Date: Wed, 4 May 2011 17:26:36 +0400 From: Lev Serebryakov <lev@FreeBSD.org> To: Lev Serebryakov <lev@FreeBSD.org> Cc: freebsd-stable@freebsd.org Subject: Re: How to understand, what userland program does in kernel? Message-ID: <369893537.20110504172636@serebryakov.spb.ru> In-Reply-To: <455293202.20110504164901@serebryakov.spb.ru> References: <455293202.20110504164901@serebryakov.spb.ru>
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Hello, Lev. You wrote 4 =EC=E0=FF 2011 =E3., 16:49:01: > I have userland program (transmission BT client), which spent 100% > of one core of E4500 CPU when it has many peers. It is surprises me, > as channel is only 35Mbit, and my "Linux" friends can upload much more > on comparable hardware. > But what surprises me even more, that 50% of this time it spends as > System time. When it spents, says, 75% of one core, SYSTEM is only 1-2%, not 75%/2 =3D~ 37%, what is interesting... --=20 // Black Lion AKA Lev Serebryakov <lev@FreeBSD.org>
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