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Diffstat (limited to 'Documentation/perf/qcom_l2_pmu.txt')
| -rw-r--r-- | Documentation/perf/qcom_l2_pmu.txt | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/Documentation/perf/qcom_l2_pmu.txt b/Documentation/perf/qcom_l2_pmu.txt deleted file mode 100644 index b25b97659ab9..000000000000 --- a/Documentation/perf/qcom_l2_pmu.txt +++ /dev/null @@ -1,38 +0,0 @@ -Qualcomm Technologies Level-2 Cache Performance Monitoring Unit (PMU) -===================================================================== - -This driver supports the L2 cache clusters found in Qualcomm Technologies -Centriq SoCs. There are multiple physical L2 cache clusters, each with their -own PMU. Each cluster has one or more CPUs associated with it. - -There is one logical L2 PMU exposed, which aggregates the results from -the physical PMUs. - -The driver provides a description of its available events and configuration -options in sysfs, see /sys/devices/l2cache_0. - -The "format" directory describes the format of the events. - -Events can be envisioned as a 2-dimensional array. Each column represents -a group of events. There are 8 groups. Only one entry from each -group can be in use at a time. If multiple events from the same group -are specified, the conflicting events cannot be counted at the same time. - -Events are specified as 0xCCG, where CC is 2 hex digits specifying -the code (array row) and G specifies the group (column) 0-7. - -In addition there is a cycle counter event specified by the value 0xFE -which is outside the above scheme. - -The driver provides a "cpumask" sysfs attribute which contains a mask -consisting of one CPU per cluster which will be used to handle all the PMU -events on that cluster. - -Examples for use with perf: - - perf stat -e l2cache_0/config=0x001/,l2cache_0/config=0x042/ -a sleep 1 - - perf stat -e l2cache_0/config=0xfe/ -C 2 sleep 1 - -The driver does not support sampling, therefore "perf record" will -not work. Per-task perf sessions are not supported. |