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| author | Kan Liang <kan.liang@linux.intel.com> | 2021-01-05 22:57:49 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-01-20 20:34:20 +0300 |
| commit | c1de7f3d84ca324c7cda85c3ce27b11741af2124 (patch) | |
| tree | eaee1e049eeffda4febe0edb1ac2c2acc37380ba /tools/perf/util/evsel.c | |
| parent | 06280e3b15fdaa28f02d995c0a74ec46f75db90a (diff) | |
| download | linux-c1de7f3d84ca324c7cda85c3ce27b11741af2124.tar.xz | |
perf record: Add support for PERF_SAMPLE_CODE_PAGE_SIZE
Adds the infrastructure to sample the code address page size.
Introduce a new --code-page-size option for perf record.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Originally-by: Stephane Eranian <eranian@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210105195752.43489-4-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evsel.c')
| -rw-r--r-- | tools/perf/util/evsel.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index f6668ece71d7..8b18ec56e266 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1195,6 +1195,9 @@ void evsel__config(struct evsel *evsel, struct record_opts *opts, if (opts->sample_data_page_size) evsel__set_sample_bit(evsel, DATA_PAGE_SIZE); + if (opts->sample_code_page_size) + evsel__set_sample_bit(evsel, CODE_PAGE_SIZE); + if (opts->record_switch_events) attr->context_switch = track; @@ -1880,7 +1883,12 @@ try_fallback: * Must probe features in the order they were added to the * perf_event_attr interface. */ - if (!perf_missing_features.data_page_size && + if (!perf_missing_features.code_page_size && + (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)) { + perf_missing_features.code_page_size = true; + pr_debug2_peo("Kernel has no PERF_SAMPLE_CODE_PAGE_SIZE support, bailing out\n"); + goto out_close; + } else if (!perf_missing_features.data_page_size && (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)) { perf_missing_features.data_page_size = true; pr_debug2_peo("Kernel has no PERF_SAMPLE_DATA_PAGE_SIZE support, bailing out\n"); @@ -2376,6 +2384,12 @@ int evsel__parse_sample(struct evsel *evsel, union perf_event *event, array++; } + data->code_page_size = 0; + if (type & PERF_SAMPLE_CODE_PAGE_SIZE) { + data->code_page_size = *array; + array++; + } + if (type & PERF_SAMPLE_AUX) { OVERFLOW_CHECK_u64(array); sz = *array++; @@ -2685,6 +2699,8 @@ int evsel__open_strerror(struct evsel *evsel, struct target *target, "We found oprofile daemon running, please stop it and try again."); break; case EINVAL: + if (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE && perf_missing_features.code_page_size) + return scnprintf(msg, size, "Asking for the code page size isn't supported by this kernel."); if (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE && perf_missing_features.data_page_size) return scnprintf(msg, size, "Asking for the data page size isn't supported by this kernel."); if (evsel->core.attr.write_backward && perf_missing_features.write_backward) |