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Date: Sat, 08 Mar 2014 08:51:18 +0100 From: Mike Galbraith <umgwanakikbuti@...il.com> To: Andy Lutomirski <luto@...capital.net> Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: perf samples too long without perf running (?!?) On Fri, 2014-03-07 at 17:57 -0800, Andy Lutomirski wrote: > On recent (3.13) kernels, I'm frequently getting messages like: > > perf samples too long (2503 > 2500), lowering > kernel.perf_event_max_sample_rate to 50000 > > a few seconds to minutes after bootup. As far as I know, I'm not > using perf. What's going on here? 14c63f17b1 I get those all the time too, just building kernels. [ 598.583918] perf samples too long (2539 > 2500), lowering kernel.perf_event_max_sample_rate to 50000 Darn nmi_watchdog is an expensive employee. Scarier are the ones from 2ab00456ea when using perf. Firing the dog makes it all batter. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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