Messages in this thread | | | Date | Mon, 1 Aug 2011 22:00:00 +0200 | Subject | Re: [PATCH] Add sched_clock to AT91 TCB clocksource driver | From | Remy Bohmer <> |
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Hi,
>> But late_time_init does it before the sched_clock is declared stable. >> Until that point sched_clock will always return zero, as such we can >> IMHO safely assume that the scheduler is designed such that it can >> handle fixed zero timestamps for a while. > > You're confused. > > If you provide your own sched_clock(), that's what is used by everyone > who calls sched_clock() both before and after sched_clock_init() has > been called. > > sched_clock_cpu() and cpu_clock() both will return zero up until > sched_clock_init() has been called, but sched_clock() itself may not. > > And these parts of the scheduler I'm talking about use sched_clock() > itself, not sched_clock_cpu() nor cpu_clock().
Yep. You are right. I was confused... Sorry.
Kind regards,
Remy
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