linux-kernel - [kvm-unit-tests patch v2 5/7] x86/pmu: Expand "llc references" upper limit for broader compatibility

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Message-Id: <20250718013915.227452-6-dapeng1.mi@linux.intel.com>
Date: Fri, 18 Jul 2025 09:39:13 +0800
From: Dapeng Mi <dapeng1.mi@...ux.intel.com>
To: Sean Christopherson <seanjc@...gle.com>,
	Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Jim Mattson <jmattson@...gle.com>,
	Mingwei Zhang <mizhang@...gle.com>,
	Zide Chen <zide.chen@...el.com>,
	Das Sandipan <Sandipan.Das@....com>,
	Shukla Manali <Manali.Shukla@....com>,
	Yi Lai <yi1.lai@...el.com>,
	Xiaoyao Li <xiaoyao.li@...el.com>,
	Dapeng Mi <dapeng1.mi@...el.com>,
	dongsheng <dongsheng.x.zhang@...el.com>,
	Dapeng Mi <dapeng1.mi@...ux.intel.com>
Subject: [kvm-unit-tests patch v2 5/7] x86/pmu: Expand "llc references" upper limit for broader compatibility

From: dongsheng <dongsheng.x.zhang@...el.com>

Increase the upper limit of the "llc references" test to accommodate
results observed on additional Intel CPU models, including CWF and
SRF.
These CPUs exhibited higher reference counts that previously caused
the test to fail.

Signed-off-by: dongsheng <dongsheng.x.zhang@...el.com>
Signed-off-by: Dapeng Mi <dapeng1.mi@...ux.intel.com>
Tested-by: Yi Lai <yi1.lai@...el.com>
---
 x86/pmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/x86/pmu.c b/x86/pmu.c
index c54c0988..445ea6b4 100644
--- a/x86/pmu.c
+++ b/x86/pmu.c
@@ -116,7 +116,7 @@ struct pmu_event {
 	{"core cycles", 0x003c, 1*N, 50*N},
 	{"instructions", 0x00c0, 10*N, 10.2*N},
 	{"ref cycles", 0x013c, 1*N, 30*N},
-	{"llc references", 0x4f2e, 1, 2*N},
+	{"llc references", 0x4f2e, 1, 2.5*N},
 	{"llc misses", 0x412e, 1, 1*N},
 	{"branches", 0x00c4, 1*N, 1.1*N},
 	{"branch misses", 0x00c5, 1, 0.1*N},
-- 
2.34.1