linux/tools/perf/arch/x86/util/evsel.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _EVSEL_H
#define _EVSEL_H 1

bool evsel__sys_has_perf_metrics(const struct evsel *evsel);

#endif
perf record: Support sample-read topdown metric group for hybrid platforms With the hardware TopDown metrics feature, the sample-read feature should be supported for a TopDown group, e.g., sample a non-topdown event and read a Topdown metric group. But the current perf record code errors are out. For a TopDown metric group,the slots event must be the leader of the group, but the leader slots event doesn't support sampling. To support sample-read the TopDown metric group, uses the 2nd event of the group as the "leader" for the purposes of sampling. Only the platform with the TopDown metric feature supports sample-read the topdown group. In commit acb65150a47c ("perf record: Support sample-read topdown metric group"), it adds arch_topdown_sample_read() to indicate whether the TopDown group supports sample-read, it should only work on the non-hybrid systems, this patch extends the support for hybrid platforms. Before: # ./perf record -e "{cpu_core/slots/,cpu_core/cycles/,cpu_core/topdown-retiring/}:S" -a sleep 1 Error: The sys_perf_event_open() syscall returned with 22 (Invalid argument) for event (cpu_core/topdown-retiring/). /bin/dmesg \| grep -i perf may provide additional information. After: # ./perf record -e "{cpu_core/slots/,cpu_core/cycles/,cpu_core/topdown-retiring/}:S" -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.238 MB perf.data (369 samples) ] Fixes: acb65150a47c2bae ("perf record: Support sample-read topdown metric group") Reviewed-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Zhengjun Xing <zhengjun.xing@linux.intel.com> Acked-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20220602153603.1884710-1-zhengjun.xing@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> 2022-06-02 23:36:03 +08:00			`/* SPDX-License-Identifier: GPL-2.0 */`
			`#ifndef _EVSEL_H`
			`#define _EVSEL_H 1`

			`bool evsel__sys_has_perf_metrics(const struct evsel *evsel);`

			`#endif`