diff mbox series

[kvm-unit-tests,v3,6/6] arm: pmu-chain-promotion: Increase the count and margin values

Message ID 20230619200401.1963751-7-eric.auger@redhat.com (mailing list archive)
State New, archived
Headers show
Series arm: pmu: Fix random failures of pmu-chain-promotion | expand

Commit Message

Eric Auger June 19, 2023, 8:04 p.m. UTC 
Let's increase the mem_access loop count by defining COUNT=250
(instead of 20) and define a more reasonable margin (100 instead
of 15 previously) so that it gives better chance to accommodate
for HW implementation variance. Those values were chosen arbitrarily
higher. Those values fix the random failures on ThunderX2 machines.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
---
 arm/pmu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/arm/pmu.c b/arm/pmu.c
index 491d2958..63822d19 100644
--- a/arm/pmu.c
+++ b/arm/pmu.c
@@ -64,8 +64,8 @@ 
 #define ALL_CLEAR		0x0000000000000000ULL
 #define PRE_OVERFLOW_32		0x00000000FFFFFFF0ULL
 #define PRE_OVERFLOW_64		0xFFFFFFFFFFFFFFF0ULL
-#define COUNT 20
-#define MARGIN 15
+#define COUNT 250
+#define MARGIN 100
 /*
  * PRE_OVERFLOW2 is set so that 1st @COUNT iterations do not
  * produce 32b overflow and 2nd @COUNT iterations do. To accommodate