| commit | 669c55e9f99b90e46eaa0f98a67ec53d46dc969a | [log] [tgz] |
|---|---|---|
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | Fri Apr 16 14:59:29 2010 +0200 |
| committer | Ingo Molnar <mingo@elte.hu> | Fri Apr 23 11:02:02 2010 +0200 |
| tree | 9f60bcf779e5ec786c05b8053b59e091edcb418c | |
| parent | 74f5187ac873042f502227701ed1727e7c5fbfa9 [diff] |
sched: Pre-compute cpumask_weight(sched_domain_span(sd)) Dave reported that his large SPARC machines spend lots of time in hweight64(), try and optimize some of those needless cpumask_weight() invocations (esp. with the large offstack cpumasks these are very expensive indeed). Reported-by: David Miller <davem@davemloft.net> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>