2010/11/18 Bruce Cran <br...@cran.org.uk>: >Have you tried increasing kern.sched.preempt_thresh? According to >http://groups.google.com/group/mailing.freebsd.stable/browse_thread/thread/05a39f816fd8acc6/82affa9f195b747d?lnk=raot&fwc=1&pli=1 >a good value for desktop use would be 224.
Hmm, I though I tried this -- but this helps indeed. :-) The browser, movie player etc. behave much better when a "make -j4 buildworld" is running on my 2-core machine in the background. Thank you. 2010/11/18 Bruce Cran <br...@cran.org.uk>: > If you're using UFS, I've found it to be quite a bottleneck when > doing parallel IO: I even ran a "svn up" in one terminal and tried to > login on another a couple of days ago only to find the motd took over 5 > seconds to appear! That may be excessive since I was running a kernel > with WITNESS and INVARIANTS, but I've found ZFS to be far better if you > want good interactivity when reading/writing to disks. This is indeed another issue, which I also encountered, but explicitly left out since I don't blame the task scheduler for that. ;) Unfortunately, I don't know how much SCHED_ULE's inability to cope with more runnable threads than cores, as Steve mentioned, accounts to the problem I observe. Time to switch back to SCHED_4BSD? *sigh* Lucius _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "freebsd-performance-unsubscr...@freebsd.org"
