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Subject[tip:perf/core] perf evlist: Move evlist methods to evlist.c
Commit-ID:  f8a9530939ed87b9a1b1a038b90e355098b679a2
Gitweb: http://git.kernel.org/tip/f8a9530939ed87b9a1b1a038b90e355098b679a2
Author: Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Sun, 30 Jan 2011 10:46:46 -0200
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Sun, 30 Jan 2011 11:41:13 -0200

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>
---
tools/perf/util/evlist.c | 142 +++++++++++++++++++++++++++++++++++++++++++++
tools/perf/util/evlist.h | 7 ++
tools/perf/util/evsel.c | 144 +++-------------------------------------------
tools/perf/util/evsel.h | 4 -
4 files changed, 158 insertions(+), 139 deletions(-)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 917fc18..dcd5932 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1,11 +1,26 @@
+/*
+ * 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 <poll.h>
+#include "cpumap.h"
+#include "thread_map.h"
#include "evlist.h"
#include "evsel.h"
#include "util.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_evlist__init(struct perf_evlist *evlist)
{
int i;
@@ -88,6 +103,30 @@ void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd)
evlist->nr_fds++;
}

+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;
+}
+
struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
{
struct hlist_head *head;
@@ -173,3 +212,106 @@ union perf_event *perf_evlist__read_on_cpu(struct perf_evlist *evlist, int cpu)

return event;
}
+
+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;
+}
+
+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;
+}
+
+/** 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;
+}
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 022ae40..85aca6e 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -6,6 +6,8 @@
#include "event.h"

struct pollfd;
+struct thread_map;
+struct cpu_map;

#define PERF_EVLIST__HLIST_BITS 8
#define PERF_EVLIST__HLIST_SIZE (1 << PERF_EVLIST__HLIST_BITS)
@@ -39,4 +41,9 @@ struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id);

union perf_event *perf_evlist__read_on_cpu(struct perf_evlist *self, int cpu);

+int perf_evlist__alloc_mmap(struct perf_evlist *evlist, int ncpus);
+int perf_evlist__mmap(struct perf_evlist *evlist, struct cpu_map *cpus,
+ struct thread_map *threads, int pages, bool overwrite);
+void perf_evlist__munmap(struct perf_evlist *evlist, int ncpus);
+
#endif /* __PERF_EVLIST_H */
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index fddeb08..2720bc1 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)
{
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 7962e75..eecdc3a 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -60,7 +60,6 @@ void perf_evsel__delete(struct perf_evsel *evsel);
int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
-int perf_evlist__alloc_mmap(struct perf_evlist *evlist, int ncpus);
void perf_evsel__free_fd(struct perf_evsel *evsel);
void perf_evsel__free_id(struct perf_evsel *evsel);
void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
@@ -71,9 +70,6 @@ int perf_evsel__open_per_thread(struct perf_evsel *evsel,
struct thread_map *threads, bool group, bool inherit);
int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
struct thread_map *threads, bool group, bool inherit);
-int perf_evlist__mmap(struct perf_evlist *evlist, struct cpu_map *cpus,
- struct thread_map *threads, int pages, bool overwrite);
-void perf_evlist__munmap(struct perf_evlist *evlist, int ncpus);

#define perf_evsel__match(evsel, t, c) \
(evsel->attr.type == PERF_TYPE_##t && \

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