Date: Mon, 8 Nov 2004 18:30:07 +0100 From: Divacky Roman <xdivac02@stud.fit.vutbr.cz> To: current@freebsd.org Subject: Re: [HEADSUP] Please help test device vnode bypass! Message-ID: <20041108173007.GA93246@stud.fit.vutbr.cz> In-Reply-To: <2602.1099910947@critter.freebsd.dk> References: <2602.1099910947@critter.freebsd.dk>
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> > On a 700MHz K7 machine this doubles the speed of > > dd if=/dev/zero of=/dev/null bs=1 count=1000000 > > > > This roughly translates to shaving 2usec of each read/write syscall. I tried it (no problem yet) and did a bit testing... (cp -R /sys/ /tmp/s, dd if=/dev/zero of=smth count=1000000, cp smth smth1 and so on) and it seems like its actually a bit slower (but everything works properly) - did I get anything wrong? should the results be a bit better (I did three runs every time of each test) roman
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