Date: Fri, 31 Aug 2012 22:54:05 +0700 From: Eugene Grosbein <egrosbein@rdtc.ru> To: Adrian Chadd <adrian@freebsd.org> Cc: pyunyh@gmail.com, freebsd-net@freebsd.org, Lev Serebryakov <lev@freebsd.org>, Ian Smith <smithi@nimnet.asn.au> Subject: Re: Bad routing performance on 500Mhz Geode LX with CURRENT, ipfw and mpd5 Message-ID: <5040DE1D.7040700@rdtc.ru> In-Reply-To: <CAJ-VmomzY1TFjwPdZWGStb9wBZ1RZrk3QZnJMGkxvftWGKPCHQ@mail.gmail.com> References: <1865271844.20120829131610@serebryakov.spb.ru> <CAHu1Y70MynCMQTrJUMwTZ0%2BLrM1JiZFt_B77028XHfoiRgzmaA@mail.gmail.com> <1807373989.20120829223125@serebryakov.spb.ru> <20120830152726.A33776@sola.nimnet.asn.au> <534292400.20120830131158@serebryakov.spb.ru> <20120831180721.GB3208@michelle.cdnetworks.com> <50404957.302@rdtc.ru> <5040508D.9080107@rdtc.ru> <CAJ-VmomzY1TFjwPdZWGStb9wBZ1RZrk3QZnJMGkxvftWGKPCHQ@mail.gmail.com>
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31.08.2012 13:54, Adrian Chadd пишет: > Just as a data point - disable preemption and try again? I've rebuilt by kernel with SCHED_ULE and excluded PREEMPTION. Stock driver works without changes in behaviour and driver from HEAD now works very similar to old one: LA is not higher than 2 and userland is pretty responsive. Also, transfer speed with new driver is several percent more. That's good. Care to explain such dramatic difference for new driver with/without PREEMPTION for relatively slow uniprocessor system? > And run 4BSD + no preemption, try again? I'll try that too in short time. Eugene Grosbein
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