Date: Wed, 25 Apr 2012 00:45:33 +0400 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: "K. Macy" <kmacy@freebsd.org> Cc: freebsd-performance@freebsd.org, freebsd-current@freebsd.org Subject: Re: pmap and mtx scalability problem Message-ID: <20120424204533.GS32749@zxy.spb.ru> In-Reply-To: <CAHM0Q_Pso4iFXt5afBSxxK2kywm=dpm_2W29EUosJtc0XDkR_g@mail.gmail.com> References: <20120424191415.GE76983@zxy.spb.ru> <CAHM0Q_PEe18-4yfrHPujUWxsvWTUuP2-0QvJtWOh2f=igjqh=A@mail.gmail.com> <20120424203658.GR32749@zxy.spb.ru> <CAHM0Q_Pso4iFXt5afBSxxK2kywm=dpm_2W29EUosJtc0XDkR_g@mail.gmail.com>
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On Tue, Apr 24, 2012 at 10:43:08PM +0200, K. Macy wrote: > No. I developed a patch from Jeffr that pushed the vm_page_lock array > down in to the machine dependent code, replacing most of the uses of > the single vm_page_queue_lock. However, alc doesn't like the design > and has not proposed an alternative. can i test this? > -Kip > > On Tue, Apr 24, 2012 at 10:36 PM, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote: > > On Tue, Apr 24, 2012 at 09:27:30PM +0200, K. Macy wrote: > > > >> Known problem. There is an open disagreement about how to improve the > >> granularity of locking in pmap. > > > > split locking to process-specific information and global information? > > use lock-free lists (i see TAILQ_INSERT_TAIL in pmap_enter)? > > > > sorry for stupidity, if any. > > > > -- > š š?The real damage is done by those millions who want to 'get by.' > The ordinary men who just want to be left in peace. Those who don?t > want their little lives disturbed by anything bigger than themselves. > Those with no sides and no causes. Those who won?t take measure of > their own strength, for fear of antagonizing their own weakness. Those > who don?t like to make waves?or enemies. > > š šThose for whom freedom, honour, truth, and principles are only > literature. Those who live small, love small, die small. It?s the > reductionist approach to life: if you keep it small, you?ll keep it > under control. If you don?t make any noise, the bogeyman won?t find > you. > > š šBut it?s all an illusion, because they die too, those people who > roll up their spirits into tiny little balls so as to be safe. Safe?! > >From what? Life is always on the edge of death; narrow streets lead to > the same place as wide avenues, and a little candle burns itself out > just like a flaming torch does. > > š šI choose my own way to burn.? > > š šSophie Scholl
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