Re: [PATCH] ARC: perf: ARC 700 PMU doesn't support sampling events

2013-11-13 Thread Peter Zijlstra
On Wed, Nov 13, 2013 at 04:06:06PM +0100, Mischa Jonker wrote: > The ARC 700 does not have an interrupt associated with it, and as > such it cannot trigger when a counter overflows. As the counters are > 48 bit, it will usually take at least 100 days before a counter > overflows, so for mere counti

[PATCH] ARC: perf: ARC 700 PMU doesn't support sampling events

2013-11-13 Thread Mischa Jonker
The ARC 700 does not have an interrupt associated with it, and as such it cannot trigger when a counter overflows. As the counters are 48 bit, it will usually take at least 100 days before a counter overflows, so for mere counting of events, there is no problem. Sampling is not supported though. C