On Tue, Jun 12, 2012 at 11:17 AM, Sašo Kiselkov <skiselkov...@gmail.com> wrote:
> On 06/12/2012 05:58 PM, Andy Bowers - Performance Engineering wrote:
>> find where your nics are bound too
>> mdb -k
>> ::interrupts
>> create a processor set including those cpus [ so just the nic code will
>> run there ]
>> andy
> Tried and didn't help, unfortunately. I'm still seeing drops. What's
> even funnier is that I'm seeing drops when the machine is sync'ing the
> txg to the zpool. So looking at a little UDP receiver I can see the
> following input stream bandwidth (the stream is constant bitrate, so
> this shouldn't happen):

If processing in interrupt context (use intrstat) is dominating cpu
usage, you may be able to use pcitool to cause the device generating
all of those expensive interrupts to be moved to another CPU.

Mike Gerdts
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