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17 May 2024, 11:00:25 UTC
Revision 1799e35d5baab6e06168b46cc78b968e728ea3d1 authored by Ingo Molnar on 19 September 2007, 21:34:46 UTC, committed by Ingo Molnar on 19 September 2007, 21:34:46 UTC 
sched: add /proc/sys/kernel/sched_compat_yield
 
add /proc/sys/kernel/sched_compat_yield to make sys_sched_yield()
more agressive, by moving the yielding task to the last position
in the rbtree.

with sched_compat_yield=0:

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  2539 mingo     20   0  1576  252  204 R   50  0.0   0:02.03 loop_yield
  2541 mingo     20   0  1576  244  196 R   50  0.0   0:02.05 loop

with sched_compat_yield=1:

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  2584 mingo     20   0  1576  248  196 R   99  0.0   0:52.45 loop
  2582 mingo     20   0  1576  256  204 R    0  0.0   0:00.00 loop_yield

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
1 parent a88a8ef
History
Tip revision: 1799e35d5baab6e06168b46cc78b968e728ea3d1 authored by Ingo Molnar on 19 September 2007, 21:34:46 UTC
sched: add /proc/sys/kernel/sched_compat_yield
Tip revision: 1799e35
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