From: Dapeng Mi <dapeng1.mi@linux.intel.com>
To: Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Zhenyu Wang <zhenyuw@linux.intel.com>,
Zhang Xiong <xiong.y.zhang@intel.com>,
Jim Mattson <jmattson@google.com>,
Mingwei Zhang <mizhang@google.com>,
Like Xu <like.xu.linux@gmail.com>,
Dapeng Mi <dapeng1.mi@intel.com>,
Dapeng Mi <dapeng1.mi@linux.intel.com>
Subject: [kvm-unit-tests Patch 2/5] x86: pmu: Change the minimum value of llc_misses event to 0
Date: Tue, 24 Oct 2023 15:57:45 +0800 [thread overview]
Message-ID: <20231024075748.1675382-3-dapeng1.mi@linux.intel.com> (raw)
In-Reply-To: <20231024075748.1675382-1-dapeng1.mi@linux.intel.com>
Along with the CPU HW's upgrade and optimization, the count of LLC
misses event for running loop() helper could be 0 just like seen on
Sapphire Rapids.
So modify the lower limit of possible count range for LLC misses
events to 0 to avoid LLC misses event test failure on Sapphire Rapids.
Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
---
x86/pmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/x86/pmu.c b/x86/pmu.c
index 0def28695c70..7443fdab5c8a 100644
--- a/x86/pmu.c
+++ b/x86/pmu.c
@@ -35,7 +35,7 @@ struct pmu_event {
{"instructions", 0x00c0, 10*N, 10.2*N},
{"ref cycles", 0x013c, 1*N, 30*N},
{"llc references", 0x4f2e, 1, 2*N},
- {"llc misses", 0x412e, 1, 1*N},
+ {"llc misses", 0x412e, 0, 1*N},
{"branches", 0x00c4, 1*N, 1.1*N},
{"branch misses", 0x00c5, 0, 0.1*N},
}, amd_gp_events[] = {
--
2.34.1
next prev parent reply other threads:[~2023-10-24 7:51 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-24 7:57 [kvm-unit-tests Patch 0/5] Fix PMU test failures on Sapphire Rapids Dapeng Mi
2023-10-24 7:57 ` [kvm-unit-tests Patch 1/5] x86: pmu: Remove duplicate code in pmu_init() Dapeng Mi
2023-10-24 7:57 ` Dapeng Mi [this message]
2023-10-24 13:03 ` [kvm-unit-tests Patch 2/5] x86: pmu: Change the minimum value of llc_misses event to 0 Jim Mattson
2023-10-25 11:22 ` Mi, Dapeng
2023-10-25 12:35 ` Jim Mattson
2023-10-26 2:14 ` Mi, Dapeng
2023-10-26 12:19 ` Jim Mattson
2023-10-27 10:17 ` Mi, Dapeng
2023-10-24 7:57 ` [kvm-unit-tests Patch 3/5] x86: pmu: Enlarge cnt array length to 64 in check_counters_many() Dapeng Mi
2023-10-24 7:57 ` [kvm-unit-tests Patch 4/5] x86: pmu: Support validation for Intel PMU fixed counter 3 Dapeng Mi
2023-10-24 19:05 ` Jim Mattson
2023-10-25 11:26 ` Mi, Dapeng
2023-10-25 12:38 ` Jim Mattson
2023-10-26 2:29 ` Mi, Dapeng
2023-10-24 7:57 ` [kvm-unit-tests Patch 5/5] x86: pmu: Add asserts to warn inconsistent fixed events and counters Dapeng Mi
2023-10-25 23:47 ` [kvm-unit-tests Patch 0/5] Fix PMU test failures on Sapphire Rapids Mingwei Zhang
2023-10-26 3:32 ` Mi, Dapeng
2023-10-30 3:57 ` Mingwei Zhang
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