diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-event_source-devices-events')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-event_source-devices-events | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events index 505f080d20a1..0fe1b9487202 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events @@ -37,6 +37,14 @@ Description: Per-pmu performance monitoring events specific to the running syste performance monitoring event supported by the <pmu>. The name of the file is the name of the event. + As performance monitoring event names are case insensitive + in the perf tool, the perf tool only looks for all lower + case or all upper case event names in sysfs to avoid + scanning the directory. It is therefore required the + name of the event here is either completely lower or upper + case, with no mixed-case characters. Numbers, '.', '_', and + '-' are also allowed. + File contents: <term>[=<value>][,<term>[=<value>]]... @@ -47,7 +55,7 @@ Description: Per-pmu performance monitoring events specific to the running syste If a <term> is specified alone (without an assigned value), it is implied that 0x1 is assigned to that <term>. - Examples (each of these lines would be in a seperate file): + Examples (each of these lines would be in a separate file): event=0x2abc event=0x423,inv,cmask=0x3 @@ -83,7 +91,7 @@ Description: Perf event scaling factors A string representing a floating point value expressed in scientific notation to be multiplied by the event count - recieved from the kernel to match the unit specified in the + received from the kernel to match the unit specified in the <event>.unit file. Example: |