Date: Thu, 21 Apr 2005 19:30:11 -0700 From: "David Schwartz" <davids@webmaster.com> To: <freebsd-stable@freebsd.org> Subject: RE: Tuning for router performance Message-ID: <MDEHLPKNGKAHNMBLJOLKAEAMDFAB.davids@webmaster.com> In-Reply-To: <200504201407.j3KE7xNb000651@tuscan.xciv.org>
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> In article <MDEHLPKNGKAHNMBLJOLKEEKADDAB.davids@webmaster.com>,
> davids@webmaster.com ("David Schwartz") writes:
>
> >> options HZ=1000 #for polling
> > That's too low. 2000 is the minimum you should consider.
>
> Having fixed my traffic generator, I'm now hitting ~220Kpps as limit
> before errors.
Excellent.
> > kern.random.sys.harvest.ethernet=0
> > kern.random.sys.hervest.interrupt=0
>
> Doesn't seem to make any real difference in my test.
That's strange, maybe it's because in polling mode there aren't many
interrupts.
> > kern.ipc.nmbclusters="262144"
> > vm.kmem_size="536870912"
> > vm.kmem_size_max="536870912"
>
> These don't really make any difference, I'm guessing would only help
> larger packet sizes?
The 'nmbclusters' change really only affects things if you have a lot of
local endpoints. And the kmem_size stuff only affects the case where you
have a lot of dummynet pipes or dynamic firewall rules. They're just part of
my typical router tuning because people often want these things as well.
DS
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