Packet passing performance study on exotic hardware.

David Gilbert dgilbert at
Fri Oct 8 09:18:17 PDT 2004

>>>>> "Mike" == Mike Tancsa <mike at> writes:

Mike> At 10:08 AM 08/10/2004, David Gilbert wrote:
>> Right out of the box, FreeBSD 5.3 (with polling) passed about 200
>> kpps.  net.isr.enable=1 increased that without polling to about 220

Mike> Did you have kern.polling.idle_poll at 0 or 1 ? In my tests a
Mike> few weeks ago this seemed to make a difference, but the load avg
Mike> gets messed up.  Also, HZ does seem to make a difference at
Mike> least in my tests on BETA5.

I can confirm the HZ not making a sizable difference (although I
believe it cuts polling latency under ligher load, so we used 10000 by
default and we tested 1000).

Idle_poll is default 1, I'm not positive we tested 0.  I don't think
there is much idle time here.


|David Gilbert, Independent Contractor.       | Two things can only be     |
|Mail:       dave at                    |  equal if and only if they |
|                              |   are precisely opposite.  |

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