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lastdragon
2026-09-06 12:53:21 -06:00
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linux-7.2.3/Documentation/ABI/testing/sysfs-bus-event_source-devices-format
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What: /sys/bus/event_source/devices/<dev>/format
Date: January 2012
KernelVersion: 3.3
Contact: Jiri Olsa <jolsa@redhat.com>
Description:
Attribute group to describe the magic bits that go into
perf_event_attr::config[012] for a particular pmu.
Each attribute of this group defines the 'hardware' bitmask
we want to export, so that userspace can deal with sane
name/value pairs.
Userspace must be prepared for the possibility that attributes
define overlapping bit ranges. For example::
attr1 = 'config:0-23'
attr2 = 'config:0-7'
attr3 = 'config:12-35'
Example: 'config1:1,6-10,44'
Defines contents of attribute that occupies bits 1,6-10,44 of
perf_event_attr::config1.