On 2/22/2023 2:28 PM, Dave Hansen wrote: > On 2/22/23 14:07, Joseph, Jithu wrote: >> Since the trace has to be explicitly enabled (I thought it is okay to >> add a more convenient custom one only to be enabled for detailed >> analysis when required). > > man perf-script > > You should be able to write one to do exactly what you need in about 10 > minutes. No new tracepoints, no new kernel code to maintain. Knock Thanks for the pointers. I gather that user level tools might be able to format the msr trace output in a more convenient way (perhaps as generated by the custom driver trace) There is still the other convenience of not having to look-up the MSRs addresses corresponding to all the individual tests and setting the filter on them to analyze IFS test activity (rather than enabling it via echo 1 > /sys/kernel/debug/tracing/events/intel_ifs/enable) Agreed that for array test it is a single MSR. For other test, it is 2 separate MSRs ... there could be additional tests in the future. Jithu
