Hello all, I measured load latency using perf mem rec and I have some doubts regarding the results. It is a 2 socket machine, with 2x Intel E5-2620 (2x 6 cores) at 2.3 GHz. I sampled the application which runs on all 12 cores for half an hour. When I print out the results with perf mem rep I get a very broad range of latencies for certain events. Specifically, Local RAM hits have latencies from ~20 cycles up to ~2000 cycles. It is similar for Remote RAM hits (which happen rarely). First, I used 200 samples/second, but it is the same when I use 50 samples/second.
Is there some useful advice how could I filter these results? I guess RAM hits should not have latencies bellow ~200 cycles. Thanks for your help, Milan -- 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
