diff options
Diffstat (limited to 'Documentation/admin-guide/perf/hisi-pmu.rst')
| -rw-r--r-- | Documentation/admin-guide/perf/hisi-pmu.rst | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/admin-guide/perf/hisi-pmu.rst b/Documentation/admin-guide/perf/hisi-pmu.rst index e0174d20809a..48992a0b8e94 100644 --- a/Documentation/admin-guide/perf/hisi-pmu.rst +++ b/Documentation/admin-guide/perf/hisi-pmu.rst @@ -20,7 +20,6 @@ interrupt, and the PMU driver shall register perf PMU drivers like L3C, HHA and DDRC etc. The available events and configuration options shall be described in the sysfs, see: -/sys/devices/hisi_sccl{X}_<l3c{Y}/hha{Y}/ddrc{Y}>/, or /sys/bus/event_source/devices/hisi_sccl{X}_<l3c{Y}/hha{Y}/ddrc{Y}>. The "perf list" command shall list the available events from sysfs. @@ -36,7 +35,10 @@ e.g. hisi_sccl1_hha0/rx_operations is RX_OPERATIONS event of HHA index #0 in SCCL ID #1. The driver also provides a "cpumask" sysfs attribute, which shows the CPU core -ID used to count the uncore PMU event. +ID used to count the uncore PMU event. An "associated_cpus" sysfs attribute is +also provided to show the CPUs associated with this PMU. The "cpumask" indicates +the CPUs to open the events, usually as a hint for userspaces tools like perf. +It only contains one associated CPU from the "associated_cpus". Example usage of perf:: |