perfcounters: add task migrations counter
Impact: add new feature, new sw counter
Add a counter that counts the number of cross-CPU migrations a
task is suffering.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index d2a1656..f30486f 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -42,6 +42,8 @@
PERF_COUNT_BRANCH_INSTRUCTIONS = 4,
PERF_COUNT_BRANCH_MISSES = 5,
+ PERF_HW_EVENTS_MAX = 6,
+
/*
* Special "software" counters provided by the kernel, even if
* the hardware does not support performance counters. These
@@ -50,11 +52,11 @@
*/
PERF_COUNT_CPU_CLOCK = -1,
PERF_COUNT_TASK_CLOCK = -2,
- /*
- * Future software events:
- */
PERF_COUNT_PAGE_FAULTS = -3,
PERF_COUNT_CONTEXT_SWITCHES = -4,
+ PERF_COUNT_CPU_MIGRATIONS = -5,
+
+ PERF_SW_EVENTS_MIN = -6,
};
/*