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Subject[PATCH V5 0/13] perf: Intel uncore pmu counting support
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Hi, all

Here is the V5 patches to add uncore counting support for Nehalem,
Sandy Bridge and Sandy Bridge-EP, applied on top of current tip.
The code is based on Lin Ming's old patches.

For Nehalem and Sandy Bridge-EP, A few general events are exported
under sysfs directory:
/sys/bus/event_source/devices/${uncore_dev}/events/
Each file in the events directory defines an event. The content is
a string such as:
config=1,config1=2

You can use 'perf stat' to access to the uncore pmu. For example:
perf stat -a -C 0 -e 'Uncore_iMC_0/CAS_COUNT_RD/' sleep 1
perf stat -a -C 0 -e 'Uncore_iMC_0/event=CAS_COUNT_RD/' sleep 1

Any comment is appreciated.
Thank you
---
Changes since v1:
- Modify perf tool to parse events from sysfs
- A few minor code cleanup
Changes since v2:
- Place all events for a particular socket onto a single cpu
- Make the events parser in perf tool reentrantable
- A few code cleanup

Changes since v3:
- Use per cpu pointer to track uncore box
- Rework the cpu hotplug code because topology_physical_package_id()
return wrong result when the cpu is offline
- Rework the event alias code, event terms are stored in the alias
structure instead events string

Changes since v4:
- Include Jiri's uncore related changes patch set
- Add pmu/event=alias/ syntax support



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