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.