From: Jiri Olsa <jo...@kernel.org> Move the perf_evsel__read() function to libperf as a public interface together with struct perf_counts_values for returning counter values.
Signed-off-by: Jiri Olsa <jo...@kernel.org> Cc: Alexander Shishkin <alexander.shish...@linux.intel.com> Cc: Alexey Budankov <alexey.budan...@linux.intel.com> Cc: Andi Kleen <a...@linux.intel.com> Cc: Michael Petlan <mpet...@redhat.com> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Peter Zijlstra <pet...@infradead.org> Link: http://lkml.kernel.org/r/20190721112506.12306-65-jo...@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/lib/evsel.c | 42 +++++++++++++++++++++++ tools/perf/lib/include/internal/evsel.h | 1 + tools/perf/lib/include/perf/evsel.h | 14 ++++++++ tools/perf/lib/libperf.map | 1 + tools/perf/tests/event-times.c | 2 +- tools/perf/util/counts.h | 12 +------ tools/perf/util/evsel.c | 45 ++----------------------- tools/perf/util/evsel.h | 3 -- 8 files changed, 62 insertions(+), 58 deletions(-) diff --git a/tools/perf/lib/evsel.c b/tools/perf/lib/evsel.c index 50f09e939229..390fcf9107c1 100644 --- a/tools/perf/lib/evsel.c +++ b/tools/perf/lib/evsel.c @@ -12,6 +12,7 @@ #include <internal/xyarray.h> #include <internal/cpumap.h> #include <internal/threadmap.h> +#include <internal/lib.h> #include <linux/string.h> void perf_evsel__init(struct perf_evsel *evsel, struct perf_event_attr *attr) @@ -137,3 +138,44 @@ void perf_evsel__close(struct perf_evsel *evsel) perf_evsel__close_fd(evsel); perf_evsel__free_fd(evsel); } + +int perf_evsel__read_size(struct perf_evsel *evsel) +{ + u64 read_format = evsel->attr.read_format; + int entry = sizeof(u64); /* value */ + int size = 0; + int nr = 1; + + if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) + size += sizeof(u64); + + if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) + size += sizeof(u64); + + if (read_format & PERF_FORMAT_ID) + entry += sizeof(u64); + + if (read_format & PERF_FORMAT_GROUP) { + nr = evsel->nr_members; + size += sizeof(u64); + } + + size += entry * nr; + return size; +} + +int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread, + struct perf_counts_values *count) +{ + size_t size = perf_evsel__read_size(evsel); + + memset(count, 0, sizeof(*count)); + + if (FD(evsel, cpu, thread) < 0) + return -EINVAL; + + if (readn(FD(evsel, cpu, thread), count->values, size) <= 0) + return -errno; + + return 0; +} diff --git a/tools/perf/lib/include/internal/evsel.h b/tools/perf/lib/include/internal/evsel.h index 878e2cf41ffc..89bae3720d67 100644 --- a/tools/perf/lib/include/internal/evsel.h +++ b/tools/perf/lib/include/internal/evsel.h @@ -23,5 +23,6 @@ struct perf_evsel { int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads); void perf_evsel__close_fd(struct perf_evsel *evsel); void perf_evsel__free_fd(struct perf_evsel *evsel); +int perf_evsel__read_size(struct perf_evsel *evsel); #endif /* __LIBPERF_INTERNAL_EVSEL_H */ diff --git a/tools/perf/lib/include/perf/evsel.h b/tools/perf/lib/include/perf/evsel.h index aa5c48f822d2..16ae3f873280 100644 --- a/tools/perf/lib/include/perf/evsel.h +++ b/tools/perf/lib/include/perf/evsel.h @@ -2,6 +2,7 @@ #ifndef __LIBPERF_EVSEL_H #define __LIBPERF_EVSEL_H +#include <stdint.h> #include <perf/core.h> struct perf_evsel; @@ -9,6 +10,17 @@ struct perf_event_attr; struct perf_cpu_map; struct perf_thread_map; +struct perf_counts_values { + union { + struct { + uint64_t val; + uint64_t ena; + uint64_t run; + }; + uint64_t values[3]; + }; +}; + LIBPERF_API void perf_evsel__init(struct perf_evsel *evsel, struct perf_event_attr *attr); LIBPERF_API struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr); @@ -16,5 +28,7 @@ LIBPERF_API void perf_evsel__delete(struct perf_evsel *evsel); LIBPERF_API int perf_evsel__open(struct