... wrote: > I noticed that my network performance has gone down from ... MBytes 95.0 Mbits/sec > to [ 3] 0.0-10.0 ... tracked it back to the commit where CFS > was enabled ("sched ... the resulting debug file. Ingo - To unsubscribe from this list: send ...

linux-kernel - Ingo Molnar - Sep 26 2007 - 05:34

... The ideal > solution is of course to almost never use yield. Fortunately 99 ... to boast a little: "( another detail: due to nanosec accounting and timeline sorting ... have tested so far. )" [Documentation/sched-design-CFS.txt] Cheers, Jarek P. - ...

linux-kernel - Jarek Poplawski - Oct 3 2007 - 04:02

... wrote: > I noticed that my network performance has gone down from 2 ... and tracked it back to the commit where CFS > was enabled ("sched: ... might be a worth while to try it without it. -Mike ... the body of a message to majordomo@vger.kernel.org More ...

linux-kernel - Mike Galbraith - Sep 26 2007 - 06:23

... away) is _not_ maintained directly in CFS as a > > per-task variable that ... in sched-design-CFS.txt too. ok - i've re-read it and ... ll improve the wording. (sched-design-CFS.txt needs an update anyway) Ingo - To unsubscribe from this list: send the ...

linux-kernel - Ingo Molnar - Oct 7 2007 - 03:18

... fix would be for iperf to use blocking network IO > > though, or maybe ... rise. Ingo: Can you clarify what CFS' current default sched_yield implementation is and ... this thread is scheduled again)? DS - To unsubscribe from this list: send the ...

linux-kernel - David Schwartz - Sep 26 2007 - 08:00

... so, it would be very difficult to find. > [...] google.com/codesearch is your friend. ... I'm not familiar enough with CFS' internals to help much on the > ... Linux apps follow that ideal solution ;-) ] Ingo - To unsubscribe from this list: send the ...

linux-kernel - Ingo Molnar - Oct 2 2007 - 02:06

... timeslice length' - timeslices in CFS are of variable length. > > > * (to see the precise ... of timeslice length" is difficult to understand? The timeslices of tasks ( ... see new sched_slice() function which seems > to return... time.) wrong again. That ...

linux-kernel - Ingo Molnar - Oct 3 2007 - 05:10

... timeslice length' - timeslices in CFS are of variable length. > > > > * (to see the ... of timeslice length" is difficult to understand? The timeslices > of tasks ( ... new sched_slice() function which seems > > to return... time.) > > wrong again. That ...

linux-kernel - Jarek Poplawski - Oct 3 2007 - 05:50

... > http://people.redhat.com/mingo/cfs-scheduler/tools/cfs-debug-info.sh > > ... the two cases can be compared) Ingo - To unsubscribe from this list: send the line ... kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info ...

linux-kernel - Ingo Molnar - Sep 26 2007 - 05:47

... time to saturate 1 gigabit of network traffic to another box. With the patch ... or other bug. In that sense CFS does the right thing by exposing such bugs =B-) Ingo -------------------------> Subject: iperf: fix locking From: Ingo Molnar < ...

linux-kernel - Ingo Molnar - Sep 26 2007 - 09:31

... saturate 1 gigabit of > network traffic to another box. With the ... removed altogether > > - i was able to measure much higher bandwidth over ... other > bug. In that sense CFS does the right thing by ... the body of a message to majordomo@vger.kernel.org More ...

linux-kernel - Stephen Hemminger - Sep 26 2007 - 11:40

... notion of "timeslices" in CFS. (in CFS tasks > > "earn" a right ... length' - timeslices in CFS are of variable length. > * (to see the ... there is no pending timeslice to be "cleared" as it has ... the body of a message to majordomo@vger.kernel.org More ...

linux-kernel - Ingo Molnar - Oct 3 2007 - 04:16

... would be for iperf to use blocking network IO >>>> though, or ... other > bug. In that sense CFS does the right thing by ... different kind? Regards, Jarek P. - To unsubscribe from this list: send ... the body of a message to majordomo@vger.kernel.org More ...

linux-kernel - Jarek Poplawski - Sep 27 2007 - 05:30

... but SCHED_FIFO/RR tasks (for which tasks CFS does keep the behavior). Please read ... lkml for a more detailed background: CFS: some bad numbers with Java/database ... the twiddling of that sysctl). Ingo - To unsubscribe from this list: send the ...

linux-kernel - Ingo Molnar - Sep 27 2007 - 05:46

... it releases these > > locks, it calls yield before re-acquiring them ... will be one-time requeued to > the right end of the ... not familiar enough with CFS' internals to help much on the ... the time, if possible?) DS - To unsubscribe from this list: send ...

linux-kernel - David Schwartz - Oct 1 2007 - 14:23

... lkml for a more detailed > background: > > CFS: some bad numbers with Java/database ... some 'compatibility' test could be prepared to compare a few different ideas on ... by next kernels? Thanks, Jarek P. - To unsubscribe from this list: send the ...

linux-kernel - Jarek Poplawski - Sep 27 2007 - 08:27

... length' - timeslices in CFS are of variable length. > > * (to see the ... new sched_slice() function which seems to return... time.) > > In the 2 ... you count eg. in check_preempt_curr_fair to find if time is over ... and you didn't care to explain why it's so ...

linux-kernel - Jarek Poplawski - Oct 3 2007 - 04:56

... lkml for a more detailed > > background: > > > > CFS: some bad numbers with Java/database ... 'compatibility' test could be prepared to compare > a few different ideas on ... above - hence the switch.) Ingo - To unsubscribe from this list: send the ...

linux-kernel - Ingo Molnar - Sep 27 2007 - 09:31

... it releases these > locks, it calls yield before re-acquiring them ... well when the > > discussion shifts to yield behavior, because that shows ... time requeued to the right end of the CFS rbtree. This ... moment] - nor will it map to the old scheduler's yield ...

linux-kernel - Ingo Molnar - Oct 1 2007 - 13:31

... iperf? (does it saturate full 100mbit network bandwidth) Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at ...

linux-kernel - Ingo Molnar - Sep 27 2007 - 06:56