perf stat: Add transaction flag (-T) support for s390
The '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 dependent JSON files. This requires a metric
named "transaction" in the JSON files for the platform.
Introduce a new function metricgroup__has_metric() to check for the
existence of a metric_name transaction.
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 <ak@linux.intel.com>
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Link: http://lkml.kernel.org/r/20180626071701.58190-1-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 files changed