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Clarke" , Arnaldo Carvalho de Melo , Riccardo Mancini , Kan Liang , Peter Zijlstra , Ingo Molnar , Mark Rutland , Alexander Shishkin , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Cc: eranian@google.com References: <20211113071548.372572-1-irogers@google.com> From: kajoljain Message-ID: <6e1252c4-2637-921c-659f-f322eb84623a@linux.ibm.com> Date: Wed, 17 Nov 2021 19:45:14 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 MIME-Version: 1.0 In-Reply-To: <20211113071548.372572-1-irogers@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: lDT2A1GaTw36DJOcwVPKqCzW7NeQQllv X-Proofpoint-GUID: 81QU8aK80wJOvOrqOGiKCFDEXWQG6DuC X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.0.607.475 definitions=2021-11-17_05,2021-11-17_01,2020-04-07_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 malwarescore=0 bulkscore=0 impostorscore=0 adultscore=0 suspectscore=0 phishscore=0 clxscore=1015 spamscore=0 mlxlogscore=999 priorityscore=1501 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2111170072 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Patch looks good to me. Reviewed-by: Kajol Jain Thanks, Kajol Jain On 11/13/21 12:45 PM, Ian Rogers wrote: > The leader of a group is the first, but allow it to be an arbitrary > list member so that for Intel topdown events slots may always be the > group leader. > > Signed-off-by: Ian Rogers > --- > tools/lib/perf/evlist.c | 15 +++++++++------ > tools/lib/perf/include/internal/evlist.h | 2 +- > tools/perf/util/parse-events.c | 2 +- > 3 files changed, 11 insertions(+), 8 deletions(-) > > diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c > index e37dfad31383..974da341b8b0 100644 > --- a/tools/lib/perf/evlist.c > +++ b/tools/lib/perf/evlist.c > @@ -643,14 +643,14 @@ perf_evlist__next_mmap(struct perf_evlist *evlist, struct perf_mmap *map, > return overwrite ? evlist->mmap_ovw_first : evlist->mmap_first; > } > > -void __perf_evlist__set_leader(struct list_head *list) > +void __perf_evlist__set_leader(struct list_head *list, struct perf_evsel *leader) > { > - struct perf_evsel *evsel, *leader; > + struct perf_evsel *first, *last, *evsel; > > - leader = list_entry(list->next, struct perf_evsel, node); > - evsel = list_entry(list->prev, struct perf_evsel, node); > + first = list_entry(list->next, struct perf_evsel, node); > + last = list_entry(list->prev, struct perf_evsel, node); > > - leader->nr_members = evsel->idx - leader->idx + 1; > + leader->nr_members = last->idx - first->idx + 1; > > __perf_evlist__for_each_entry(list, evsel) > evsel->leader = leader; > @@ -659,7 +659,10 @@ void __perf_evlist__set_leader(struct list_head *list) > void perf_evlist__set_leader(struct perf_evlist *evlist) > { > if (evlist->nr_entries) { > + struct perf_evsel *first = list_entry(evlist->entries.next, > + struct perf_evsel, node); > + > evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; > - __perf_evlist__set_leader(&evlist->entries); > + __perf_evlist__set_leader(&evlist->entries, first); > } > } > diff --git a/tools/lib/perf/include/internal/evlist.h b/tools/lib/perf/include/internal/evlist.h > index f366dbad6a88..6f74269a3ad4 100644 > --- a/tools/lib/perf/include/internal/evlist.h > +++ b/tools/lib/perf/include/internal/evlist.h > @@ -127,5 +127,5 @@ int perf_evlist__id_add_fd(struct perf_evlist *evlist, > > void perf_evlist__reset_id_hash(struct perf_evlist *evlist); > > -void __perf_evlist__set_leader(struct list_head *list); > +void __perf_evlist__set_leader(struct list_head *list, struct perf_evsel *leader); > #endif /* __LIBPERF_INTERNAL_EVLIST_H */ > diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c > index 5bfb6f892489..6308ba739d19 100644 > --- a/tools/perf/util/parse-events.c > +++ b/tools/perf/util/parse-events.c > @@ -1834,8 +1834,8 @@ void parse_events__set_leader(char *name, struct list_head *list, > if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state)) > return; > > - __perf_evlist__set_leader(list); > leader = list_entry(list->next, struct evsel, core.node); > + __perf_evlist__set_leader(list, &leader->core); > leader->group_name = name ? strdup(name) : NULL; > } > >