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| author | Vincent Donnefort <vincent.donnefort@arm.com> | 2022-06-21 12:04:08 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-06-28 10:17:46 +0300 |
| commit | d05b43059dfa115037cd37bc276a8316391def28 (patch) | |
| tree | ea26f09e40de853767e83d285751b900115386b6 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 70fb5ccf2ebb09a0c8ebba775041567812d45f86 (diff) | |
| download | linux-d05b43059dfa115037cd37bc276a8316391def28.tar.xz | |
sched/fair: Provide u64 read for 32-bits arch helper
Introducing macro helpers u64_u32_{store,load}() to factorize lockless
accesses to u64 variables for 32-bits architectures.
Users are for now cfs_rq.min_vruntime and sched_avg.last_update_time. To
accommodate the later where the copy lies outside of the structure
(cfs_rq.last_udpate_time_copy instead of sched_avg.last_update_time_copy),
use the _copy() version of those helpers.
Those new helpers encapsulate smp_rmb() and smp_wmb() synchronization and
therefore, have a small penalty for 32-bits machines in set_task_rq_fair()
and init_cfs_rq().
Signed-off-by: Vincent Donnefort <vincent.donnefort@arm.com>
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lkml.kernel.org/r/20220621090414.433602-2-vdonnefort@google.com
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions