On Wed, 2006-12-27 at 14:09 -0800, Siegfried Nikolaivich wrote:
> I have been stuck trying to unzip a file over the network. Each time I try,
> the server machine slows down to a crawl until it is frozen, even the
> ethernet links go down.
by any chance, is this an NFS-exported ZFS filesystem from a SPARC
system with ATA disks? this may be a known bug:
6421427 netra x1 slagged by NFS over ZFS leading to long spins in the
ATA driver code
.. fixed in snv_52. (it also affects ultra 5/10, sunfire v100, etc.,)
> I've tried this on several clients, different network cards, different
> protocols. Does anyone have any suggestions what I can try to
> determine where the problem is?
>
> Are there any DTrace scripts I can run to show me where the machine is
> freezing?
lockstat's kernel profiling would be the first thing I'd use (this is in
some sense a "dtrace script" as lockstat is now built on top of dtrace
mechanisms)
For instance:
example# lockstat -s 10 -I sleep 20
will show where the kernel is spending its time during a roughly
20-second interval.
- Bill
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