1 What: /sys/bus/event_source/devices/<pmu>
4 Description: Performance Monitoring Unit (<pmu>)
6 Each <pmu> directory, for a PMU device, is a name
7 optionally followed by an underscore and then either a
8 decimal or hexadecimal number. For example, cpu is a
9 PMU name without a suffix as is intel_bts,
10 uncore_imc_0 is a PMU name with a 0 numeric suffix,
11 ddr_pmu_87e1b0000000 is a PMU name with a hex
12 suffix. The hex suffix must be more than two
13 characters long to avoid ambiguity with PMUs like the
16 Tools can treat PMUs with the same name that differ by
17 suffix as instances of the same PMU for the sake of,
18 for example, opening an event. For example, the PMUs
19 uncore_imc_free_running_0 and
20 uncore_imc_free_running_1 have an event data_read;
21 opening the data_read event on a PMU specified as
22 uncore_imc_free_running should be treated as opening
23 the data_read event on PMU uncore_imc_free_running_0
24 and PMU uncore_imc_free_running_1.