Date: Sat, 5 Nov 2011 20:59:46 +0200 From: Ivan Klymenko <fidaj@ukr.net> To: "O. Hartmann" <ohartman@zedat.fu-berlin.de> Cc: freebsd-current@freebsd.org, Jeff Roberson <jroberson@jroberson.net>, Andriy Gapon <avg@FreeBSD.org> Subject: Re: Increase the degree of interactivity ULE scheduler Message-ID: <20111105205946.346dbc34@nonamehost.> In-Reply-To: <4EB58384.6020205@zedat.fu-berlin.de> References: <4ea29f2c.a823440a.4aa0.3599SMTPIN_ADDED@mx.google.com> <alpine.BSF.2.00.1111031018030.1995@desktop> <4eb3032e.a82eec0a.12ad.ffff8d64SMTPIN_ADDED@mx.google.com> <alpine.BSF.2.00.1111031120340.1995@desktop> <20111104153318.0f3b9c9a@nonamehost.> <4EB58384.6020205@zedat.fu-berlin.de>
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=D0=92 Sat, 05 Nov 2011 19:42:12 +0100 "O. Hartmann" <ohartman@zedat.fu-berlin.de> =D0=BF=D0=B8=D1=88=D0=B5=D1=82: > Am 11/04/11 14:33, schrieb Ivan Klymenko: > > Maybe useful the following information: > > This problem appears not to all architectures and types of CPU. > > on the Russian forums > > http://www.bsdportal.ru/viewtopic.php?t=3D24900 > > http://forum.lissyara.su/viewtopic.php?f=3D45&t=3D34641&sid=3Daa596f0b7= 0806ba053011da911f9ccae > > was a brute force to find out that: > > there is a suspicion that: > > - for AMD processors, this problem is not observed at all when the > > number of cores >=3D 2 > > - on all single-core is the problem > > - only for some models with Intel >=3D 2 cores of the problem is not > > found > >=20 > > Perhaps, after all, avg@ rights (Subject: couple of sched_ule > > issues), that is not working properly mechanism rebalancing and to > > determine the topology of CPU? All converge, because my patch > > ( http://docs.freebsd.org/cgi/mid.cgi?20111022132817.35db5ccd ) for > > SMP systems just do respite for rebalancing, which eliminates the > > problem with interactivity ... > >=20 > > Thanks! >=20 > Is the patch going to be merged into HEAD shortly? >=20 > Regards, > Oliver >=20 I'm not sure... Most of all we must address the root causes of this problem...
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