Date: Wed, 30 May 2012 15:02:15 -0700 From: Adrian Chadd <adrian@freebsd.org> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-hackers@freebsd.org, Alexander Motin <mav@freebsd.org> Subject: Re: ULE/sched issues on stable/9 - why isn't preemption occuring? Message-ID: <CAJ-VmokXN9Ci8j2ExZkA-U=fsrMmeOn-ULB0pCYdtSwqHWpiKQ@mail.gmail.com> In-Reply-To: <201205301124.52597.jhb@freebsd.org> References: <CAJ-VmomWV2XibSNSr5Mfh7mpKsWrX5GKsNfU9iq7TO6%2BKxxQhw@mail.gmail.com> <201205301124.52597.jhb@freebsd.org>
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Hi, I've re-run the test with powerd and sleep state stuff disabled - lo and behold, UDP tests are now up around 240-250MBit, what I'd expect for this 2 stream 11n device. So why is it that I lose roughly 80MBit of throughput with powerd and C2/C3 enabled, when there's plenty of CPU going around? The NIC certainly isn't going to sleep (I've not even added that code.) Adrian
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