On Tuesday 18 November 2014 17:31:47 Jerome Correnoz wrote: > Jerome Correnoz <jerome.correnoz <at> st.com> writes: > > Hi, > > > > We're interested to know the CPU load/usage on our ARMv7 embedded system > > when running some use cases (e.g. simple video decode, double video > > decode, etc.). By CPU load, I mean a way to measure the time when the > > system was doing something else than Idle. > > > > I've tried to get it from the performance counter statistics but > > couldn't > > > find a way to get it, do I miss something ? > > > > Also tried to use perf for profiling the system (e.g. perf record -a). > > It > > > report very useful percentage for the running processes that we exploit > > to > > > detect hot spots. But It reports X% of the used CPU (nothing related to > > Idle or "rest of CPU"). > > > > So, any way with perf to get this information (directly or indirectly > > with > > > few calculation) ? > > > > Thanks by advance, > > > > Jerome > > Hi all, > > Can someone please help on it ?
Sadly I cannot help you, but just want to say that I'd also be interested in this data. VTune e.g. shows these fancy per-thread CPU Time graphs which are shown at the bottom of this image: https://software.intel.com/sites/default/files/managed/ef/8d/VTune-overview-fig-01.png If there'd be a way to get similar results from Linux perf, I bet it would be very useful. Bye -- Milian Wolff [email protected] http://milianw.de -- To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
