Messages in this thread | | | From | Ricardo Galli <> | Subject | HELP: cpufreq on HT and/or SMP systems | Date | Thu, 31 Jul 2003 23:53:54 +0200 |
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I have some doubts regarding cpufreq for SMP systems (for developing http://mnm.uib.es/~gallir/cpudyn/).
If I remember well, I read a while ago that cpufreq didn't work in SMP systems, but reading the docs and kernel/cpufreq.c, it seems there should be any problem?
Is it true?
OTH, I trying it on a P4 HT, and it works, changes in the frequency of one of the "cpu's", changes both.
What happens in the case of several real cpu's? Does it keep the same frequency for every cpu? According to a comment in cpufreq.c, it seems that each cpu might have different frequencies.
So, what's recommended? Change the frequency of every cpu one by one?
Thanks,
PS: sorry, I don't have any cpufreq/SMP machine at hand.
-- ricardo galli GPG id C8114D34 http://mnm.uib.es/~gallir/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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