On 09/05/2013 09:26 AM, Ján ONDREJ (SAL) wrote: > Hello, > > today I disovered, that e1000 cards has very poor performance in Fedora 18 > and 19. Does not matter, if guest is an Linux or other system. > By "poor" I mean TCP network transfers about 5-90 kB/s, even if they are on > an gigabit network. > > By downgrading kernel on Fedora 19 from 3.10.X to > kernel-3.9.5-301.fc19.x86_64 fixed my problem, so looks like there > is an bug in kernel. I tested these kernels: > > Fast: > kernel-3.9.5-301.fc19.x86_64 > > Slow: > kernel-3.10.7-100.fc18.x86_64 > kernel-3.10.9-100.fc18.x86_64 > kernel-3.10.10-200.fc19.x86_64 > > Looks like it is an change with kernel-3.10.X. I can test other kernels if > requested. > > For me, it's easy to reproduce. Tested on 4 host machines, 2 Fedoras, > multiple kernels and different guests. Also tested some network cards, > e1000, pcnet, ... All with similar problems. > > As described in other bug, virtio net driver has time skew problems, so > I can't use it. :-( > > Any ideas, how to solve this problem? >
I haven't heard anything about this myself, maybe the kernel guys have a better idea. Unless you want to try git bisect, best thing to do is file a fedora kernel bug or try your luck upstream - Cole _______________________________________________ virt mailing list virt@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/virt
