threads:[~2010-01-25 12:15 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4d6de31b0912301058j1dea3f2fud656822d29025266@mail.gmail.com>
2010-01-25 12:15 ` Richard Brady [this message]
2009-09-27 17:26 Sending packet at fixed rate really bad performance Marco Tizzoni
2009-09-28 14:17 ` Konrad Rzeszutek Wilk
2009-09-28 16:28 ` Marco Tizzoni
2009-09-28 16:44 ` Konrad Rzeszutek Wilk
2009-09-28 18:00 ` Marco Tizzoni
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