libperf: Add perf_evsel__alloc_id/perf_evsel__free_id functions
Add perf_evsel__alloc_id()/perf_evsel__free_id() functions to libperf as internal functions. Move 'struct perf_sample_id' to internal/evsel.h header and change 'struct perf_sample_id::evsel' to 'struct perf_evsel' and the related code that touches it. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lore.kernel.org/lkml/20190913132355.21634-28-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -230,3 +230,33 @@ struct perf_event_attr *perf_evsel__attr(struct perf_evsel *evsel)
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{
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return &evsel->attr;
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}
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int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
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{
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if (ncpus == 0 || nthreads == 0)
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return 0;
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if (evsel->system_wide)
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nthreads = 1;
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evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
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if (evsel->sample_id == NULL)
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return -ENOMEM;
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evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
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if (evsel->id == NULL) {
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xyarray__delete(evsel->sample_id);
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evsel->sample_id = NULL;
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return -ENOMEM;
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}
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return 0;
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}
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void perf_evsel__free_id(struct perf_evsel *evsel)
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{
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xyarray__delete(evsel->sample_id);
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evsel->sample_id = NULL;
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zfree(&evsel->id);
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evsel->ids = 0;
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}
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@ -5,11 +5,35 @@
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#include <linux/types.h>
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#include <linux/perf_event.h>
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#include <stdbool.h>
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#include <sys/types.h>
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struct perf_cpu_map;
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struct perf_thread_map;
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struct xyarray;
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/*
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* Per fd, to map back from PERF_SAMPLE_ID to evsel, only used when there are
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* more than one entry in the evlist.
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*/
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struct perf_sample_id {
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struct hlist_node node;
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u64 id;
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struct perf_evsel *evsel;
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/*
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* 'idx' will be used for AUX area sampling. A sample will have AUX area
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* data that will be queued for decoding, where there are separate
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* queues for each CPU (per-cpu tracing) or task (per-thread tracing).
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* The sample ID can be used to lookup 'idx' which is effectively the
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* queue number.
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*/
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int idx;
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int cpu;
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pid_t tid;
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/* Holds total ID period value for PERF_SAMPLE_READ processing. */
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u64 period;
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};
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struct perf_evsel {
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struct list_head node;
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struct perf_event_attr attr;
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@ -32,4 +56,7 @@ void perf_evsel__free_fd(struct perf_evsel *evsel);
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int perf_evsel__read_size(struct perf_evsel *evsel);
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int perf_evsel__apply_filter(struct perf_evsel *evsel, const char *filter);
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int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
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void perf_evsel__free_id(struct perf_evsel *evsel);
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#endif /* __LIBPERF_INTERNAL_EVSEL_H */
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@ -95,7 +95,7 @@ int test__event_update(struct test *test __maybe_unused, int subtest __maybe_unu
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evsel = perf_evlist__first(evlist);
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TEST_ASSERT_VAL("failed to allocate ids",
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!perf_evsel__alloc_id(evsel, 1, 1));
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!perf_evsel__alloc_id(&evsel->core, 1, 1));
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perf_evlist__id_add(evlist, evsel, 0, 0, 123);
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@ -469,7 +469,7 @@ static void perf_evlist__id_hash(struct evlist *evlist,
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struct perf_sample_id *sid = SID(evsel, cpu, thread);
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sid->id = id;
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sid->evsel = evsel;
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sid->evsel = &evsel->core;
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hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS);
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hlist_add_head(&sid->node, &evlist->core.heads[hash]);
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}
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@ -563,7 +563,7 @@ struct evsel *perf_evlist__id2evsel(struct evlist *evlist, u64 id)
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sid = perf_evlist__id2sid(evlist, id);
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if (sid)
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return sid->evsel;
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return container_of(sid->evsel, struct evsel, core);
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if (!perf_evlist__sample_id_all(evlist))
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return perf_evlist__first(evlist);
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@ -581,7 +581,7 @@ struct evsel *perf_evlist__id2evsel_strict(struct evlist *evlist,
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sid = perf_evlist__id2sid(evlist, id);
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if (sid)
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return sid->evsel;
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return container_of(sid->evsel, struct evsel, core);
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return NULL;
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}
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@ -635,7 +635,7 @@ struct evsel *perf_evlist__event2evsel(struct evlist *evlist,
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hlist_for_each_entry(sid, head, node) {
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if (sid->id == id)
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return sid->evsel;
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return container_of(sid->evsel, struct evsel, core);
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}
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return NULL;
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}
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@ -1018,7 +1018,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
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evlist__for_each_entry(evlist, evsel) {
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if ((evsel->core.attr.read_format & PERF_FORMAT_ID) &&
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evsel->core.sample_id == NULL &&
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perf_evsel__alloc_id(evsel, perf_cpu_map__nr(cpus), threads->nr) < 0)
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perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr) < 0)
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return -ENOMEM;
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}
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@ -1227,36 +1227,6 @@ int evsel__disable(struct evsel *evsel)
