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| author | Huang Shijie <shijie@os.amperecomputing.com> | 2024-10-01 15:00:21 +0800 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2024-10-07 09:28:41 +0200 |
| commit | 4423af84b29794a9bd2bd07188d8e71083e54c61 (patch) | |
| tree | 67bbb27844d1ee2508dd677cbb49515851af65e9 /kernel/locking/rtmutex_api.c | |
| parent | e31488c9df27aaea2cdffba688129fdeb3869650 (diff) | |
| download | linux-4423af84b29794a9bd2bd07188d8e71083e54c61.tar.gz linux-4423af84b29794a9bd2bd07188d8e71083e54c61.tar.bz2 linux-4423af84b29794a9bd2bd07188d8e71083e54c61.zip | |
sched/fair: optimize the PLACE_LAG when se->vlag is zero
When PLACE_LAG is enabled, from the relationship:
vl_i = (W + w_i)*vl'_i / W
we know that if vl'_i(se->vlag) is zero, the vl_i is zero too.
So if se->vlag is zero, there is no need to waste cycles to
do the calculation.
Signed-off-by: Huang Shijie <shijie@os.amperecomputing.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Christoph Lameter (Ampere) <cl@linux.com>
Link: https://lkml.kernel.org/r/20241001070021.10626-1-shijie@os.amperecomputing.com
Diffstat (limited to 'kernel/locking/rtmutex_api.c')
0 files changed, 0 insertions, 0 deletions