diff options
author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-01-30 10:46:46 -0200 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-01-30 11:41:13 -0200 |
commit | f8a9530939ed87b9a1b1a038b90e355098b679a2 (patch) | |
tree | a24954b748120ae6f83f30c00af747c22acfb89e /tools/perf/util/evsel.c | |
parent | 877108e42b1b9ba64857c4030cf356ecc120fd18 (diff) |
perf evlist: Move evlist methods to evlist.c
They were on evsel.c because they came from refactoring existing evsel
methods, so, to make reviewing the changes easier, I kept it there, now
its a plain move.
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
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 | 144 |
1 files changed, 9 insertions, 135 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index fddeb08f48a..2720bc1d578 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1,18 +1,19 @@ +/* + * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> + * + * Parts came from builtin-{top,stat,record}.c, see those files for further + * copyright notes. + * + * Released under the GPL v2. (and only v2, not any later version) + */ + #include "evsel.h" #include "evlist.h" -#include "../perf.h" #include "util.h" #include "cpumap.h" #include "thread_map.h" -#include <unistd.h> -#include <sys/mman.h> - -#include <linux/bitops.h> -#include <linux/hash.h> - #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) -#define SID(e, x, y) xyarray__entry(e->id, x, y) void perf_evsel__init(struct perf_evsel *evsel, struct perf_event_attr *attr, int idx) @@ -74,24 +75,6 @@ void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads) } } -void perf_evlist__munmap(struct perf_evlist *evlist, int ncpus) -{ - int cpu; - - for (cpu = 0; cpu < ncpus; cpu++) { - if (evlist->mmap[cpu].base != NULL) { - munmap(evlist->mmap[cpu].base, evlist->mmap_len); - evlist->mmap[cpu].base = NULL; - } - } -} - -int perf_evlist__alloc_mmap(struct perf_evlist *evlist, int ncpus) -{ - evlist->mmap = zalloc(ncpus * sizeof(struct perf_mmap)); - return evlist->mmap != NULL ? 0 : -ENOMEM; -} - void perf_evsel__exit(struct perf_evsel *evsel) { assert(list_empty(&evsel->node)); @@ -258,115 +241,6 @@ int perf_evsel__open_per_thread(struct perf_evsel *evsel, return __perf_evsel__open(evsel, &empty_cpu_map.map, threads, group, inherit); } -static int __perf_evlist__mmap(struct perf_evlist *evlist, int cpu, int prot, - int mask, int fd) -{ - evlist->mmap[cpu].prev = 0; - evlist->mmap[cpu].mask = mask; - evlist->mmap[cpu].base = mmap(NULL, evlist->mmap_len, prot, - MAP_SHARED, fd, 0); - if (evlist->mmap[cpu].base == MAP_FAILED) - return -1; - - perf_evlist__add_pollfd(evlist, fd); - return 0; -} - -static int perf_evlist__id_hash(struct perf_evlist *evlist, struct perf_evsel *evsel, - int cpu, int thread, int fd) -{ - struct perf_sample_id *sid; - u64 read_data[4] = { 0, }; - int hash, id_idx = 1; /* The first entry is the counter value */ - - if (!(evsel->attr.read_format & PERF_FORMAT_ID) || - read(fd, &read_data, sizeof(read_data)) == -1) - return -1; - - if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) - ++id_idx; - if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) - ++id_idx; - - sid = SID(evsel, cpu, thread); - sid->id = read_data[id_idx]; - sid->evsel = evsel; - hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); - hlist_add_head(&sid->node, &evlist->heads[hash]); - return 0; -} - -/** perf_evlist__mmap - Create per cpu maps to receive events - * - * @evlist - list of events - * @cpus - cpu map being monitored - * @threads - threads map being monitored - * @pages - map length in pages - * @overwrite - overwrite older events? - * - * If overwrite is false the user needs to signal event consuption using: - * - * struct perf_mmap *m = &evlist->mmap[cpu]; - * unsigned int head = perf_mmap__read_head(m); - * - * perf_mmap__write_tail(m, head) - */ -int perf_evlist__mmap(struct perf_evlist *evlist, struct cpu_map *cpus, - struct thread_map *threads, int pages, bool overwrite) -{ - unsigned int page_size = sysconf(_SC_PAGE_SIZE); - int mask = pages * page_size - 1, cpu; - struct perf_evsel *first_evsel, *evsel; - int thread, prot = PROT_READ | (overwrite ? 0 : PROT_WRITE); - - if (evlist->mmap == NULL && - perf_evlist__alloc_mmap(evlist, cpus->nr) < 0) - return -ENOMEM; - - if (evlist->pollfd == NULL && - perf_evlist__alloc_pollfd(evlist, cpus->nr, threads->nr) < 0) - return -ENOMEM; - - evlist->overwrite = overwrite; - evlist->mmap_len = (pages + 1) * page_size; - first_evsel = list_entry(evlist->entries.next, struct perf_evsel, node); - - list_for_each_entry(evsel, &evlist->entries, node) { - if ((evsel->attr.read_format & PERF_FORMAT_ID) && - evsel->id == NULL && - perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0) - return -ENOMEM; - - for (cpu = 0; cpu < cpus->nr; cpu++) { - for (thread = 0; thread < threads->nr; thread++) { - int fd = FD(evsel, cpu, thread); - - if (evsel->idx || thread) { - if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, - FD(first_evsel, cpu, 0)) != 0) - goto out_unmap; - } else if (__perf_evlist__mmap(evlist, cpu, prot, mask, fd) < 0) - goto out_unmap; - - if ((evsel->attr.read_format & PERF_FORMAT_ID) && - perf_evlist__id_hash(evlist, evsel, cpu, thread, fd) < 0) - goto out_unmap; - } - } - } - - return 0; - -out_unmap: - for (cpu = 0; cpu < cpus->nr; cpu++) { - if (evlist->mmap[cpu].base != NULL) { - munmap(evlist->mmap[cpu].base, evlist->mmap_len); - evlist->mmap[cpu].base = NULL; - } - } - return -1; -} - static int perf_event__parse_id_sample(const union perf_event *event, u64 type, struct perf_sample *sample) { |