Ok, I have finally found time and tested same machine under non-xen kernel - it behaves the same. I have noticed only that ethtool works fine on the non-xen kernel, while on xenified kernel it doesn't give much (only Link detected: yes). I was using FTP (30MB/s) and SMBCLIENT (18MB/s) as a test, but that is maybe not a good way to do it. My next question would be: how to test network load in general ? Any hint is welcome, Zoran.
2009/9/7 Zavodsky, Daniel (GE Capital) <[email protected]> > Hello, > From my experience, network is maybe 5-15% slower on a PV DomU than on > physical hardware on a gigabit ethernet interface (fully loaded). High > network traffic in DomU eats CPU in Dom0, therefore especially for smaller > message sizes (packets) the throughput is CPU-limited. There must be > something terribly wrong if you get transfer speed of only several kB/s. I > have not tried RHEL 5.4 yet, but up to 5.3 it had worked flawlessly. > > Regards, > Daniel > > ------------------------------ > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Zoran Popović > *Sent:* Thursday, September 03, 2009 7:25 PM > *To:* [email protected]; [email protected]; > Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list > *Subject:* [rhelv5-list] expected network throughput on RHEL Dom0 / PV > DomU > > I use Red Hat 5.3 Dom0 (kernel 2.6.18-128.4.1.el5xen, xen 3.1, using > default xenbridge0 configuration) and Red Hat 5.4 PV DomU (kernel > 2.6.18-164.el5xen, xennet module for eth0), on a HP BL870c (Itanium blade) > with gigabit network adapter (intel, probably). > What is the expected throughput on Dom0 and DomU using 1 network card in > such case (roughly, at least, and the ratio) ? > I made few basic tests with smbclient and ftp download and I am getting > around 18kb/s on Dom0 and 8kb/s on DomU, and I am suspicious about that. > What can be done to improve the throughput on both ? > > Zoran Popovic. > > > _______________________________________________ > rhelv5-list mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/rhelv5-list > >
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