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| author | Frederic Weisbecker <[email protected]> | 2021-05-12 23:29:20 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2021-05-13 12:21:22 +0000 |
| commit | 29721b859217b946bfc001c1644745ed4d7c26cb (patch) | |
| tree | 8aab4cf88fd7900e62215aa2d1f92c6fefed6d8f /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | tick/nohz: Update nohz_full Kconfig help (diff) | |
| download | kernel-29721b859217b946bfc001c1644745ed4d7c26cb.tar.gz kernel-29721b859217b946bfc001c1644745ed4d7c26cb.zip | |
tick/nohz: Only wake up a single target cpu when kicking a task
When adding a tick dependency to a task, its necessary to
wake up the CPU where the task resides to reevaluate tick
dependencies on that CPU.
However the current code wakes up all nohz_full CPUs, which
is unnecessary.
Switch to waking up a single CPU, by using ordering of writes
to task->cpu and task->tick_dep_mask.
[ mingo: Minor readability edit. ]
Suggested-by: Peter Zijlstra <[email protected]>
Signed-off-by: Frederic Weisbecker <[email protected]>
Signed-off-by: Marcelo Tosatti <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
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