Date: Mon, 20 Dec 2010 23:42:41 +0300 From: Lev Serebryakov <lev@serebryakov.spb.ru> To: freebsd-net@FreeBSD.org Cc: freebsd-net@FreeBSD.org Subject: Re: E4500 spend one core to saturate 1Gbit/s link with TCP -- is it nornal? Message-ID: <1715104467.20101220234241@serebryakov.spb.ru> In-Reply-To: <12810339411.20101220205327@serebryakov.spb.ru> References: <12810339411.20101220205327@serebryakov.spb.ru>
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Hello, Freebsd-net.
You wrote 20 =E4=E5=EA=E0=E1=F0=FF 2010 =E3., 20:53:27:
> I have file server with Core2Duo E4500 CPU and Intel gigabit adapter
> (82566DM).
> FreeBSD 8-STABLE (8.2-PRERELEASE #1: Fri Dec 3 2010) and
> samba35-3.5.6 are installed.
> This server could serve about 110MiB/s to one client over CIFS, but
> one core of CPU is completely busy in such situation: about 60% of CPU
> is occuped by "ketnel" and 35-40% occuped bu "smbd" accroding to "top
> -S" ouput.
> Is it normal, that 2.2GHz core is needed to saturate 1Gib link with
> only one client (and one TCP connction), or I have something
> misconfigured?
Ok, pressing "H" in "top" shows, that all this CPU goes to "{em0
tasq}" thread.
And, yes, I have all rxd/trd and other tunables set to recommended
high values.
--=20
// Black Lion AKA Lev Serebryakov <lev@serebryakov.spb.ru>
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