forked from Minki/linux
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>
This commit is contained in:
Arnaldo Carvalho de Melo
parent
877108e42b
commit
f8a9530939
@ -1,11 +1,26 @@
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/*
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* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Parts came from builtin-{top,stat,record}.c, see those files for further
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* copyright notes.
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include <poll.h>
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#include "cpumap.h"
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#include "thread_map.h"
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#include "evlist.h"
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#include "evsel.h"
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#include "util.h"
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#include <sys/mman.h>
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#include <linux/bitops.h>
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#include <linux/hash.h>
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#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
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#define SID(e, x, y) xyarray__entry(e->id, x, y)
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void perf_evlist__init(struct perf_evlist *evlist)
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{
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int i;
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@ -88,6 +103,30 @@ void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd)
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evlist->nr_fds++;
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}
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static int perf_evlist__id_hash(struct perf_evlist *evlist, struct perf_evsel *evsel,
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int cpu, int thread, int fd)
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{
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struct perf_sample_id *sid;
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u64 read_data[4] = { 0, };
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int hash, id_idx = 1; /* The first entry is the counter value */
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if (!(evsel->attr.read_format & PERF_FORMAT_ID) ||
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read(fd, &read_data, sizeof(read_data)) == -1)
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return -1;
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if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
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++id_idx;
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if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
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++id_idx;
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sid = SID(evsel, cpu, thread);
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sid->id = read_data[id_idx];
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sid->evsel = evsel;
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hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS);
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hlist_add_head(&sid->node, &evlist->heads[hash]);
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return 0;
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}
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struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
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{
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struct hlist_head *head;
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@ -173,3 +212,106 @@ union perf_event *perf_evlist__read_on_cpu(struct perf_evlist *evlist, int cpu)
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return event;
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}
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void perf_evlist__munmap(struct perf_evlist *evlist, int ncpus)
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{
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int cpu;
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for (cpu = 0; cpu < ncpus; cpu++) {
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if (evlist->mmap[cpu].base != NULL) {
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munmap(evlist->mmap[cpu].base, evlist->mmap_len);
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evlist->mmap[cpu].base = NULL;
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}
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}
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}
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int perf_evlist__alloc_mmap(struct perf_evlist *evlist, int ncpus)
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{
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evlist->mmap = zalloc(ncpus * sizeof(struct perf_mmap));
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return evlist->mmap != NULL ? 0 : -ENOMEM;
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}
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static int __perf_evlist__mmap(struct perf_evlist *evlist, int cpu, int prot,
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int mask, int fd)
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{
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evlist->mmap[cpu].prev = 0;
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evlist->mmap[cpu].mask = mask;
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evlist->mmap[cpu].base = mmap(NULL, evlist->mmap_len, prot,
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MAP_SHARED, fd, 0);
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if (evlist->mmap[cpu].base == MAP_FAILED)
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return -1;
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perf_evlist__add_pollfd(evlist, fd);
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return 0;
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}
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/** perf_evlist__mmap - Create per cpu maps to receive events
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*
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* @evlist - list of events
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* @cpus - cpu map being monitored
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* @threads - threads map being monitored
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* @pages - map length in pages
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* @overwrite - overwrite older events?
