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1647cd5b88
Request the topdown metric group of a level with the metrics in the group 'TopdownL<level>' rather than through specific events. As more topdown levels are supported this way, such as 6 on Intel Ice Lake, default to just showing the level 1 metrics. This can be overridden using '--td-level'. Rather than determine the maximum topdown level from sysfs, use the metric group names. Remove some now unused topdown code. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexandre Torgue <alexandre.torgue@foss.st.com> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Caleb Biggers <caleb.biggers@intel.com> Cc: Eduard Zingerman <eddyz87@gmail.com> Cc: Florian Fischer <florian.fischer@muhq.space> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Perry Taylor <perry.taylor@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Sandipan Das <sandipan.das@amd.com> Cc: Sean Christopherson <seanjc@google.com> Cc: Stephane Eranian <eranian@google.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-stm32@st-md-mailman.stormreply.com Link: https://lore.kernel.org/r/20230219092848.639226-41-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include "api/fs/fs.h"
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#include "util/evsel.h"
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#include "util/pmu.h"
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#include "util/topdown.h"
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#include "topdown.h"
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#include "evsel.h"
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/* Check whether there is a PMU which supports the perf metrics. */
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bool topdown_sys_has_perf_metrics(void)
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{
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static bool has_perf_metrics;
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static bool cached;
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struct perf_pmu *pmu;
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if (cached)
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return has_perf_metrics;
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/*
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* The perf metrics feature is a core PMU feature.
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* The PERF_TYPE_RAW type is the type of a core PMU.
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* The slots event is only available when the core PMU
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* supports the perf metrics feature.
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*/
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pmu = perf_pmu__find_by_type(PERF_TYPE_RAW);
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if (pmu && pmu_have_event(pmu->name, "slots"))
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has_perf_metrics = true;
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cached = true;
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return has_perf_metrics;
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}
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#define TOPDOWN_SLOTS 0x0400
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/*
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* Check whether a topdown group supports sample-read.
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*
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* Only Topdown metric supports sample-read. The slots
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* event must be the leader of the topdown group.
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*/
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bool arch_topdown_sample_read(struct evsel *leader)
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{
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if (!evsel__sys_has_perf_metrics(leader))
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return false;
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if (leader->core.attr.config == TOPDOWN_SLOTS)
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return true;
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return false;
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}
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