perf_evsel *evsel, struct perf_cpu_map *cpus, struct perf_thread_map *threads); LIBPERF_API void perf_evsel__close(struct perf_evsel *evsel); +LIBPERF_API int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread, + struct perf_counts_values *count); #endif /* __LIBPERF_EVSEL_H */ diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map index 0b90999dcdcb..2e23cf420cce 100644 --- a/tools/perf/lib/libperf.map +++ b/tools/perf/lib/libperf.map @@ -16,6 +16,7 @@ LIBPERF_0.0.1 { perf_evsel__init; perf_evsel__open; perf_evsel__close; + perf_evsel__read; perf_evlist__new; perf_evlist__delete; perf_evlist__init; diff --git a/tools/perf/tests/event-times.c b/tools/perf/tests/event-times.c index 00adba86403b..714e3611352c 100644 --- a/tools/perf/tests/event-times.c +++ b/tools/perf/tests/event-times.c @@ -196,7 +196,7 @@ static int test_times(int (attach)(struct evlist *), TEST_ASSERT_VAL("failed to detach", !detach(evlist)); - perf_evsel__read(evsel, 0, 0, &count); + perf_evsel__read(&evsel->core, 0, 0, &count); err = !(count.ena == count.run); diff --git a/tools/perf/util/counts.h b/tools/perf/util/counts.h index bbfac9ecf642..13430f353c19 100644 --- a/tools/perf/util/counts.h +++ b/tools/perf/util/counts.h @@ -3,17 +3,7 @@ #define __PERF_COUNTS_H #include <internal/xyarray.h> - -struct perf_counts_values { - union { - struct { - u64 val; - u64 ena; - u64 run; - }; - u64 values[3]; - }; -}; +#include <perf/evsel.h> struct perf_counts { s8 scaled; diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 8d8ed36377f5..0957ec24f518 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1346,53 +1346,12 @@ void perf_counts_values__scale(struct perf_counts_values *count, *pscaled = scaled; } -static int perf_evsel__read_size(struct evsel *evsel) -{ - u64 read_format = evsel->core.attr.read_format; - int entry = sizeof(u64); /* value */ - int size = 0; - int nr = 1; - - if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) - size += sizeof(u64); - - if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) - size += sizeof(u64); - - if (read_format & PERF_FORMAT_ID) - entry += sizeof(u64); - - if (read_format & PERF_FORMAT_GROUP) { - nr = evsel->core.nr_members; - size += sizeof(u64); - } - - size += entry * nr; - return size; -} - -int perf_evsel__read(struct evsel *evsel, int cpu, int thread, - struct perf_counts_values *count) -{ - size_t size = perf_evsel__read_size(evsel); - - memset(count, 0, sizeof(*count)); - - if (FD(evsel, cpu, thread) < 0) - return -EINVAL; - - if (readn(FD(evsel, cpu, thread), count->values, size) <= 0) - return -errno; - - return 0; -} - static int perf_evsel__read_one(struct evsel *evsel, int cpu, int thread) { struct perf_counts_values *count = perf_counts(evsel->counts, cpu, thread); - return perf_evsel__read(evsel, cpu, thread, count); + return perf_evsel__read(&evsel->core, cpu, thread, count); } static void @@ -1453,7 +1412,7 @@ perf_evsel__read_group(struct evsel *leader, int cpu, int thread) { struct perf_stat_evsel *ps = leader->stats; u64 read_format = leader->core.attr.read_format; - int size = perf_evsel__read_size(leader); + int size = perf_evsel__read_size(&leader->core); u64 *data = ps->group_data; if (!(read_format & PERF_FORMAT_ID)) diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 03fc8edad492..57e315d8158e 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -336,9 +336,6 @@ static inline bool perf_evsel__match2(struct evsel *e1, (a)->core.attr.type == (b)->core.attr.type && \ (a)->core.attr.config == (b)->core.attr.config) -int perf_evsel__read(struct evsel *evsel, int cpu, int thread, - struct perf_counts_values *count); - int perf_evsel__read_counter(struct evsel *evsel, int cpu, int thread); int __perf_evsel__read_on_cpu(struct evsel *evsel, -- 2.21.0