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*
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* If overwrite is false the user needs to signal event consuption using:
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*
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* struct perf_mmap *m = &evlist->mmap[cpu];
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* unsigned int head = perf_mmap__read_head(m);
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*
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* perf_mmap__write_tail(m, head)
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*/
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int perf_evlist__mmap(struct perf_evlist *evlist, struct cpu_map *cpus,
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struct thread_map *threads, int pages, bool overwrite)
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{
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unsigned int page_size = sysconf(_SC_PAGE_SIZE);
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int mask = pages * page_size - 1, cpu;
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struct perf_evsel *first_evsel, *evsel;
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int thread, prot = PROT_READ | (overwrite ? 0 : PROT_WRITE);
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if (evlist->mmap == NULL &&
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perf_evlist__alloc_mmap(evlist, cpus->nr) < 0)
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return -ENOMEM;
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if (evlist->pollfd == NULL &&
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perf_evlist__alloc_pollfd(evlist, cpus->nr, threads->nr) < 0)
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return -ENOMEM;
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evlist->overwrite = overwrite;
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evlist->mmap_len = (pages + 1) * page_size;
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first_evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
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list_for_each_entry(evsel, &evlist->entries, node) {
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if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
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evsel->id == NULL &&
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perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0)
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return -ENOMEM;
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for (cpu = 0; cpu < cpus->nr; cpu++) {
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for (thread = 0; thread < threads->nr; thread++) {
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int fd = FD(evsel, cpu, thread);
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if (evsel->idx || thread) {
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if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT,
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FD(first_evsel, cpu, 0)) != 0)
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goto out_unmap;
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} else if (__perf_evlist__mmap(evlist, cpu, prot, mask, fd) < 0)
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goto out_unmap;
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if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
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perf_evlist__id_hash(evlist, evsel, cpu, thread, fd) < 0)
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goto out_unmap;
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}
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}
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}
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return 0;
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out_unmap:
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for (cpu = 0; cpu < cpus->nr; cpu++) {
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if (evlist->mmap[cpu].base != NULL) {
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munmap(evlist->mmap[cpu].base, evlist->mmap_len);
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evlist->mmap[cpu].base = NULL;
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}
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}
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return -1;
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}
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@ -6,6 +6,8 @@
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#include "event.h"
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struct pollfd;
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struct thread_map;
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struct cpu_map;
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#define PERF_EVLIST__HLIST_BITS 8
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#define PERF_EVLIST__HLIST_SIZE (1 << PERF_EVLIST__HLIST_BITS)
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@ -39,4 +41,9 @@ struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id);
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union perf_event *perf_evlist__read_on_cpu(struct perf_evlist *self, int cpu);
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int perf_evlist__alloc_mmap(struct perf_evlist *evlist, int ncpus);
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int perf_evlist__mmap(struct perf_evlist *evlist, struct cpu_map *cpus,
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struct thread_map *threads, int pages, bool overwrite);
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void perf_evlist__munmap(struct perf_evlist *evlist, int ncpus);
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#endif /* __PERF_EVLIST_H */
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@ -1,18 +1,19 @@
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/*
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* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Parts came from builtin-{top,stat,record}.c, see those files for further
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* copyright notes.
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include "evsel.h"
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#include "evlist.h"
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#include "../perf.h"
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#include "util.h"
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#include "cpumap.h"
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#include "thread_map.h"
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#include <unistd.h>
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#include <sys/mman.h>
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#include <linux/bitops.h>
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#include <linux/hash.h>
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#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
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#define SID(e, x, y) xyarray__entry(e->id, x, y)
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void perf_evsel__init(struct perf_evsel *evsel,
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struct perf_event_attr *attr, int idx)
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@ -74,24 +75,6 @@ void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
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}
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}
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void perf_evlist__munmap(struct perf_evlist *evlist, int ncpus)
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{
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int cpu;
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for (cpu = 0; cpu < ncpus; cpu++) {
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if (evlist->mmap[cpu].base != NULL) {
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munmap(evlist->mmap[cpu].base, evlist->mmap_len);
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evlist->mmap[cpu].base = NULL;
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}
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}
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}
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int perf_evlist__alloc_mmap(struct perf_evlist *evlist, int ncpus)
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{
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evlist->mmap = zalloc(ncpus * sizeof(struct perf_mmap));
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return evlist->mmap != NULL ? 0 : -ENOMEM;
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}
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void perf_evsel__exit(struct perf_evsel *evsel)
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{
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assert(list_empty(&evsel->node));
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@ -258,115 +241,6 @@ int perf_evsel__open_per_thread(struct perf_evsel *evsel,
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return __perf_evsel__open(evsel, &empty_cpu_map.map, threads, group, inherit);
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}
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static int __perf_evlist__mmap(struct perf_evlist *evlist, int cpu, int prot,
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int mask, int fd)
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{
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evlist->mmap[cpu].prev = 0;
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evlist->mmap[cpu].mask = mask;
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evlist->mmap[cpu].base = mmap(NULL, evlist->mmap_len, prot,
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MAP_SHARED, fd, 0);
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if (evlist->mmap[cpu].base == MAP_FAILED)
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return -1;
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perf_evlist__add_pollfd(evlist, fd);
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return 0;
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}
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static int perf_evlist__id_hash(struct perf_evlist *evlist, struct perf_evsel *evsel,
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int cpu, int thread, int fd)
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{
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struct perf_sample_id *sid;
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u64 read_data[4] = { 0, };
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int hash, id_idx = 1; /* The first entry is the counter value */
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if (!(evsel->attr.read_format & PERF_FORMAT_ID) ||
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read(fd, &read_data, sizeof(read_data)) == -1)
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return -1;
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if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
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++id_idx;
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if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
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++id_idx;
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sid = SID(evsel, cpu, thread);
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sid->id = read_data[id_idx];
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sid->evsel = evsel;
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hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS);
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hlist_add_head(&sid->node, &evlist->heads[hash]);
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return 0;
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}
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/** perf_evlist__mmap - Create per cpu maps to receive events
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*
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* @evlist - list of events
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* @cpus - cpu map being monitored
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* @threads - threads map being monitored
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* @pages - map length in pages
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* @overwrite - overwrite older events?
