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| author | Nicholas Piggin <npiggin@gmail.com> | 2019-04-12 14:26:13 +1000 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-04-29 08:27:03 +0200 |
| commit | 9b019acb72e4b5741d88e8936d6f200ed44b66b2 (patch) | |
| tree | e7f8828759e3a56d22c1b6a0e2a969a184c31c41 /net/sched/sch_cbq.c | |
| parent | ad2e379def135ebc079f89a0e0b1d987d243f949 (diff) | |
| download | linux-9b019acb72e4b5741d88e8936d6f200ed44b66b2.tar.gz | |
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 <npiggin@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20190412042613.28930-1-npiggin@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'net/sched/sch_cbq.c')
0 files changed, 0 insertions, 0 deletions