Packet loss every 30.999 seconds

Mark Fullmer maf at
Wed Dec 26 04:54:40 PST 2007

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.


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