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*
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* If overwrite is false the user needs to signal event consuption using:
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*
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* struct perf_mmap *m = &evlist->mmap[cpu];
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* unsigned int head = perf_mmap__read_head(m);
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*
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* perf_mmap__write_tail(m, head)
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*/
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int perf_evlist__mmap(struct perf_evlist *evlist, struct cpu_map *cpus,
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struct thread_map *threads, int pages, bool overwrite)
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{
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unsigned int page_size = sysconf(_SC_PAGE_SIZE);
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int mask = pages * page_size - 1, cpu;
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struct perf_evsel *first_evsel, *evsel;
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int thread, prot = PROT_READ | (overwrite ? 0 : PROT_WRITE);
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if (evlist->mmap == NULL &&
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perf_evlist__alloc_mmap(evlist, cpus->nr) < 0)
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return -ENOMEM;
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if (evlist->pollfd == NULL &&
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perf_evlist__alloc_pollfd(evlist, cpus->nr, threads->nr) < 0)
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return -ENOMEM;
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evlist->overwrite = overwrite;
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evlist->mmap_len = (pages + 1) * page_size;
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first_evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
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list_for_each_entry(evsel, &evlist->entries, node) {
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if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
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evsel->id == NULL &&
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perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0)
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return -ENOMEM;
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for (cpu = 0; cpu < cpus->nr; cpu++) {
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for (thread = 0; thread < threads->nr; thread++) {
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int fd = FD(evsel, cpu, thread);
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if (evsel->idx || thread) {
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if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT,
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FD(first_evsel, cpu, 0)) != 0)
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goto out_unmap;
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} else if (__perf_evlist__mmap(evlist, cpu, prot, mask, fd) < 0)
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goto out_unmap;
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if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
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perf_evlist__id_hash(evlist, evsel, cpu, thread, fd) < 0)
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goto out_unmap;
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}
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}
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}
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return 0;
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out_unmap:
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for (cpu = 0; cpu < cpus->nr; cpu++) {
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if (evlist->mmap[cpu].base != NULL) {
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munmap(evlist->mmap[cpu].base, evlist->mmap_len);
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evlist->mmap[cpu].base = NULL;
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}
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}
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return -1;
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}
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static int perf_event__parse_id_sample(const union perf_event *event, u64 type,
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struct perf_sample *sample)
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{
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@ -60,7 +60,6 @@ void perf_evsel__delete(struct perf_evsel *evsel);
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int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
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int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
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int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
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int perf_evlist__alloc_mmap(struct perf_evlist *evlist, int ncpus);
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void perf_evsel__free_fd(struct perf_evsel *evsel);
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void perf_evsel__free_id(struct perf_evsel *evsel);
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void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
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@ -71,9 +70,6 @@ int perf_evsel__open_per_thread(struct perf_evsel *evsel,
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struct thread_map *threads, bool group, bool inherit);
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int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
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struct thread_map *threads, bool group, bool inherit);
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int perf_evlist__mmap(struct perf_evlist *evlist, struct cpu_map *cpus,
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struct thread_map *threads, int pages, bool overwrite);
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void perf_evlist__munmap(struct perf_evlist *evlist, int ncpus);
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#define perf_evsel__match(evsel, t, c) \
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(evsel->attr.type == PERF_TYPE_##t && \
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