Re: [PATCH v2 0/6] perf arm64 metricgroup support
From: John Garry <hidden>
Date: 2021-03-26 11:01:05
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On 25/03/2021 20:39, Paul A. Clarke wrote:
On Thu, Mar 25, 2021 at 06:33:12PM +0800, John Garry wrote:quoted
Metric reuse support is added for pmu-events parse metric testcase. This had been broken on power9 recentlty: https://lore.kernel.org/lkml/20210324015418.GC8931@li-24c3614c-2adc-11b2-a85c-85f334518bdb.ibm.com/ (local)Much better. Before: -- $ perf test -v 10 2>&1 | grep -i error | wc -l 112 -- After: -- $ perf test -v 10 2>&1 | grep -i error | wc -l 17 -- And these seem like different types of issues: -- $ perf test -v 10 2>&1 | grep -i error Error string 'Cannot find PMU `nest_mcs01_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs01_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs23_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs23_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs01_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs01_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs23_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs23_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_powerbus0_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs23_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs01_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs01_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs01_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs01_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs23_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs23_imc'. Missing kernel support?' help '(null)' Error string 'Cannot find PMU `nest_mcs23_imc'. Missing kernel support?' help '(null)' --
This looks suspicious. Firstly, does /sys/bus/event_source/devices/nest_mcs01_imc (or others, above) exist on your system? I guess not. Secondly, checking Documentation/powerpc/imc.rst, we have examples of: nest_mcs01/PM_MCS01_64B_R... So is the PMU name correct in the metric file for nest_mcs01_imc? Looking at the kernel driver file, arch/powerpc/perf/imc-pmu.c, it seems to be correct. Not sure. Thanks, John
(Added Kajol Jain to CC)
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