Packet loss every 30.999 seconds
kris at FreeBSD.org
Wed Dec 26 06:33:17 PST 2007
Mark Fullmer wrote:
> On Dec 25, 2007, at 12:27 AM, Kostik Belousov wrote:
>> What fs do you use ? If FFS, are softupdates turned on ? Please, show the
>> total time spent in the softdepflush process.
>> Also, try to add the FULL_PREEMPTION kernel config option and report
>> whether it helps.
> FFS with soft updates on all filesystems.
> With your latest uio_yield() in MNT_VNODE_FOREACH patch it's a
> little harder to provoke packet loss. Standard nightly
> crontabs and a tar -cf - / > /dev/null no longer cause drops. A
> make buildkernel will though.
> root 38 0.0 0.0 0 8 ?? DL Mon08PM 0:04.62
> Building a new kernel with KTR and FULL_PREEMPTION now.
FYI FULL_PREEMPTION causes performance loss in other situations.
More information about the freebsd-net