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Re: [PATCH] perf, x86: try to handle unknown nmis with running perfctrs

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From: Huang Ying
Subject: Re: [PATCH] perf, x86: try to handle unknown nmis with running perfctrs
Date: Tuesday, August 10, 2010 - 8:19 pm

On Wed, 2010-08-11 at 04:48 +0800, Don Zickus wrote:

You can trigger unknown NMIs via apic->send_IPI_mask(cpu_mask,
NMI_VECTOR).

How about the algorithm as follow:

int perf_event_nmi_handler()
{
	...
	switch (cmd) {
	case DIE_NMIUNKNOWN:
		if (per_cpu(perfctr_prev_handled) > 1
		    && rdtsc() - per_cpu(perfctr_handled_timestamp) < 1000)
			return NOTIFY_STOP;
		else
			return NOTIFY_DONE;
	}
	...
	handled = x86_pmu.handle_irq(regs);
	per_cpu(perfctr_prev_handled) = per_cpu(perfctr_handled);
	per_cpu(perfctr_handled) = handled;
	if (handled) {
		per_cpu(perfctr_handled_timestamp) = rdtsc();
		return NOTIFY_STOP;
	} else
		return NOTIFY_DONE;
}

Best Regards,
Huang Ying


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Messages in current thread:
A question of perf NMI handler, Lin Ming, (Wed Aug 4, 2:21 am)
Re: A question of perf NMI handler, Peter Zijlstra, (Wed Aug 4, 2:50 am)
Re: A question of perf NMI handler, Robert Richter, (Wed Aug 4, 3:01 am)
Re: A question of perf NMI handler, Peter Zijlstra, (Wed Aug 4, 3:24 am)
Re: A question of perf NMI handler, Robert Richter, (Wed Aug 4, 3:29 am)
Re: A question of perf NMI handler, Don Zickus, (Wed Aug 4, 6:54 am)
Re: A question of perf NMI handler, Don Zickus, (Wed Aug 4, 7:00 am)
Re: A question of perf NMI handler, Peter Zijlstra, (Wed Aug 4, 7:11 am)
Re: A question of perf NMI handler, Don Zickus, (Wed Aug 4, 7:52 am)
Re: A question of perf NMI handler, Peter Zijlstra, (Wed Aug 4, 8:02 am)
Re: A question of perf NMI handler, Cyrill Gorcunov, (Wed Aug 4, 8:18 am)
Re: A question of perf NMI handler, Don Zickus, (Wed Aug 4, 8:45 am)
Re: A question of perf NMI handler, Don Zickus, (Wed Aug 4, 8:50 am)
Re: A question of perf NMI handler, Cyrill Gorcunov, (Wed Aug 4, 9:10 am)
Re: A question of perf NMI handler, Don Zickus, (Wed Aug 4, 9:20 am)
Re: A question of perf NMI handler, Cyrill Gorcunov, (Wed Aug 4, 9:39 am)
Re: A question of perf NMI handler, Robert Richter, (Wed Aug 4, 11:48 am)
Re: A question of perf NMI handler, Andi Kleen, (Wed Aug 4, 12:22 pm)
Re: A question of perf NMI handler, Cyrill Gorcunov, (Wed Aug 4, 12:26 pm)
Re: A question of perf NMI handler, Robert Richter, (Thu Aug 5, 11:52 pm)
Re: A question of perf NMI handler, Don Zickus, (Fri Aug 6, 7:21 am)
Re: A question of perf NMI handler, Andi Kleen, (Fri Aug 6, 8:35 am)
Re: A question of perf NMI handler, Andi Kleen, (Fri Aug 6, 8:37 am)
[PATCH] perf, x86: try to handle unknown nmis with running ..., Robert Richter, (Mon Aug 9, 12:48 pm)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Cyrill Gorcunov, (Mon Aug 9, 1:02 pm)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Robert Richter, (Tue Aug 10, 12:42 am)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Cyrill Gorcunov, (Tue Aug 10, 9:16 am)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Robert Richter, (Tue Aug 10, 9:41 am)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Cyrill Gorcunov, (Tue Aug 10, 10:24 am)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Robert Richter, (Tue Aug 10, 12:05 pm)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Cyrill Gorcunov, (Tue Aug 10, 12:24 pm)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Don Zickus, (Tue Aug 10, 1:48 pm)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Frederic Weisbecker, (Tue Aug 10, 7:44 pm)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Huang Ying, (Tue Aug 10, 8:19 pm)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Robert Richter, (Wed Aug 11, 4:10 am)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Don Zickus, (Wed Aug 11, 5:36 am)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Don Zickus, (Wed Aug 11, 5:39 am)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Don Zickus, (Wed Aug 11, 5:44 am)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Robert Richter, (Wed Aug 11, 7:03 am)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Don Zickus, (Wed Aug 11, 7:32 am)
