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