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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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perf hists: Check if a hist_entry has callchains before using them
So far if we use 'perf record -g' this will make symbol_conf.use_callchain 'true' and logic will assume that all events have callchains enabled, but ever since we added the possibility of setting up callchains for some events (e.g.: -e cycles/call-graph=dwarf/) while not for others, we limit usage scenarios by looking at that symbol_conf.use_callchain global boolean, we better look at each event attributes. On the road to that we need to look if a hist_entry has callchains, that is, to go from hist_entry->hists to the evsel that contains it, to then look at evsel->sample_type for PERF_SAMPLE_CALLCHAIN. The next step is to add a symbol_conf.ignore_callchains global, to use in the places where what we really want to know is if callchains should be ignored, even if present. Then -g will mean just to select a callchain mode to be applied to all events not explicitely setting some other callchain mode, i.e. a default callchain mode, and --no-call-graph will set symbol_conf.ignore_callchains with that clear intention. That too will at some point become a per evsel thing, that tools can set for all or just a few of its evsels. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-0sas5cm4dsw2obn75g7ruz69@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
parent
0b5d6ece5e
commit
fabd37b837
7 changed files with 25 additions and 17 deletions
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@ -1231,6 +1231,7 @@ static int hist_browser__show_entry(struct hist_browser *browser,
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int width = browser->b.width;
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char folded_sign = ' ';
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bool current_entry = ui_browser__is_current_entry(&browser->b, row);
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bool use_callchain = hist_entry__has_callchains(entry) && symbol_conf.use_callchain;
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off_t row_offset = entry->row_offset;
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bool first = true;
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struct perf_hpp_fmt *fmt;
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@ -1240,7 +1241,7 @@ static int hist_browser__show_entry(struct hist_browser *browser,
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browser->selection = &entry->ms;
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}
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if (symbol_conf.use_callchain) {
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if (use_callchain) {
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hist_entry__init_have_children(entry);
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folded_sign = hist_entry__folded(entry);
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}
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@ -1276,7 +1277,7 @@ static int hist_browser__show_entry(struct hist_browser *browser,
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}
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if (first) {
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if (symbol_conf.use_callchain) {
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if (use_callchain) {
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ui_browser__printf(&browser->b, "%c ", folded_sign);
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width -= 2;
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}
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@ -1583,7 +1584,7 @@ hists_browser__scnprintf_headers(struct hist_browser *browser, char *buf,
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int column = 0;
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int span = 0;
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if (symbol_conf.use_callchain) {
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if (hists__has_callchains(hists) && symbol_conf.use_callchain) {
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ret = scnprintf(buf, size, " ");
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if (advance_hpp_check(&dummy_hpp, ret))
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return ret;
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@ -1987,7 +1988,7 @@ static int hist_browser__fprintf_entry(struct hist_browser *browser,
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bool first = true;
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int ret;
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if (symbol_conf.use_callchain) {
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if (hist_entry__has_callchains(he) && symbol_conf.use_callchain) {
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folded_sign = hist_entry__folded(he);
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printed += fprintf(fp, "%c ", folded_sign);
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}
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@ -2671,7 +2672,7 @@ static void hist_browser__update_percent_limit(struct hist_browser *hb,
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he->nr_rows = 0;
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}
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if (!he->leaf || !symbol_conf.use_callchain)
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if (!he->leaf || !hist_entry__has_callchains(he) || !symbol_conf.use_callchain)
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goto next;
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if (callchain_param.mode == CHAIN_GRAPH_REL) {
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@ -382,7 +382,8 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists,
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gtk_tree_store_set(store, &iter, col_idx++, s, -1);
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}
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if (symbol_conf.use_callchain && hists__has(hists, sym)) {
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if (hists__has_callchains(hists) &&
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symbol_conf.use_callchain && hists__has(hists, sym)) {
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if (callchain_param.mode == CHAIN_GRAPH_REL)
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total = symbol_conf.cumulate_callchain ?
