On Wed, Nov 06, 2013 at 01:33:23PM +0000, Amit Tomer wrote: > We recently installed Perf tool on our platform based on Cortex A-15 cores > and Linux kerenl 3.4.8. > > We enabled the Hardware Performance counter(PMU) and can see below message in > dmeg log . > > [ 2.292157] hw perfevents: enabled with ARMv7 Cortex-A15 PMU driver, 7 > counters available > > This message suggests there are 7 counter avaiable here. > > But when we run the below command ,we find two counters named > stalled-cycles-frontend and stalled-cycles-backend are not suported
Take a look at the Cortex-A15 TRM. I couldn't see anything in there which matched my understanding of stalled-cycles-frontend or stalled-cycles-backend, so I decided to leave them as UNSUPPORTED. Do you have a suggestion for which event to use? Will -- 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
