diff options
| author | Nicholas Piggin <[email protected]> | 2019-04-12 14:26:13 +1000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2019-04-29 08:27:03 +0200 |
| commit | 9b019acb72e4b5741d88e8936d6f200ed44b66b2 (patch) | |
| tree | e7f8828759e3a56d22c1b6a0e2a969a184c31c41 /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | ad2e379def135ebc079f89a0e0b1d987d243f949 (diff) | |
sched/nohz: Run NOHZ idle load balancer on HK_FLAG_MISC CPUs
The NOHZ idle balancer runs on the lowest idle CPU. This can
interfere with isolated CPUs, so confine it to HK_FLAG_MISC
housekeeping CPUs.
HK_FLAG_SCHED is not used for this because it is not set anywhere
at the moment. This could be folded into HK_FLAG_SCHED once that
option is fixed.
The problem was observed with increased jitter on an application
running on CPU0, caused by NOHZ idle load balancing being run on
CPU1 (an SMT sibling).
Signed-off-by: Nicholas Piggin <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions