From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jiri Olsa Subject: Re: [PATCH 4/4 v3] perf stat: Add transaction flag (-T) support for s390 Date: Tue, 26 Jun 2018 00:11:27 +0200 Message-ID: <20180625221127.GA4181@krava> References: <20180625125856.20262-1-tmricht@linux.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20180625125856.20262-1-tmricht@linux.ibm.com> Sender: linux-kernel-owner@vger.kernel.org To: Thomas Richter Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, acme@kernel.org, brueckner@linux.vnet.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com List-Id: linux-perf-users.vger.kernel.org On Mon, Jun 25, 2018 at 02:58:56PM +0200, Thomas Richter wrote: > 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. > > v2 --> v3: > Introduce new function metricgroup__has_metric() to check for > the existance of a metric named 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 > Signed-off-by: Thomas Richter > Suggested-by: Hendrik Brueckner > Reviewed-by: Hendrik Brueckner > --- > tools/perf/builtin-stat.c | 12 ++++++++++++ > tools/perf/util/metricgroup.c | 23 +++++++++++++++++++++++ > tools/perf/util/metricgroup.h | 1 + > 3 files changed, 36 insertions(+) > > diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c > index a4f662a462c6..e309279e7b04 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 a metric name. > + */ > + if (metricgroup__has_metric("transaction")) { > + struct option opt = { .value = &evsel_list }; > + > + return metricgroup__parse_groups(&opt, "transaction", > + &metric_events); > + } > + this won't apply now.. needs rebase to current Arnaldo's perf/core but other than that and with Andi's comment Acked-by: Jiri Olsa thanks, jirka