Date: Thu, 3 Nov 2011 11:22:28 -1000 (HST) From: Jeff Roberson <jroberson@jroberson.net> To: Ivan Klymenko <fidaj@ukr.net> Cc: freebsd-current@freebsd.org Subject: Re: Increase the degree of interactivity ULE scheduler Message-ID: <alpine.BSF.2.00.1111031120340.1995@desktop> In-Reply-To: <4eb3032e.a82eec0a.12ad.ffff8d64SMTPIN_ADDED@mx.google.com> References: <4ea29f2c.a823440a.4aa0.3599SMTPIN_ADDED@mx.google.com> <alpine.BSF.2.00.1111031018030.1995@desktop> <4eb3032e.a82eec0a.12ad.ffff8d64SMTPIN_ADDED@mx.google.com>
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On Thu, 3 Nov 2011, Ivan Klymenko wrote: > Thank you for taking the time to answer me. > > ? Thu, 3 Nov 2011 10:21:48 -1000 (HST) > Jeff Roberson <jroberson@jroberson.net> ?????: > >> On Sat, 22 Oct 2011, Ivan Klymenko wrote: >> >>> Hello people! >>> >>> I have: >>> CPU: Intel(R) Core(TM)2 Duo CPU T7250 @ 2.00GHz (1994.48-MHz >>> K8-class CPU) FreeBSD 10.0-CURRENT r226607 amd64 >>> >>> For example during the building of the port lang/gcc46 in four >>> streams (-j 4) with a heavy load on the processor - use the system >>> was nearly impossible - responsiveness was terrible - the mouse >>> cursor sometimes froze on the spot a few seconds... >> >> Am I right in understanding that you have only two cores? > > Yes. > >> What else is running that achieves poor interactivity? > > This is mainly a compilation with make option -j >= ncpu*2 > And as an example - launching a large number of programs > http://www.youtube.com/watch?v=1CLCp-dqWu0 > This patch allows me to make do with ULE nearly as well as with FBFS > Without the patch, somewhere in the middle of the time with ULE has > been difficult to control the mouse cursor. > >> What is the cpu utilization of your x server at this time? > > ~2.00% - 20.00% WCPU time... But sometimes there are up to 79%... > Upon unloading the CPU returns to normal... When the x server is down at 20% is it laggy? Can you tell me the priorities of the x server and the compile tasks? You can use the 'pri' keyword with ps and write a short script to log all priorities once per second during your test. That would be most helpful. Let me know if you need assistance with that. Jeff > >> >>> >>> I managed to achieve a significant increase in the degree of >>> interactivity ULE scheduler due to the following changes: >> >> This patch probably breaks nice, adaptive idling, and slows the >> interactivity computation. That being said I'm not sure why it helps >> you. >> >> It seems that there are increasing reports of bad interactivity >> creeping in to ULE over the last year. If people can help provide me >> with data I can look into this more. >> > > I'll be glad to provide data > >> Thanks for your report. >> >> Jeff > > How to repeat your tests on my system? > http://jeffr-tech.livejournal.com/24280.html > > Sorry for my english. > > Thanks! >
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