Packet passing performance study on exotic hardware.

David Gilbert dgilbert at
Fri Oct 8 11:31:12 PDT 2004

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

Mike> At 12:18 PM 08/10/2004, David Gilbert wrote:
>> Idle_poll is default 1, I'm not positive we tested 0.  I don't
>> think there is much idle time here.

Mike> Actually, on RELENG_5, I think the default is now zero.

checked, tho.  We did set it to 1 in sysctl.conf.

Mike> With a releng_5 BETA7 box in between 2 other hosts, with
Mike> idle_poll set to the default on zero, using

Mike> /usr/local/netperf/netperf -l 30 -H -i 10,2 -I 99,10
Mike> -t UDP_STREAM -- -m 1000 -s 32768 32768

Mike> I see about 483Mb.  If I set it to 1,

Mike> I get just over 500Mb.  This was with an HZ of 1000

This is well below the doubling I want to see, but I will add this to
the test suite.


|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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