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-rw-r--r--tools/perf/builtin-record.c67
1 files changed, 52 insertions, 15 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 408d6477c960..4736dc96c4ca 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -196,16 +196,35 @@ static int record__aio_complete(struct perf_mmap *md, struct aiocb *cblock)
return rc;
}
-static void record__aio_sync(struct perf_mmap *md)
+static int record__aio_sync(struct perf_mmap *md, bool sync_all)
{
- struct aiocb *cblock = &md->aio.cblock;
+ struct aiocb **aiocb = md->aio.aiocb;
+ struct aiocb *cblocks = md->aio.cblocks;
struct timespec timeout = { 0, 1000 * 1000 * 1 }; /* 1ms */
+ int i, do_suspend;
do {
- if (cblock->aio_fildes == -1 || record__aio_complete(md, cblock))
- return;
+ do_suspend = 0;
+ for (i = 0; i < md->aio.nr_cblocks; ++i) {
+ if (cblocks[i].aio_fildes == -1 || record__aio_complete(md, &cblocks[i])) {
+ if (sync_all)
+ aiocb[i] = NULL;
+ else
+ return i;
+ } else {
+ /*
+ * Started aio write is not complete yet
+ * so it has to be waited before the
+ * next allocation.
+ */
+ aiocb[i] = &cblocks[i];
+ do_suspend = 1;
+ }
+ }
+ if (!do_suspend)
+ return -1;
- while (aio_suspend((const struct aiocb**)&cblock, 1, &timeout)) {
+ while (aio_suspend((const struct aiocb **)aiocb, md->aio.nr_cblocks, &timeout)) {
if (!(errno == EAGAIN || errno == EINTR))
pr_err("failed to sync perf data, error: %m\n");
}
@@ -252,28 +271,36 @@ static void record__aio_mmap_read_sync(struct record *rec)
struct perf_mmap *map = &maps[i];
if (map->base)
- record__aio_sync(map);
+ record__aio_sync(map, true);
}
}
static int nr_cblocks_default = 1;
+static int nr_cblocks_max = 4;
static int record__aio_parse(const struct option *opt,
- const char *str __maybe_unused,
+ const char *str,
int unset)
{
struct record_opts *opts = (struct record_opts *)opt->value;
- if (unset)
+ if (unset) {
opts->nr_cblocks = 0;
- else
- opts->nr_cblocks = nr_cblocks_default;
+ } else {
+ if (str)
+ opts->nr_cblocks = strtol(str, NULL, 0);
+ if (!opts->nr_cblocks)
+ opts->nr_cblocks = nr_cblocks_default;
+ }
return 0;
}
#else /* HAVE_AIO_SUPPORT */
-static void record__aio_sync(struct perf_mmap *md __maybe_unused)
+static int nr_cblocks_max = 0;
+
+static int record__aio_sync(struct perf_mmap *md __maybe_unused, bool sync_all __maybe_unused)
{
+ return -1;
}
static int record__aio_pushfn(void *to __maybe_unused, struct aiocb *cblock __maybe_unused,
@@ -728,12 +755,13 @@ static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evli
goto out;
}
} else {
+ int idx;
/*
* Call record__aio_sync() to wait till map->data buffer
* becomes available after previous aio write request.
*/
- record__aio_sync(map);
- if (perf_mmap__aio_push(map, rec, record__aio_pushfn, &off) != 0) {
+ idx = record__aio_sync(map, false);
+ if (perf_mmap__aio_push(map, rec, idx, record__aio_pushfn, &off) != 0) {
record__aio_set_pos(trace_fd, off);
rc = -1;
goto out;
@@ -1503,6 +1531,13 @@ static int perf_record_config(const char *var, const char *value, void *cb)
var = "call-graph.record-mode";
return perf_default_config(var, value, cb);
}
+#ifdef HAVE_AIO_SUPPORT
+ if (!strcmp(var, "record.aio")) {
+ rec->opts.nr_cblocks = strtol(value, NULL, 0);
+ if (!rec->opts.nr_cblocks)
+ rec->opts.nr_cblocks = nr_cblocks_default;
+ }
+#endif
return 0;
}
@@ -1909,8 +1944,8 @@ static struct option __record_options[] = {
OPT_BOOLEAN(0, "dry-run", &dry_run,
"Parse options then exit"),
#ifdef HAVE_AIO_SUPPORT
- OPT_CALLBACK_NOOPT(0, "aio", &record.opts,
- NULL, "Enable asynchronous trace writing mode",
+ OPT_CALLBACK_OPTARG(0, "aio", &record.opts,
+ &nr_cblocks_default, "n", "Use <n> control blocks in asynchronous trace writing mode (default: 1, max: 4)",
record__aio_parse),
#endif
OPT_END()
@@ -2105,6 +2140,8 @@ int cmd_record(int argc, const char **argv)
goto out;
}
+ if (rec->opts.nr_cblocks > nr_cblocks_max)
+ rec->opts.nr_cblocks = nr_cblocks_max;
if (verbose > 0)
pr_info("nr_cblocks: %d\n", rec->opts.nr_cblocks);