Date: Tue, 16 Oct 2001 13:36:32 +0100 From: Mike Pumford <mpumford@mpc-data.co.uk> To: freebsd-questions@freebsd.org, freebsd-stable@freebsd.org Subject: Re: 0.00% CPU for all processes Message-ID: <200110161236.NAA17246@lion.mpc-data.co.uk> In-Reply-To: Your message of "Sat, 16 Oct 2001 08:01:01 %2B0200." <200110160601.f9G611T20245@zibbi.icomtek.csir.co.za>
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> > One thing which surprises me, though --- all other processes are zero. > > Is this normal? This is my first time seeing FreeBSD run. I have an > > identical box here running linux (and each box runs a minimum of > > services), where at least top will show nonzero CPU percentage in top, > > usually around 0.5%. Does linux have more fine-grained timing, or is > > it cheating, or does the margin of error render this test essentially > > meaningless anyway? > top on Linux is really slow compared to the BSD versions. It is slower to update and always consumes a significant chunk of CPU. BSD top seems much more efficient. Possibly down to the fact the BSD top gathers its info with libkvm while linux top has to parse a load of files in /proc. I suspect there may be differences in the CPU usage calculation algorithm as well. Mike To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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