[RFC][PATCH v1 00/15] perf: export events in a structured way via sysfs

[RFC][PATCH v1 00/15] perf: export events in a structured way via sysfs

[Lin Ming]

Hi, all

(CC driver maintainers since many device tracepoint events are exported)

This patch series is based on the discussion of
[rfc] Describe events in a structured way via sysfs
http://lkml.org/lkml/2010/5/21/102

Applied on top of Peter's perf tree, perf-pmu branch.

Hareware/Software/Tracepoint events are exported in a structured way via
sysfs, like below
I throw out these patches to see if various events are put under correct
sysfs point.

Robert Richter and Corey Ashford have some ideas about what event
attributes should be shown in sysfs, but now let's just show "config"
and "type" for demo of sysfs structure.

And I'll document the sysfs ABI in later version.

1. Hardware events
/sys/devices/system/cpu/cpu0...cpuN/events
|-- L1-dcache-load-misses  ===> event name
|   |-- config             ===> config value for the event
|   `-- type               ===> event type
|-- cycles
|   |-- config
|   `-- type
.....

2. Software events
/sys/kernel/events
|-- page-faults
|   |-- config
|   `-- type
|-- context-switches
|   |-- config
|   `-- type
....

3. Tracepoint events
/sys/devices/pci0000:00/0000:00:02.0/events
|-- i915_gem_object_create
|   |-- config
|   `-- type
|-- i915_gem_object_bind
|   |-- config
|   `-- type
....
/sys/devices/system/kvm/kvm0/events
|-- kvm_entry
|   |-- config
|   `-- type
|-- kvm_hypercall
|   |-- config
|   `-- type
....

Welcome for any comment.

Thanks,
Lin Ming