Manuel Selva <selva.man...@gmail.com> writes:
> The perf mem record tool use the > MEM_INST_RETIRED.LATENCY_ABOVE_THRESHOLD which I guess belongs to the > memory PEBS events you mentionned (isn't it ?) is reporting Yes. > information about the sources of the events. it seems that for this > purpose the IP information is used, does it mean that what perf mem > reports can be wrong because of the random IP selection mechanism you > mentionned ? The CPU can theoretically execute billions of loads/stores every second. There is no way any reporting mechanism can keep up with that. So the only thing you can do is to sample (only collect every N operations), with a fairly large period. -Andi -- a...@linux.intel.com -- Speaking for myself only -- 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
