Date: Tue, 21 Dec 2010 01:42:41 +0600 From: Eugene Grosbein <egrosbein@rdtc.ru> To: Lev Serebryakov <lev@serebryakov.spb.ru> Cc: freebsd-net@freebsd.org Subject: Re: E4500 spend one core to saturate 1Gbit/s link with TCP -- is it nornal? Message-ID: <4D0FB1B1.7070703@rdtc.ru> In-Reply-To: <12810339411.20101220205327@serebryakov.spb.ru> References: <12810339411.20101220205327@serebryakov.spb.ru>
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On 20.12.2010 23:53, Lev Serebryakov wrote: > 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? Compare with ftpd that uses sendfile() kernel function. Eugene Grosbein
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