Date: Sat, 28 Mar 2009 10:52:12 -0400 From: Jay Aikat <ja@unc.edu> To: Yuriy Grishin <grishin-mailing-lists@minselhoz.samara.ru> Cc: freebsd-pf@freebsd.org Subject: Re: pftop queue stats Message-ID: <49CE399C.2080406@unc.edu> In-Reply-To: <49CE3822.409@minselhoz.samara.ru> References: <49CE29DB.7010803@unc.edu> <49CE3822.409@minselhoz.samara.ru>
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The large queue limit is just for testing purposes. Once I figure out
this logging of the queue at better granularity, I plan to have more
realistic queue limits.
These are for experiments I am running in our lab to study network
traffic characteristics and the effect of that on router queuing - just FYI.
Thanks.
Yuriy Grishin wrote:
> Jay Aikat wrote:
>> Hi,
>> I am looking for a way to log queue stats at less than 1 second
>> intervals.
>>
>> On my FreeBSD router, the pf.conf file is configured as follows:
>> > altq on $ext_if1 priq bandwidth 622Mb qlimit 65535 queue { tcp_q1 }
>> > queue tcp_q1 on $ext_if1 qlimit 65535 priq (default)
>>
>> Using pftop, I can get queue lengths per second at best.
>> $ pftop -s 1 -v queue -d 1000 > pftop.out
>>
>> Is there an option in pftop to log stats per millisecond, or even
>> 100ms? The -s option above seems to default to 1 second at best.
>>
>> Thanks for any pointers you can give me.
>
> I suppose that there should be some pre-defined variables in the source
> code.
> BTW Why do you use an extremely large qlimit?
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