Richard Brady
2010-Jan-25 12:15 UTC
Re: [Xen-devel] Sending packet at fixed rate really bad performance
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 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel