perf record: Prepare reading from multiple evlists in record__mmap_read_all()
Following commits introduce new evlists to record. This patch adjusts
record__mmap_read_all() and record__mmap_read(): converting original
record__mmap_read_all() to record__mmap_read_evlist(), read from one
evlist; makes record__mmap_read() reading from specific evlist.
record__mmap_read_all() will be improved to read from multiple evlists.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nilay Vaish <nilayvaish@gmail.com>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1467023052-146749-3-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 7eb8d7d..18e9abc 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -132,9 +132,9 @@
return backward_rb_find_range(data, mask, head, start, end);
}
-static int record__mmap_read(struct record *rec, int idx)
+static int record__mmap_read(struct record *rec, struct perf_evlist *evlist, int idx)
{
- struct perf_mmap *md = &rec->evlist->mmap[idx];
+ struct perf_mmap *md = &evlist->mmap[idx];
u64 head = perf_mmap__read_head(md);
u64 old = md->prev;
u64 end = head, start = old;
@@ -143,7 +143,7 @@
void *buf;
int rc = 0;
- if (rb_find_range(rec->evlist, data, md->mask, head,
+ if (rb_find_range(evlist, data, md->mask, head,
old, &start, &end))
return -1;
@@ -157,7 +157,7 @@
WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n");
md->prev = head;
- perf_evlist__mmap_consume(rec->evlist, idx);
+ perf_evlist__mmap_consume(evlist, idx);
return 0;
}
@@ -182,7 +182,7 @@
}
md->prev = head;
- perf_evlist__mmap_consume(rec->evlist, idx);
+ perf_evlist__mmap_consume(evlist, idx);
out:
return rc;
}
@@ -498,17 +498,20 @@
.type = PERF_RECORD_FINISHED_ROUND,
};
-static int record__mmap_read_all(struct record *rec)
+static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evlist)
{
u64 bytes_written = rec->bytes_written;
int i;
int rc = 0;
- for (i = 0; i < rec->evlist->nr_mmaps; i++) {
- struct auxtrace_mmap *mm = &rec->evlist->mmap[i].auxtrace_mmap;
+ if (!evlist)
+ return 0;
- if (rec->evlist->mmap[i].base) {
- if (record__mmap_read(rec, i) != 0) {
+ for (i = 0; i < evlist->nr_mmaps; i++) {
+ struct auxtrace_mmap *mm = &evlist->mmap[i].auxtrace_mmap;
+
+ if (evlist->mmap[i].base) {
+ if (record__mmap_read(rec, evlist, i) != 0) {
rc = -1;
goto out;
}
@@ -532,6 +535,17 @@
return rc;
}
+static int record__mmap_read_all(struct record *rec)
+{
+ int err;
+
+ err = record__mmap_read_evlist(rec, rec->evlist);
+ if (err)
+ return err;
+
+ return err;
+}
+
static void record__init_features(struct record *rec)
{
struct perf_session *session = rec->session;