Adding interface to enable/disable single event in the evlist based on its name. It will be used later in new control enable/disable interface.
Keeping the evlist::enabled true when one or more events are enabled so the toggle can work properly and toggle evlist to disabled state. Acked-by: Namhyung Kim <[email protected]> Acked-by: Alexei Budankov <[email protected]> Signed-off-by: Jiri Olsa <[email protected]> --- tools/perf/util/evlist.c | 69 ++++++++++++++++++++++++++++++++++++++-- tools/perf/util/evlist.h | 2 ++ 2 files changed, 68 insertions(+), 3 deletions(-) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 493819173a8e..70aff26612a9 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -370,7 +370,30 @@ bool evsel__cpu_iter_skip(struct evsel *ev, int cpu) return true; } -void evlist__disable(struct evlist *evlist) +static int evsel__strcmp(struct evsel *pos, char *evsel_name) +{ + if (!evsel_name) + return 0; + if (evsel__is_dummy_event(pos)) + return 1; + return strcmp(pos->name, evsel_name); +} + +static int evlist__is_enabled(struct evlist *evlist) +{ + struct evsel *pos; + + evlist__for_each_entry(evlist, pos) { + if (!evsel__is_group_leader(pos) || !pos->core.fd) + continue; + /* If at least one event is enabled, evlist is enabled. */ + if (!pos->disabled) + return true; + } + return false; +} + +static void __evlist__disable(struct evlist *evlist, char *evsel_name) { struct evsel *pos; struct affinity affinity; @@ -386,6 +409,8 @@ void evlist__disable(struct evlist *evlist) affinity__set(&affinity, cpu); evlist__for_each_entry(evlist, pos) { + if (evsel__strcmp(pos, evsel_name)) + continue; if (evsel__cpu_iter_skip(pos, cpu)) continue; if (pos->disabled || !evsel__is_group_leader(pos) || !pos->core.fd) @@ -403,15 +428,34 @@ void evlist__disable(struct evlist *evlist) affinity__cleanup(&affinity); evlist__for_each_entry(evlist, pos) { + if (evsel__strcmp(pos, evsel_name)) + continue; if (!evsel__is_group_leader(pos) || !pos->core.fd) continue; pos->disabled = true; } - evlist->enabled = false; + /* + * If we disabled only single event, we need to check + * the enabled state of the evlist manually. + */ + if (evsel_name) + evlist->enabled = evlist__is_enabled(evlist); + else + evlist->enabled = false; +} + +void evlist__disable(struct evlist *evlist) +{ + __evlist__disable(evlist, NULL); +} + +void evlist__disable_evsel(struct evlist *evlist, char *evsel_name) +{ + __evlist__disable(evlist, evsel_name); } -void evlist__enable(struct evlist *evlist) +static void __evlist__enable(struct evlist *evlist, char *evsel_name) { struct evsel *pos; struct affinity affinity; @@ -424,6 +468,8 @@ void evlist__enable(struct evlist *evlist) affinity__set(&affinity, cpu); evlist__for_each_entry(evlist, pos) { + if (evsel__strcmp(pos, evsel_name)) + continue; if (evsel__cpu_iter_skip(pos, cpu)) continue; if (!evsel__is_group_leader(pos) || !pos->core.fd) @@ -433,14 +479,31 @@ void evlist__enable(struct evlist *evlist) } affinity__cleanup(&affinity); evlist__for_each_entry(evlist, pos) { + if (evsel__strcmp(pos, evsel_name)) + continue; if (!evsel__is_group_leader(pos) || !pos->core.fd) continue; pos->disabled = false; } + /* + * Even single event sets the 'enabled' for evlist, + * so the toggle can work properly and toggle to + * 'disabled' state. + */ evlist->enabled = true; } +void evlist__enable(struct evlist *evlist) +{ + __evlist__enable(evlist, NULL); +} + +void evlist__enable_evsel(struct evlist *evlist, char *evsel_name) +{ + __evlist__enable(evlist, evsel_name); +} + void evlist__toggle_enable(struct evlist *evlist) { (evlist->enabled ? evlist__disable : evlist__enable)(evlist); diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h index 9b0c795736bb..1aae75895dea 100644 --- a/tools/perf/util/evlist.h +++ b/tools/perf/util/evlist.h @@ -186,6 +186,8 @@ size_t evlist__mmap_size(unsigned long pages); void evlist__disable(struct evlist *evlist); void evlist__enable(struct evlist *evlist); void evlist__toggle_enable(struct evlist *evlist); +void evlist__disable_evsel(struct evlist *evlist, char *evsel_name); +void evlist__enable_evsel(struct evlist *evlist, char *evsel_name); int evlist__enable_event_idx(struct evlist *evlist, struct evsel *evsel, int idx); -- 2.26.2
