Date: Mon, 26 Jul 2004 11:01:03 -0400 From: James <haesu@towardex.com> To: Don Bowman <don@sandvine.com> Cc: freebsd-net@freebsd.org Subject: Re: device polling takes more CPU hits?? Message-ID: <20040726150103.GA26080@scylla.towardex.com> In-Reply-To: <FE045D4D9F7AED4CBFF1B3B813C85337051D9433@mail.sandvine.com> References: <FE045D4D9F7AED4CBFF1B3B813C85337051D9433@mail.sandvine.com>
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Hi Don,
> I would post the output of 'sysctl kern.polling', its likely
> some of the tuning there is insufficient.
> What do you have HZ set to (sysctl kern.clockrate)? I would
> probably have it set to ~1000.
> You will want 'machdep.cpu_idle_hlt=1'.
Thanks for quick reply. Here is the sysctl output with polling turned on.
-J
root@r2.bos# sysctl kern.clockrate
kern.clockrate: { hz = 4000, tick = 250, tickadj = 1, profhz = 1024, stathz = 128 }
root@r2.bos# sysctl kern.polling
kern.polling.burst: 150
kern.polling.each_burst: 5
kern.polling.burst_max: 150
kern.polling.idle_poll: 1
kern.polling.poll_in_trap: 1
kern.polling.user_frac: 50
kern.polling.reg_frac: 20
kern.polling.short_ticks: 4909
kern.polling.lost_polls: 11464
kern.polling.pending_polls: 0
kern.polling.residual_burst: 0
kern.polling.handlers: 1
kern.polling.enable: 1
kern.polling.phase: 0
kern.polling.suspect: 10249
kern.polling.stalled: 3
root@r2.bos# sysctl machdep.cpu_idle_hlt
machdep.cpu_idle_hlt: 1
--
James Jun TowardEX Technologies, Inc.
Technical Lead Network Design, Consulting, IT Outsourcing
james@towardex.com Boston-based Colocation & Bandwidth Services
cell: 1(978)-394-2867 web: http://www.towardex.com , noc: www.twdx.net
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