By using count_pmc() to reset the pmc instead of write_pmc(), an extra
count is performed on ebb_state.stats.pmc_count[PMC_INDEX(pmc)] more than
the value accounted by ebb_state.stats.ebb_count in the main test loops.
This extra pmc_count makes a few tests fail occasionally on PowerVM systems
with high workloads, such as cycles_test shown hereafter, where the
ebb_count is occasionally above the upper limit due to this extra count.
Moreover, this is also indicated by extra PMC1 trace_log on the output of
a few tests:
==========
...
[21]: counter = 8
[22]: register SPRN_MMCR0 = 0x0000000080000080
[23]: register SPRN_PMC1 = 0x0000000080000004
[24]: counter = 9
[25]: register SPRN_MMCR0 = 0x0000000080000080
[26]: register SPRN_PMC1 = 0x0000000080000004
[27]: counter = 10
[28]: register SPRN_MMCR0 = 0x0000000080000080
[29]: register SPRN_PMC1 = 0x0000000080000004
>> [30]: register SPRN_PMC1 = 0x000000004000051e
PMC1 count (0x280000546) above upper limit 0x2800003e8 (+0x15e)
[FAIL] Test FAILED on line 52
failure: cycles
==========
Signed-off-by: Desnes A. Nunes do Rosario <desn...@linux.ibm.com>
---
.../powerpc/pmu/ebb/back_to_back_ebbs_test.c | 2 +-
.../testing/selftests/powerpc/pmu/ebb/cycles_test.c | 2 +-
.../powerpc/pmu/ebb/cycles_with_freeze_test.c | 2 +-
.../powerpc/pmu/ebb/cycles_with_mmcr2_test.c | 2 +-
tools/testing/selftests/powerpc/pmu/ebb/ebb.c | 2 +-
.../powerpc/pmu/ebb/ebb_on_willing_child_test.c | 2 +-
.../selftests/powerpc/pmu/ebb/lost_exception_test.c | 2 +-
.../selftests/powerpc/pmu/ebb/multi_counter_test.c | 12 ++++++------
.../selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c | 2 +-
.../selftests/powerpc/pmu/ebb/pmae_handling_test.c | 2 +-
.../selftests/powerpc/pmu/ebb/pmc56_overflow_test.c | 2 +-
11 files changed, 16 insertions(+), 16 deletions(-)
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c
b/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c
index a2d7b0e3dca9..f133ab425f10 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c
@@ -91,7 +91,7 @@ int back_to_back_ebbs(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
+ write_pmc(1, pmc_sample_period(sample_period));
dump_ebb_state();
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c
b/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c
index bc893813483e..14a399a64729 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c
@@ -42,7 +42,7 @@ int cycles(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
+ write_pmc(1, pmc_sample_period(sample_period));
dump_ebb_state();
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c
b/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c
index dcd351d20328..0f2089f6f82c 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c
@@ -99,7 +99,7 @@ int cycles_with_freeze(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
+ write_pmc(1, pmc_sample_period(sample_period));
dump_ebb_state();
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c
b/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c
index 94c99c12c0f2..a8f3bee04cd8 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c
@@ -71,7 +71,7 @@ int cycles_with_mmcr2(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
+ write_pmc(1, pmc_sample_period(sample_period));
dump_ebb_state();
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
b/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
index dfbc5c3ad52d..bf6f25dfcf7b 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
@@ -396,7 +396,7 @@ int ebb_child(union pipe read_pipe, union pipe write_pipe)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
+ write_pmc(1, pmc_sample_period(sample_period));
dump_ebb_state();
diff --git
a/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c
b/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c
index ca2f7d729155..513812cdcca1 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c
@@ -38,7 +38,7 @@ static int victim_child(union pipe read_pipe, union pipe
write_pipe)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
+ write_pmc(1, pmc_sample_period(sample_period));
dump_ebb_state();
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c
b/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c
index ac3e6e182614..5979606c41dc 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c
@@ -75,7 +75,7 @@ static int test_body(void)
ebb_freeze_pmcs();
ebb_global_disable();
- count_pmc(4, sample_period);
+ write_pmc(4, pmc_sample_period(sample_period));
mtspr(SPRN_PMC4, 0xdead);
dump_summary_ebb_state();
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c
b/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c
index b8242e9d97d2..227827b665d5 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c
@@ -70,12 +70,12 @@ int multi_counter(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
- count_pmc(2, sample_period);
- count_pmc(3, sample_period);
- count_pmc(4, sample_period);
- count_pmc(5, sample_period);
- count_pmc(6, sample_period);
+ write_pmc(1, pmc_sample_period(sample_period));
+ write_pmc(2, pmc_sample_period(sample_period));
+ write_pmc(3, pmc_sample_period(sample_period));
+ write_pmc(4, pmc_sample_period(sample_period));
+ write_pmc(5, pmc_sample_period(sample_period));
+ write_pmc(6, pmc_sample_period(sample_period));
dump_ebb_state();
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c
b/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c
index a05c0e18ded6..ade70bed0499 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c
@@ -61,7 +61,7 @@ static int cycles_child(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
+ write_pmc(1, pmc_sample_period(sample_period));
dump_summary_ebb_state();
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c
b/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c
index 153ebc92234f..7b4bf4ed12cb 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c
@@ -82,7 +82,7 @@ static int test_body(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
+ write_pmc(1, pmc_sample_period(sample_period));
dump_ebb_state();
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c
b/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c
index eadad75ed7e6..bb55af71404d 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c
@@ -76,7 +76,7 @@ int pmc56_overflow(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(2, sample_period);
+ write_pmc(2, pmc_sample_period(sample_period));
dump_ebb_state();
--
2.21.0
