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Date: Tue, 03 Apr 2007 07:31:10 +0200 From: Mike Galbraith <efault@....de> To: Con Kolivas <kernel@...ivas.org> Cc: Ingo Molnar <mingo@...e.hu>, linux list <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, ck list <ck@....kolivas.org> Subject: Re: [PATCH] sched: staircase deadline misc fixes On Tue, 2007-04-03 at 12:37 +1000, Con Kolivas wrote: > On Thursday 29 March 2007 15:50, Mike Galbraith wrote: > > On Thu, 2007-03-29 at 09:44 +1000, Con Kolivas wrote: > > + * This contains a bitmap for each dynamic priority level with empty slots > > + * for the valid priorities each different nice level can have. It allows > > + * us to stagger the slots where differing priorities run in a way that > > + * keeps latency differences between different nice levels at a minimum. > > + * ie, where 0 means a slot for that priority, priority running from left > > to + * right: > > + * nice -20 0000000000000000000000000000000000000000 > > + * nice -10 1001000100100010001001000100010010001000 > > + * nice 0 0101010101010101010101010101010101010101 > > + * nice 5 1101011010110101101011010110101101011011 > > + * nice 10 0110111011011101110110111011101101110111 > > + * nice 15 0111110111111011111101111101111110111111 > > + * nice 19 1111111111111111111011111111111111111111 > > Try two instances of chew.c at _differing_ nice levels on one cpu on mainline, > and then SD. This is why you can't renice X on mainline. How about something more challenging instead :) The numbers below are from my scheduler tree with massive_intr running at nice 0, and chew at nice 5. Below these numbers are 100 lines from the exact center of chew's output. (interactivity remains intact with this rather heavy load) root@...er: ./massive_intr 30 180 005671 00001506 005657 00001506 005651 00001491 005647 00001466 005661 00001484 005660 00001475 005645 00001514 005668 00001384 005673 00001516 005656 00001449 005664 00001512 005659 00001507 005667 00001513 005663 00001521 005670 00001440 005649 00001522 005652 00001487 005648 00001405 005665 00001472 005669 00001418 005662 00001489 005674 00001523 005650 00001480 005655 00001476 005672 00001530 005653 00001463 005654 00001427 005646 00001499 005658 00001510 005666 00001476 100 sequential lines from the middle of chew's logged output. pid 5642, prio 5, out for 2 ms, ran for 1 ms, load 34% pid 5642, prio 5, out for 1268 ms, ran for 63 ms, load 4% pid 5642, prio 5, out for 52 ms, ran for 0 ms, load 0% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 14% pid 5642, prio 5, out for 9 ms, ran for 1 ms, load 12% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 15% pid 5642, prio 5, out for 9 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 15% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 12% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 18% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 11% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 18% pid 5642, prio 5, out for 4 ms, ran for 1 ms, load 22% pid 5642, prio 5, out for 1395 ms, ran for 50 ms, load 3% pid 5642, prio 5, out for 26 ms, ran for 0 ms, load 3% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 15% pid 5642, prio 5, out for 9 ms, ran for 1 ms, load 11% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 13% pid 5642, prio 5, out for 7 ms, ran for 0 ms, load 11% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 11% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 14% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 20% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 14% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 13% pid 5642, prio 5, out for 1400 ms, ran for 53 ms, load 3% pid 5642, prio 5, out for 22 ms, ran for 1 ms, load 6% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 18% pid 5642, prio 5, out for 9 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 2 ms, ran for 1 ms, load 49% pid 5642, prio 5, out for 1281 ms, ran for 50 ms, load 3% pid 5642, prio 5, out for 50 ms, ran for 0 ms, load 1% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 15% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 16% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 13% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 11% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 12% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 4 ms, ran for 1 ms, load 31% pid 5642, prio 5, out for 1248 ms, ran for 53 ms, load 4% pid 5642, prio 5, out for 44 ms, ran for 0 ms, load 1% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 16% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 9 ms, ran for 1 ms, load 15% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 11% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 15% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 13% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 15% pid 5642, prio 5, out for 1311 ms, ran for 55 ms, load 4% pid 5642, prio 5, out for 121 ms, ran for 0 ms, load 0% pid 5642, prio 5, out for 22 ms, ran for 0 ms, load 1% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 16% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 18% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 12% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 16% pid 5642, prio 5, out for 6 ms, ran for 1 ms, load 14% pid 5642, prio 5, out for 1289 ms, ran for 50 ms, load 3% pid 5642, prio 5, out for 38 ms, ran for 0 ms, load 1% pid 5642, prio 5, out for 9 ms, ran for 1 ms, load 14% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 19% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 12% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 15% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 14% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 16% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 14% pid 5642, prio 5, out for 9 ms, ran for 1 ms, load 11% pid 5642, prio 5, out for 6 ms, ran for 1 ms, load 22% pid 5642, prio 5, out for 1348 ms, ran for 53 ms, load 3% pid 5642, prio 5, out for 8 ms, ran for 0 ms, load 10% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 15% pid 5642, prio 5, out for 7 ms, ran for 0 ms, load 11% pid 5642, prio 5, out for 8 ms, ran for 1 ms, load 12% pid 5642, prio 5, out for 1385 ms, ran for 65 ms, load 4% pid 5642, prio 5, out for 1385 ms, ran for 74 ms, load 5% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 7 ms, ran for 1 ms, load 17% pid 5642, prio 5, out for 6 ms, ran for 1 ms, load 20% pid 5642, prio 5, out for 1375 ms, ran for 66 ms, load 4% - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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