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Diffstat (limited to 'Documentation/perf/arm_dsu_pmu.txt')
| -rw-r--r-- | Documentation/perf/arm_dsu_pmu.txt | 28 |
1 files changed, 0 insertions, 28 deletions
diff --git a/Documentation/perf/arm_dsu_pmu.txt b/Documentation/perf/arm_dsu_pmu.txt deleted file mode 100644 index d611e15f5add..000000000000 --- a/Documentation/perf/arm_dsu_pmu.txt +++ /dev/null @@ -1,28 +0,0 @@ -ARM DynamIQ Shared Unit (DSU) PMU -================================== - -ARM DynamIQ Shared Unit integrates one or more cores with an L3 memory system, -control logic and external interfaces to form a multicore cluster. The PMU -allows counting the various events related to the L3 cache, Snoop Control Unit -etc, using 32bit independent counters. It also provides a 64bit cycle counter. - -The PMU can only be accessed via CPU system registers and are common to the -cores connected to the same DSU. Like most of the other uncore PMUs, DSU -PMU doesn't support process specific events and cannot be used in sampling mode. - -The DSU provides a bitmap for a subset of implemented events via hardware -registers. There is no way for the driver to determine if the other events -are available or not. Hence the driver exposes only those events advertised -by the DSU, in "events" directory under : - - /sys/bus/event_sources/devices/arm_dsu_<N>/ - -The user should refer to the TRM of the product to figure out the supported events -and use the raw event code for the unlisted events. - -The driver also exposes the CPUs connected to the DSU instance in "associated_cpus". - - -e.g usage : - - perf stat -a -e arm_dsu_0/cycles/ |