On Tue, Jul 08, 2014 at 11:42:42AM -0300, Martin Ichilevici de Oliveira wrote: > Hello, > > I'm learning the perf_events programming interface and I'm not sure if > what I'm trying to do is possible. I could only find the perf_event_open > documentation, but unfortunately that's not enough for my needs, as it > only counts the number of events that happened. > > I'm looking for a way to determine which instruction caused some events: > something similar to what perf annotate does, but in an online fashion. > Ideally, I'd like to have some kind of handler that gets called whenever > a perf event occurs. Is that even possible? If not, is there any way I > could get this information in a real-time way?
hi, you could use perf_event_create_kernel_counter interface, check the lockup watchdog in kernel/watchdog.c jirka -- To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
