In the Power7 PMU guide:
https://www.power.org/documentation/commonly-used-metrics-for-performance-analysis/
PM_BRU_MPRED is referred to as PM_BR_MPRED.
It fixed the typo by changing the name of the event in kernel
and documentation accordingly.
This patch changes the ABI, there are some reasons I think it's ok:
- It is relatively new interface, specific to the Power7 platform.
- No tools that we know of actually use this interface at this point
(none are listed near the interface).
- Users of this interface (eg oprofile users migrating to perf)
would be more used to the "PM_BR_MPRED" rather than "PM_BRU_MPRED".
- These are in the ABI/testing at this point rather than ABI/stable,
so hoping we have some wiggle room.
Signed-off-by: Runzhen Wang <runz...@linux.vnet.ibm.com>
---
.../testing/sysfs-bus-event_source-devices-events | 2 +-
arch/powerpc/perf/power7-pmu.c | 12 ++++++------
2 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events
b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events
index 8b25ffb..3c1cc24 100644
--- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events
+++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events
@@ -29,7 +29,7 @@ Description: Generic performance monitoring events
What: /sys/devices/cpu/events/PM_1PLUS_PPC_CMPL
/sys/devices/cpu/events/PM_BRU_FIN
- /sys/devices/cpu/events/PM_BRU_MPRED
+ /sys/devices/cpu/events/PM_BR_MPRED
/sys/devices/cpu/events/PM_CMPLU_STALL
/sys/devices/cpu/events/PM_CMPLU_STALL_BRU
/sys/devices/cpu/events/PM_CMPLU_STALL_DCACHE_MISS
diff --git a/arch/powerpc/perf/power7-pmu.c b/arch/powerpc/perf/power7-pmu.c
index 13c3f0e..d1821b8 100644
--- a/arch/powerpc/perf/power7-pmu.c
+++ b/arch/powerpc/perf/power7-pmu.c
@@ -60,7 +60,7 @@
#define PME_PM_LD_REF_L1 0xc880
#define PME_PM_LD_MISS_L1 0x400f0
#define PME_PM_BRU_FIN 0x10068
-#define PME_PM_BRU_MPRED 0x400f6
+#define PME_PM_BR_MPRED 0x400f6
#define PME_PM_CMPLU_STALL_FXU 0x20014
#define PME_PM_CMPLU_STALL_DIV 0x40014
@@ -349,7 +349,7 @@ static int power7_generic_events[] = {
[PERF_COUNT_HW_CACHE_REFERENCES] = PME_PM_LD_REF_L1,
[PERF_COUNT_HW_CACHE_MISSES] = PME_PM_LD_MISS_L1,
[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = PME_PM_BRU_FIN,
- [PERF_COUNT_HW_BRANCH_MISSES] = PME_PM_BRU_MPRED,
+ [PERF_COUNT_HW_BRANCH_MISSES] = PME_PM_BR_MPRED,
};
#define C(x) PERF_COUNT_HW_CACHE_##x
@@ -405,7 +405,7 @@ GENERIC_EVENT_ATTR(instructions, INST_CMPL);
GENERIC_EVENT_ATTR(cache-references, LD_REF_L1);
GENERIC_EVENT_ATTR(cache-misses, LD_MISS_L1);
GENERIC_EVENT_ATTR(branch-instructions, BRU_FIN);
-GENERIC_EVENT_ATTR(branch-misses, BRU_MPRED);
+GENERIC_EVENT_ATTR(branch-misses, BR_MPRED);
POWER_EVENT_ATTR(CYC, CYC);
POWER_EVENT_ATTR(GCT_NOSLOT_CYC, GCT_NOSLOT_CYC);
@@ -414,7 +414,7 @@ POWER_EVENT_ATTR(INST_CMPL, INST_CMPL);
POWER_EVENT_ATTR(LD_REF_L1, LD_REF_L1);
POWER_EVENT_ATTR(LD_MISS_L1, LD_MISS_L1);
POWER_EVENT_ATTR(BRU_FIN, BRU_FIN)
-POWER_EVENT_ATTR(BRU_MPRED, BRU_MPRED);
+POWER_EVENT_ATTR(BR_MPRED, BR_MPRED);
POWER_EVENT_ATTR(CMPLU_STALL_FXU, CMPLU_STALL_FXU);
POWER_EVENT_ATTR(CMPLU_STALL_DIV, CMPLU_STALL_DIV);
@@ -449,7 +449,7 @@ static struct attribute *power7_events_attr[] = {
GENERIC_EVENT_PTR(LD_REF_L1),
GENERIC_EVENT_PTR(LD_MISS_L1),
GENERIC_EVENT_PTR(BRU_FIN),
- GENERIC_EVENT_PTR(BRU_MPRED),
+ GENERIC_EVENT_PTR(BR_MPRED),
POWER_EVENT_PTR(CYC),
POWER_EVENT_PTR(GCT_NOSLOT_CYC),
@@ -458,7 +458,7 @@ static struct attribute *power7_events_attr[] = {
POWER_EVENT_PTR(LD_REF_L1),
POWER_EVENT_PTR(LD_MISS_L1),
POWER_EVENT_PTR(BRU_FIN),
- POWER_EVENT_PTR(BRU_MPRED),
+ POWER_EVENT_PTR(BR_MPRED),
POWER_EVENT_PTR(CMPLU_STALL_FXU),
POWER_EVENT_PTR(CMPLU_STALL_DIV),
--
1.7.9.5
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