Skip to content

L
linux
Switch branch/tag
  1. 26 Jul, 2007 7 commits
    • Con Kolivas's avatar
      [PATCH] sched: add above_background_load() function · d02c7a8c
      Con Kolivas authored 
      Add an above_background_load() function which can be used by other
subsystems to detect if there is anything besides niced tasks running.

Place it in sched.h to allow it to be compiled out if not used.

Unused for now, but it is a useful hint to the IO scheduler and to
swap-prefetch.
Signed-off-by: default avatarCon Kolivas <kernel@kolivas.org>
Cc: Peter Williams <pwil3058@bigpond.net.au>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      d02c7a8c
    • Joachim Deguara's avatar
      [PATCH] sched: update Documentation/sched-stats.txt · b762f3ff
      Joachim Deguara authored 
      While learning about schedstats I found that the documentation in the tree
is old.  I updated it and found some interesting stuff like schedstats
version 14 is the same as version and version 13 never saw a kernel
release!  Also there are 6 fields in the current schedstats that are not
used anymore.  Nick had made them irrelevant in commit
476d139c but never removed them.

Thanks to Rick's perl script who I borrowed some of the updated descriptions
from.
Signed-off-by: default avatarJoachim Deguara <joachim.deguara@amd.com>
Acked-by: default avatarNick Piggin <npiggin@suse.de>
Cc: Rick Lindsley <ricklind@us.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      b762f3ff
    • Josh Triplett's avatar
      [PATCH] sched: mark sysrq_sched_debug_show() static · f3373461
      Josh Triplett authored 
      Only sched.c uses sysrq_sched_debug_show, and sched.c includes sched_debug.c,
so all uses of sysrq_sched_debug_show occur in the same source file.

Eliminates a sparse warning:
warning: symbol 'sysrq_sched_debug_show' was not declared. Should it be static?
Signed-off-by: default avatarJosh Triplett <josh@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      f3373461
    • Ingo Molnar's avatar
      [PATCH] sched: make cpu_clock() not use the rq clock · 2cd4d0ea
      Ingo Molnar authored 
      it is enough to disable interrupts to get the precise rq-clock
of the local CPU.

this also solves an NMI watchdog regression: the NMI watchdog
calls touch_softlockup_watchdog(), which might deadlock on
rq->lock if the NMI hits an rq-locked critical section.
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      2cd4d0ea
    • Satoru Takeuchi's avatar
      [PATCH] sched: remove unused rq->load_balance_class · 018a2212
      Satoru Takeuchi authored 
      Remove unused rq->load_balance_class.
Signed-off-by: default avatarSatoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      018a2212
    • Avi Kivity's avatar
      [PATCH] sched: arch preempt notifier mechanism · e107be36
      Avi Kivity authored 
      This adds a general mechanism whereby a task can request the scheduler to
notify it whenever it is preempted or scheduled back in.  This allows the
task to swap any special-purpose registers like the fpu or Intel's VT
registers.
Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
[ mingo@elte.hu: fixes, cleanups ]
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      e107be36
    • Ingo Molnar's avatar
      [PATCH] sched: increase SCHED_LOAD_SCALE_FUZZ · b47e8608
      Ingo Molnar authored 
      increase SCHED_LOAD_SCALE_FUZZ that adds a small amount of
over-balancing: to help distribute CPU-bound tasks more fairly on SMP
systems.

the problem of unfair balancing was noticed and reported by Tong N Li.

10 CPU-bound tasks running on 8 CPUs, v2.6.23-rc1:

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 2572 mingo     20   0  1576  244  196 R  100  0.0   1:03.61 loop
 2578 mingo     20   0  1576  248  196 R  100  0.0   1:03.59 loop
 2576 mingo     20   0  1576  248  196 R  100  0.0   1:03.52 loop
 2571 mingo     20   0  1576  244  196 R  100  0.0   1:03.46 loop
 2569 mingo     20   0  1576  244  196 R   99  0.0   1:03.36 loop
 2570 mingo     20   0  1576  244  196 R   95  0.0   1:00.55 loop
 2577 mingo     20   0  1576  248  196 R   50  0.0   0:31.88 loop
 2574 mingo     20   0  1576  248  196 R   50  0.0   0:31.87 loop
 2573 mingo     20   0  1576  248  196 R   50  0.0   0:31.86 loop
 2575 mingo     20   0  1576  248  196 R   50  0.0   0:31.86 loop

v2.6.23-rc1 + patch:

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 2681 mingo     20   0  1576  244  196 R   85  0.0   3:51.68 loop
 2688 mingo     20   0  1576  244  196 R   81  0.0   3:46.35 loop
 2682 mingo     20   0  1576  244  196 R   80  0.0   3:43.68 loop
 2685 mingo     20   0  1576  248  196 R   80  0.0   3:45.97 loop
 2683 mingo     20   0  1576  248  196 R   80  0.0   3:40.25 loop
 2679 mingo     20   0  1576  244  196 R   80  0.0   3:33.53 loop
 2680 mingo     20   0  1576  244  196 R   79  0.0   3:43.53 loop
 2686 mingo     20   0  1576  244  196 R   79  0.0   3:39.31 loop
 2687 mingo     20   0  1576  244  196 R   78  0.0   3:33.31 loop
 2684 mingo     20   0  1576  244  196 R   77  0.0   3:27.52 loop

so they now nicely converge to the expected 80% long-term CPU usage.
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      b47e8608
  3. 25 Jul, 2007 33 commits
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7