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80dc2b3e25
Add the following functions: perf_evlist__open() perf_evlist__close() It's a simplified version of perf's evlist__open() without the sampling id index calculations. We can try to merge it in the future when we need it in some new libperf user. Also adopt some helper evlist traversing macros. In the future we can remove them from util/evlist.h, but that requires also some other changes. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190721112506.12306-69-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <perf/evlist.h>
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#include <perf/evsel.h>
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#include <linux/list.h>
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#include <internal/evlist.h>
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#include <internal/evsel.h>
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#include <linux/zalloc.h>
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#include <stdlib.h>
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#include <perf/cpumap.h>
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#include <perf/threadmap.h>
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void perf_evlist__init(struct perf_evlist *evlist)
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{
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INIT_LIST_HEAD(&evlist->entries);
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evlist->nr_entries = 0;
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}
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static void __perf_evlist__propagate_maps(struct perf_evlist *evlist,
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struct perf_evsel *evsel)
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{
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/*
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* We already have cpus for evsel (via PMU sysfs) so
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* keep it, if there's no target cpu list defined.
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*/
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if (!evsel->own_cpus || evlist->has_user_cpus) {
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perf_cpu_map__put(evsel->cpus);
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evsel->cpus = perf_cpu_map__get(evlist->cpus);
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} else if (evsel->cpus != evsel->own_cpus) {
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perf_cpu_map__put(evsel->cpus);
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evsel->cpus = perf_cpu_map__get(evsel->own_cpus);
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}
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perf_thread_map__put(evsel->threads);
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evsel->threads = perf_thread_map__get(evlist->threads);
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}
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static void perf_evlist__propagate_maps(struct perf_evlist *evlist)
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{
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struct perf_evsel *evsel;
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perf_evlist__for_each_evsel(evlist, evsel)
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__perf_evlist__propagate_maps(evlist, evsel);
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}
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void perf_evlist__add(struct perf_evlist *evlist,
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struct perf_evsel *evsel)
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{
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list_add_tail(&evsel->node, &evlist->entries);
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evlist->nr_entries += 1;
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__perf_evlist__propagate_maps(evlist, evsel);
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}
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void perf_evlist__remove(struct perf_evlist *evlist,
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struct perf_evsel *evsel)
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{
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list_del_init(&evsel->node);
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evlist->nr_entries -= 1;
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}
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struct perf_evlist *perf_evlist__new(void)
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{
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struct perf_evlist *evlist = zalloc(sizeof(*evlist));
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if (evlist != NULL)
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perf_evlist__init(evlist);
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return evlist;
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}
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struct perf_evsel *
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perf_evlist__next(struct perf_evlist *evlist, struct perf_evsel *prev)
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{
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struct perf_evsel *next;
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if (!prev) {
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next = list_first_entry(&evlist->entries,
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struct perf_evsel,
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node);
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} else {
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next = list_next_entry(prev, node);
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}
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/* Empty list is noticed here so don't need checking on entry. */
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if (&next->node == &evlist->entries)
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return NULL;
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return next;
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}
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void perf_evlist__delete(struct perf_evlist *evlist)
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{
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free(evlist);
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}
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void perf_evlist__set_maps(struct perf_evlist *evlist,
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struct perf_cpu_map *cpus,
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struct perf_thread_map *threads)
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{
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/*
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* Allow for the possibility that one or another of the maps isn't being
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* changed i.e. don't put it. Note we are assuming the maps that are
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* being applied are brand new and evlist is taking ownership of the
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* original reference count of 1. If that is not the case it is up to
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* the caller to increase the reference count.
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*/
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if (cpus != evlist->cpus) {
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perf_cpu_map__put(evlist->cpus);
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evlist->cpus = perf_cpu_map__get(cpus);
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}
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if (threads != evlist->threads) {
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perf_thread_map__put(evlist->threads);
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evlist->threads = perf_thread_map__get(threads);
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}
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perf_evlist__propagate_maps(evlist);
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}
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int perf_evlist__open(struct perf_evlist *evlist)
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{
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struct perf_evsel *evsel;
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int err;
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perf_evlist__for_each_entry(evlist, evsel) {
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err = perf_evsel__open(evsel, evsel->cpus, evsel->threads);
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if (err < 0)
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goto out_err;
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}
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return 0;
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out_err:
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perf_evlist__close(evlist);
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return err;
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}
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void perf_evlist__close(struct perf_evlist *evlist)
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{
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struct perf_evsel *evsel;
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perf_evlist__for_each_entry_reverse(evlist, evsel)
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perf_evsel__close(evsel);
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}
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