perf stat command line flag -T to display transaction counters is
currently supported for x86 only.
Add support for s390. It is based on the metrics flag -M transaction
using the architecture dependend json files This requires a metric
named transaction in the json files for the platform.
As suggested by Andi Kleen, this is the new approach to support
transactions counters. Other architectures will follow.
Output before:
[root@p23lp27 perf]# ./perf stat -T -- sleep 1
Cannot set up transaction events
[root@p23lp27 perf]#
Output after:
[root@s35lp76 perf]# ./perf stat -T -- ~/mytesttx 1 >/tmp/111
Performance counter stats for '/root/mytesttx 1':
1 tx_c_tend # 13.0 transaction
1 tx_nc_tend
11 tx_nc_tabort
0 tx_c_tabort_special
0 tx_c_tabort_no_special
0.001070109 seconds time elapsed
[root@s35lp76 perf]#
Suggested-by: Andi Kleen <[email protected]>
Signed-off-by: Thomas Richter <[email protected]>
Reviewed-by: Hendrik Brueckner <[email protected]>
---
tools/perf/builtin-stat.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index a4f662a462c6..c8e2c5a1692f 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -2425,6 +2425,18 @@ static int add_default_attributes(void)
if (transaction_run) {
struct parse_events_error errinfo;
+ /* Handle -T as -M transaction. Once platform specific metrics
+ * support has been added to the json files, all archictures
+ * will use this approach. To determine transaction support
+ * on an architecture test for such an alias.
+ */
+ if (pmu_have_event("cpum_cf", "TX_NC_TEND")) {
+ struct option opt = { .value = &evsel_list };
+
+ return metricgroup__parse_groups(&opt, "transaction",
+ &metric_events);
+ }
+
if (pmu_have_event("cpu", "cycles-ct") &&
pmu_have_event("cpu", "el-start"))
err = parse_events(evsel_list, transaction_attrs,
--
2.14.3