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+What:           /sys/devices/cpu/events/
+                /sys/devices/cpu/events/branch-misses
+                /sys/devices/cpu/events/cache-references
+                /sys/devices/cpu/events/cache-misses
+                /sys/devices/cpu/events/stalled-cycles-frontend
+                /sys/devices/cpu/events/branch-instructions
+                /sys/devices/cpu/events/stalled-cycles-backend
+                /sys/devices/cpu/events/instructions
+                /sys/devices/cpu/events/cpu-cycles
+
+Date:           2013/01/08
+
+Contact:        Linux kernel mailing list <linux-kernel@vger.kernel.org>
+
+Description:    Generic performance monitoring events
+
+                A collection of performance monitoring events that may be
+                supported by many/most CPUs. These events can be monitored
+                using the 'perf(1)' tool.
+
+                The contents of each file would look like:
+
+                        event=0xNNNN
+
+                where 'N' is a hex digit and the number '0xNNNN' shows the
+                "raw code" for the perf event identified by the file's
+                "basename".
+
+
+What:           /sys/devices/cpu/events/PM_LD_MISS_L1
+                /sys/devices/cpu/events/PM_LD_REF_L1
+                /sys/devices/cpu/events/PM_CYC
+                /sys/devices/cpu/events/PM_BRU_FIN
+                /sys/devices/cpu/events/PM_GCT_NOSLOT_CYC
+                /sys/devices/cpu/events/PM_BRU_MPRED
+                /sys/devices/cpu/events/PM_INST_CMPL
+                /sys/devices/cpu/events/PM_CMPLU_STALL
+
+Date:           2013/01/08
+
+Contact:        Linux kernel mailing list <linux-kernel@vger.kernel.org>
+                Linux Powerpc mailing list <linuxppc-dev@ozlabs.org>
+
+Description:    POWER-systems specific performance monitoring events
+
+                A collection of performance monitoring events that may be
+                supported by the POWER CPU. These events can be monitored
+                using the 'perf(1)' tool.
+
+                These events may not be supported by other CPUs.
+
+                The contents of each file would look like:
+
+                        event=0xNNNN
+
+                where 'N' is a hex digit and the number '0xNNNN' shows the
+                "raw code" for the perf event identified by the file's
+                "basename".
+
+                Further, multiple terms like 'event=0xNNNN' can be specified
+                and separated with comma. All available terms are defined in
+                the /sys/bus/event_source/devices/<dev>/format file.