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return err;
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}
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int perf_evsel__alloc_id(struct evsel *evsel, int ncpus, int nthreads)
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{
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if (ncpus == 0 || nthreads == 0)
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return 0;
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if (evsel->core.system_wide)
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nthreads = 1;
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evsel->core.sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
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if (evsel->core.sample_id == NULL)
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return -ENOMEM;
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evsel->core.id = zalloc(ncpus * nthreads * sizeof(u64));
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if (evsel->core.id == NULL) {
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xyarray__delete(evsel->core.sample_id);
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evsel->core.sample_id = NULL;
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return -ENOMEM;
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}
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return 0;
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}
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static void perf_evsel__free_id(struct evsel *evsel)
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{
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xyarray__delete(evsel->core.sample_id);
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evsel->core.sample_id = NULL;
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zfree(&evsel->core.id);
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evsel->core.ids = 0;
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}
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static void perf_evsel__free_config_terms(struct evsel *evsel)
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{
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struct perf_evsel_config_term *term, *h;
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@ -1273,7 +1243,7 @@ void perf_evsel__exit(struct evsel *evsel)
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assert(evsel->evlist == NULL);
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perf_evsel__free_counts(evsel);
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perf_evsel__free_fd(&evsel->core);
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perf_evsel__free_id(evsel);
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perf_evsel__free_id(&evsel->core);
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perf_evsel__free_config_terms(evsel);
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cgroup__put(evsel->cgrp);
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perf_cpu_map__put(evsel->core.cpus);
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@ -1992,7 +1962,7 @@ out_close:
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void evsel__close(struct evsel *evsel)
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{
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perf_evsel__close(&evsel->core);
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perf_evsel__free_id(evsel);
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perf_evsel__free_id(&evsel->core);
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}
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int perf_evsel__open_per_cpu(struct evsel *evsel,
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@ -2706,7 +2676,7 @@ int perf_evsel__store_ids(struct evsel *evsel, struct evlist *evlist)
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struct perf_cpu_map *cpus = evsel->core.cpus;
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struct perf_thread_map *threads = evsel->core.threads;
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if (perf_evsel__alloc_id(evsel, cpus->nr, threads->nr))
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if (perf_evsel__alloc_id(&evsel->core, cpus->nr, threads->nr))
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return -ENOMEM;
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return store_evsel_ids(evsel, evlist);
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@ -17,29 +17,6 @@ struct addr_location;
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struct evsel;
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union perf_event;
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/*
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* Per fd, to map back from PERF_SAMPLE_ID to evsel, only used when there are
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* more than one entry in the evlist.
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*/
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struct perf_sample_id {
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struct hlist_node node;
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u64 id;
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struct evsel *evsel;
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/*
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* 'idx' will be used for AUX area sampling. A sample will have AUX area
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* data that will be queued for decoding, where there are separate
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* queues for each CPU (per-cpu tracing) or task (per-thread tracing).
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* The sample ID can be used to lookup 'idx' which is effectively the
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* queue number.
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*/
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int idx;
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int cpu;
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pid_t tid;
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/* Holds total ID period value for PERF_SAMPLE_READ processing. */
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u64 period;
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};
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struct cgroup;
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/*
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@ -272,8 +249,6 @@ const char *perf_evsel__name(struct evsel *evsel);
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const char *perf_evsel__group_name(struct evsel *evsel);
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int perf_evsel__group_desc(struct evsel *evsel, char *buf, size_t size);
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int perf_evsel__alloc_id(struct evsel *evsel, int ncpus, int nthreads);
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void __perf_evsel__set_sample_bit(struct evsel *evsel,
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enum perf_event_sample_format bit);
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void __perf_evsel__reset_sample_bit(struct evsel *evsel,
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@ -3609,7 +3609,7 @@ int perf_session__read_header(struct perf_session *session)
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* for allocating the perf_sample_id table we fake 1 cpu and
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* hattr->ids threads.
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*/
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if (perf_evsel__alloc_id(evsel, 1, nr_ids))
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if (perf_evsel__alloc_id(&evsel->core, 1, nr_ids))
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goto out_delete_evlist;
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lseek(fd, f_attr.ids.offset, SEEK_SET);
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* for allocating the perf_sample_id table we fake 1 cpu and
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* hattr->ids threads.
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*/
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if (perf_evsel__alloc_id(evsel, 1, n_ids))
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if (perf_evsel__alloc_id(&evsel->core, 1, n_ids))
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return -ENOMEM;
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for (i = 0; i < n_ids; i++) {
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@ -1324,6 +1324,7 @@ static int deliver_sample_value(struct evlist *evlist,
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struct machine *machine)
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{
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struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
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struct evsel *evsel;
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if (sid) {
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sample->id = v->id;
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if (!sample->period)
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return 0;
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return tool->sample(tool, event, sample, sid->evsel, machine);
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evsel = container_of(sid->evsel, struct evsel, core);
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return tool->sample(tool, event, sample, evsel, machine);
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}
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static int deliver_sample_group(struct evlist *evlist,
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