Date: Thu, 23 Apr 2009 20:09:18 -0400 From: Kage <kagekonjou@gmail.com> To: Miroslav Lachman <000.fbsd@quip.cz> Cc: =?KOI8-R?B?7cXO2NvJy8/XIOvPztPUwc7Uyc4=?= <k.menshikov@peterhost.ru>, freebsd-jail@freebsd.org Subject: Re: CPU limit for Jails(patch for ULE scheduler) Message-ID: <d1556b2b0904231709t1b88a4beifcf14fd8d13a685e@mail.gmail.com> In-Reply-To: <49EE42C5.3010409@quip.cz> References: <49EC926D.6020404@peterhost.ru> <49EE42C5.3010409@quip.cz>
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I'm definitely interested in this patch. I can see some good work coming from this. However, at this time, I do not have a development FreeBSD server I can heavily test this on. I'm definitely looking forward to a "stable" patch of this, and will make use of it. Please keep us informed! 2009/4/21 Miroslav Lachman <000.fbsd@quip.cz>: > íÅÎØÛÉËÏ× ëÏÎÓÔÁÎÔÉÎ wrote: >> >> Hello all! >> Many users want have limits on resourse for jail, for examle cpu and >> memory limit. >> I`m rewrire original cdjones patch šfor cpu limit for jail under ULE >> scheduler. >> So, šthis work simple. >> We count cpu usage for all jails, and if jail use cpu more than have >> shared cpu, we move his threads to IDLE queue and return to TIMESHARE in >> šreverse case. >> Jailed thread can use all avaliable cpu time, if šsystem has avaliable >> cpu. >> If system under heavy load, jailed thread can`t use cpu long as ratio >> (shared cpu for jail/ all shared cpu) < (estimate usage cpu for jail / >> all usage cpu) . >> Unjailed thread and interactive thread are not subject to this regime. >> Add 2 sysctl >> kern.sched.total_sched_shares - total count shares cpu in system, >> increase if we have more cpu >> kern.sched.flush_estcpu_interval - flush estcpu interval in ticks, >> default is 2560 = 2 * 128 * 10, NCPU*stathz*sec, increase if we have >> more cpu >> For use cpu limit, you need use flag -S NSharedCPU in /usr/sbin/jail >> program. >> My example jail -S100 /usr/jails/root/ root.kostjn.pht š192.168.0.245 >> /bin/csh >> >> I`m tested this under 10 simultaneous process in jail and in main >> system. test program is infinity cycle an 8 core xeon, use RELENG_7. >> First run process in jail, and after in main system. >> This one process tracking cpu usage > > [...] > >> So we see, that after run in main system, jailed process can`t usage cpu. >> >> Please communicate me šabout all problem in this patch. >> This is initial version, without tune jail parameter in runtime. >> >> So, this work. But i`m not sure, that is best way. >> >> Attempt increase priority for jailed thread not work, because non >> interactive thread (that utilize many cpu) already have small >> prioriry(numerical high). >> Attempt decrease number ticks in cpu time slice, also not good idea, >> because, this increase number context switching on high load. >> May be you see other way for do this? >> Share you idea. >> >> Thank. >> Original cdjones šcpu and memory limit patch >> http://wiki.freebsd.org/JailResourceLimits > > Hello, > I can't judge your work / patch as I am not developer nor C programmer. But > it is nice to see that someone is working on the resource limits. I am > waiting for this feature for a years without success. The original SoC > project was never done (not production ready). There were attempts by others > to update cdjones patch to newer versions of FreeBSD, but still with some > minor problems. The last I remember is "Memory limits on 7.0" by Christopher > Thunes (e-mail in archive of this list from 2008-06-24). Unfortunately I had > not time to test his patch in times of 7.0 and I am not aware of any newer > version of this patch (for 7.1 or upcoming 7.2). > > It would be nice if independent developers can work together on this subject > and do this work production / commit ready. > > May be you should open PR with you patch, so anybody can find it, test it > and help to make it better. Or if you have own web page with this patch + > some documentation, I can put the link to http://wiki.freebsd.org/Jails > > Can you take a look to Memory limits patch and incorporate it in to your > patch? > > Do you have a plan to add jtune? > > Thanks for your work, I hope I will have time to test it in few weeks. > > Miroslav Lachman > _______________________________________________ > freebsd-jail@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-jail > To unsubscribe, send any mail to "freebsd-jail-unsubscribe@freebsd.org" > -- ~ Kage http://vitund.com http://hackthissite.orghome | help
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