Messages in this thread | | | Date | Thu, 06 May 2010 09:11:18 +0200 | From | Tejun Heo <> | Subject | Re: [RFC PATCHSET] sched,perf: unify tracers in sched and move perf on top of TP |
| |
Hello,
On 05/06/2010 08:28 AM, Ingo Molnar wrote: > ( They are also under intense optimization - the jump-tracepoints patch makes > them probably even cheaper than preempt notifiers, in the off case. )
I mostly agree on other points but TPs and sched_notifiers are inherently different in how they are enabled/disabled. sched_notifiers are enabled/disabled per-task and at least w/ cmwq, there will always be some tasks with active sched_notifiers so code level optimizations aren't really useful.
Thanks.
-- tejun
| |