Date: Fri, 30 Mar 2001 11:34:05 +0100 (BST) From: Doug Rabson <dfr@nlsystems.com> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: <freebsd-alpha@freebsd.org> Subject: Re: do we care about performance yet? Message-ID: <Pine.BSF.4.33.0103301132230.56601-100000@herring.nlsystems.com> In-Reply-To: <15044.1867.943183.224703@grasshopper.cs.duke.edu>
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On Thu, 29 Mar 2001, Andrew Gallatin wrote: > > FWIW, I ran a make buildworld this evening on my UP1000 under iprobe, > as well as with the receive side of a netperf tcp stream. > > (for anybody who doesn't know what iprobe is, check out > http://www.cs.duke.edu/ari/iprobe) > > For the buildworld, the system spent about 40% of its time in kernel. > Roughly 50% of that was in various states of idleness. I've left full > reports at: > > http://www.cs.duke.edu/~gallatin/iprobe_current/ > > The "???NOT_FOUND" is userland code I didn't tell iprobe about. I think this is just showing a lot of contention for the Giant mutex (and probably some i/o waiting). Since we don't halt on idle, the cpu will spend a lot of time buzzlooping on runq_check. -- Doug Rabson Mail: dfr@nlsystems.com Phone: +44 20 8348 6160 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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