[PATCH -v2] perf, x86: try to handle unknown nmis with run ..., Robert Richter, (Wed Aug 11, 3:00 pm)
Re: [PATCH -v2] perf, x86: try to handle unknown nmis with ..., Robert Richter, (Thu Aug 12, 6:10 am)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Robert Richter, (Thu Aug 12, 6:24 am)
Re: [PATCH -v2] perf, x86: try to handle unknown nmis with ..., Don Zickus, (Thu Aug 12, 6:52 am)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Cyrill Gorcunov, (Thu Aug 12, 7:31 am)
Re: [PATCH -v2] perf, x86: try to handle unknown nmis with ..., Don Zickus, (Thu Aug 12, 11:21 am)
Re: [PATCH -v2] perf, x86: try to handle unknown nmis with ..., Frederic Weisbecker, (Thu Aug 12, 9:25 pm)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Frederic Weisbecker, (Thu Aug 12, 9:37 pm)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Robert Richter, (Fri Aug 13, 1:22 am)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Frederic Weisbecker, (Fri Aug 13, 6:28 pm)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Robert Richter, (Fri Aug 13, 7:29 pm)
Re: [PATCH -v2] perf, x86: try to handle unknown nmis with ..., Robert Richter, (Mon Aug 16, 12:37 am)
Re: [PATCH] perf, x86: try to handle unknown nmis with run ..., Peter Zijlstra, (Mon Aug 16, 7:37 am)
Re: [PATCH -v2] perf, x86: try to handle unknown nmis with ..., Peter Zijlstra, (Mon Aug 16, 7:48 am)
Re: [PATCH -v2] perf, x86: try to handle unknown nmis with ..., Cyrill Gorcunov, (Mon Aug 16, 9:27 am)
Re: [PATCH -v2] perf, x86: try to handle unknown nmis with ..., Robert Richter, (Mon Aug 16, 10:16 am)
Re: [PATCH -v2] perf, x86: try to handle unknown nmis with ..., Cyrill Gorcunov, (Mon Aug 16, 12:06 pm)
Re: [PATCH -v2] perf, x86: try to handle unknown nmis with ..., Peter Zijlstra, (Mon Aug 16, 12:13 pm)
Re: [PATCH -v2] perf, x86: try to handle unknown nmis with ..., Cyrill Gorcunov, (Mon Aug 16, 12:18 pm)
Re: [PATCH -v2] perf, x86: try to handle unknown nmis with ..., Robert Richter, (Mon Aug 16, 3:55 pm)
[PATCH -v3] perf, x86: try to handle unknown nmis with run ..., Robert Richter, (Tue Aug 17, 8:22 am)
Re: [PATCH -v2] perf, x86: try to handle unknown nmis with ..., Cyrill Gorcunov, (Tue Aug 17, 8:23 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Cyrill Gorcunov, (Tue Aug 17, 9:17 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Peter Zijlstra, (Thu Aug 19, 3:45 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Robert Richter, (Thu Aug 19, 5:39 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Don Zickus, (Thu Aug 19, 7:12 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Peter Zijlstra, (Thu Aug 19, 7:27 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Don Zickus, (Thu Aug 19, 8:20 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Cyrill Gorcunov, (Thu Aug 19, 10:43 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Peter Zijlstra, (Thu Aug 19, 10:53 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Don Zickus, (Thu Aug 19, 2:58 pm)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Don Zickus, (Thu Aug 19, 6:50 pm)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Ingo Molnar, (Fri Aug 20, 1:16 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Robert Richter, (Fri Aug 20, 1:36 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Peter Zijlstra, (Fri Aug 20, 1:50 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Peter Zijlstra, (Fri Aug 20, 3:04 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Cyrill Gorcunov, (Fri Aug 20, 3:30 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Don Zickus, (Fri Aug 20, 5:39 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Ingo Molnar, (Fri Aug 20, 6:27 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Don Zickus, (Fri Aug 20, 6:51 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Ingo Molnar, (Fri Aug 20, 7:17 am)
[tip:perf/urgent] perf, x86: Try to handle unknown nmis wi ..., tip-bot for Robert R ..., (Fri Aug 20, 7:17 am)
[tip:perf/urgent] perf, x86: Fix handle_irq return values, tip-bot for Peter Zi ..., (Fri Aug 20, 7:17 am)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Cyrill Gorcunov, (Fri Aug 20, 1:45 pm)
Re: [PATCH -v3] perf, x86: try to handle unknown nmis with ..., Don Zickus, (Tue Aug 24, 2:48 pm)