From: Dapeng Mi <dapeng1.mi@linux.intel.com>
To: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Kan Liang <kan.liang@linux.intel.com>,
Andi Kleen <ak@linux.intel.com>,
Eranian Stephane <eranian@google.com>
Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Dapeng Mi <dapeng1.mi@intel.com>,
Dapeng Mi <dapeng1.mi@linux.intel.com>
Subject: [Patch v3 7/7] perf/x86: Print PMU counters bitmap in x86_pmu_show_pmu_cap()
Date: Wed, 20 Aug 2025 10:30:32 +0800 [thread overview]
Message-ID: <20250820023032.17128-8-dapeng1.mi@linux.intel.com> (raw)
In-Reply-To: <20250820023032.17128-1-dapeng1.mi@linux.intel.com>
Along with the introduction Perfmon v6, pmu counters could be
incontinuous, like fixed counters on CWF, only fixed counters 0-3 and
5-7 are supported, there is no fixed counter 4 on CWF. To accommodate
this change, archPerfmonExt CPUID (0x23) leaves are introduced to
enumerate the true-view of counters bitmap.
Current perf code already supports archPerfmonExt CPUID and uses
counters-bitmap to enumerate HW really supported counters, but
x86_pmu_show_pmu_cap() still only dumps the absolute counter number
instead of true-view bitmap, it's out-dated and may mislead readers.
So dump counters true-view bitmap in x86_pmu_show_pmu_cap() and
opportunistically change the dump sequence and words.
Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
---
arch/x86/events/core.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 7610f26dfbd9..745caa6c15a3 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2069,13 +2069,15 @@ static void _x86_pmu_read(struct perf_event *event)
void x86_pmu_show_pmu_cap(struct pmu *pmu)
{
- pr_info("... version: %d\n", x86_pmu.version);
- pr_info("... bit width: %d\n", x86_pmu.cntval_bits);
- pr_info("... generic registers: %d\n", x86_pmu_num_counters(pmu));
- pr_info("... value mask: %016Lx\n", x86_pmu.cntval_mask);
- pr_info("... max period: %016Lx\n", x86_pmu.max_period);
- pr_info("... fixed-purpose events: %d\n", x86_pmu_num_counters_fixed(pmu));
- pr_info("... event mask: %016Lx\n", hybrid(pmu, intel_ctrl));
+ pr_info("... version: %d\n", x86_pmu.version);
+ pr_info("... bit width: %d\n", x86_pmu.cntval_bits);
+ pr_info("... generic counters: %d\n", x86_pmu_num_counters(pmu));
+ pr_info("... generic bitmap: %016llx\n", hybrid(pmu, cntr_mask64));
+ pr_info("... fixed-purpose counters: %d\n", x86_pmu_num_counters_fixed(pmu));
+ pr_info("... fixed-purpose bitmap: %016llx\n", hybrid(pmu, fixed_cntr_mask64));
+ pr_info("... value mask: %016llx\n", x86_pmu.cntval_mask);
+ pr_info("... max period: %016llx\n", x86_pmu.max_period);
+ pr_info("... global_ctrl mask: %016llx\n", hybrid(pmu, intel_ctrl));
}
static int __init init_hw_perf_events(void)
--
2.34.1
next prev parent reply other threads:[~2025-08-20 2:31 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-20 2:30 [Patch v3 0/7] x86 perf bug fixes and optimization Dapeng Mi
2025-08-20 2:30 ` [Patch v3 1/7] perf/x86/intel: Use early_initcall() to hook bts_init() Dapeng Mi
2025-08-25 10:24 ` [tip: perf/core] " tip-bot2 for Dapeng Mi
2025-08-20 2:30 ` [Patch v3 2/7] perf/x86/intel: Fix IA32_PMC_x_CFG_B MSRs access error Dapeng Mi
2025-08-25 10:24 ` [tip: perf/core] " tip-bot2 for Dapeng Mi
2025-08-20 2:30 ` [Patch v3 3/7] perf/x86: Check if cpuc->events[*] pointer exists before accessing it Dapeng Mi
2025-08-20 3:41 ` Andi Kleen
2025-08-20 5:33 ` Mi, Dapeng
2025-08-20 5:44 ` Andi Kleen
2025-08-20 5:54 ` Mi, Dapeng
2025-08-21 1:51 ` Andi Kleen
2025-08-21 13:35 ` Peter Zijlstra
2025-08-22 5:26 ` Mi, Dapeng
2025-08-26 3:47 ` Mi, Dapeng
2025-08-20 2:30 ` [Patch v3 4/7] perf/x86: Add PERF_CAP_PEBS_TIMING_INFO flag Dapeng Mi
2025-08-25 10:24 ` [tip: perf/core] " tip-bot2 for Dapeng Mi
2025-08-20 2:30 ` [Patch v3 5/7] perf/x86/intel: Change macro GLOBAL_CTRL_EN_PERF_METRICS to BIT_ULL(48) Dapeng Mi
2025-08-25 10:24 ` [tip: perf/core] " tip-bot2 for Dapeng Mi
2025-10-02 16:19 ` [Patch v3 5/7] " ChaosEsque Team
2025-08-20 2:30 ` [Patch v3 6/7] perf/x86/intel: Add ICL_FIXED_0_ADAPTIVE bit into INTEL_FIXED_BITS_MASK Dapeng Mi
2025-08-25 10:24 ` [tip: perf/core] " tip-bot2 for Dapeng Mi
2025-08-20 2:30 ` Dapeng Mi [this message]
2025-08-25 10:24 ` [tip: perf/core] perf/x86: Print PMU counters bitmap in x86_pmu_show_pmu_cap() tip-bot2 for Dapeng Mi
2025-08-20 15:55 ` [Patch v3 0/7] x86 perf bug fixes and optimization Liang, Kan
2025-08-21 13:39 ` Peter Zijlstra
2025-08-22 5:29 ` Mi, Dapeng
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