Messages in this thread | | | Date | Mon, 10 May 2010 07:48:54 +0200 | From | Tejun Heo <> | Subject | Re: [RFC PATCHSET] sched,perf: unify tracers in sched and move perf on top of TP |
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Hello,
On 05/10/2010 07:20 AM, Paul Mackerras wrote: > Don't forget where perf_events started out - as a way to count and > record hardware events. So perf_events is very useful even in a > kernel that has no tracing infrastructure configured in at all.
Alright, but I don't think it's very relevant to worry about !CONFIG_TRACEPOINTS && CONFIG_PERF_EVENTS case as long as both can be compiled out. TPs are supposed to have very low to almost no runtime overhead and building them into the kernel shouldn't cost all that much either (I hear that it has been improved lately). Sure, perf can be used w/o TPs but I can't see what that configurability buys us.
Thanks.
-- tejun
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