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h->stat_acc->period : h->stat.period;
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@ -479,7 +480,7 @@ static void perf_gtk__add_hierarchy_entries(struct hists *hists,
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}
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}
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if (symbol_conf.use_callchain && he->leaf) {
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if (he->leaf && hist_entry__has_callchains(he) && symbol_conf.use_callchain) {
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if (callchain_param.mode == CHAIN_GRAPH_REL)
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total = symbol_conf.cumulate_callchain ?
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he->stat_acc->period : he->stat.period;
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@ -207,7 +207,7 @@ static int __hpp__sort_acc(struct hist_entry *a, struct hist_entry *b,
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if (ret)
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return ret;
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if (a->thread != b->thread || !symbol_conf.use_callchain)
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if (a->thread != b->thread || !hist_entry__has_callchains(a) || !symbol_conf.use_callchain)
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return 0;
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ret = b->callchain->max_depth - a->callchain->max_depth;
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@ -516,7 +516,7 @@ static int hist_entry__hierarchy_fprintf(struct hist_entry *he,
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}
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printed += putc('\n', fp);
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if (symbol_conf.use_callchain && he->leaf) {
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if (he->leaf && hist_entry__has_callchains(he) && symbol_conf.use_callchain) {
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u64 total = hists__total_period(hists);
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printed += hist_entry_callchain__fprintf(he, total, 0, fp);
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@ -550,7 +550,7 @@ static int hist_entry__fprintf(struct hist_entry *he, size_t size,
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ret = fprintf(fp, "%s\n", bf);
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if (use_callchain)
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if (hist_entry__has_callchains(he) && use_callchain)
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callchain_ret = hist_entry_callchain__fprintf(he, total_period,
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0, fp);
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@ -410,7 +410,7 @@ static int hist_entry__init(struct hist_entry *he,
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map__get(he->mem_info->daddr.map);
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}
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if (symbol_conf.use_callchain)
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if (hist_entry__has_callchains(he) && symbol_conf.use_callchain)
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callchain_init(he->callchain);
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if (he->raw_data) {
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@ -492,7 +492,7 @@ static u8 symbol__parent_filter(const struct symbol *parent)
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static void hist_entry__add_callchain_period(struct hist_entry *he, u64 period)
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{
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if (!symbol_conf.use_callchain)
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if (!hist_entry__has_callchains(he) || !symbol_conf.use_callchain)
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return;
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he->hists->callchain_period += period;
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@ -986,7 +986,7 @@ iter_add_next_cumulative_entry(struct hist_entry_iter *iter,
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iter->he = he;
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he_cache[iter->curr++] = he;
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if (symbol_conf.use_callchain)
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if (hist_entry__has_callchains(he) && symbol_conf.use_callchain)
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callchain_append(he->callchain, &cursor, sample->period);
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return 0;
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}
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@ -1373,7 +1373,8 @@ static int hists__hierarchy_insert_entry(struct hists *hists,
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if (new_he) {
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new_he->leaf = true;
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if (symbol_conf.use_callchain) {
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if (hist_entry__has_callchains(new_he) &&
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symbol_conf.use_callchain) {
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callchain_cursor_reset(&callchain_cursor);
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if (callchain_merge(&callchain_cursor,
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new_he->callchain,
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@ -1414,7 +1415,7 @@ static int hists__collapse_insert_entry(struct hists *hists,
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if (symbol_conf.cumulate_callchain)
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he_stat__add_stat(iter->stat_acc, he->stat_acc);
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if (symbol_conf.use_callchain) {
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if (hist_entry__has_callchains(he) && symbol_conf.use_callchain) {
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callchain_cursor_reset(&callchain_cursor);
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if (callchain_merge(&callchain_cursor,
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iter->callchain,
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@ -220,6 +220,12 @@ static inline struct hists *evsel__hists(struct perf_evsel *evsel)
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return &hevsel->hists;
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}
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static __pure inline bool hists__has_callchains(struct hists *hists)
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{
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const struct perf_evsel *evsel = hists_to_evsel(hists);
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return evsel__has_callchain(evsel);
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}
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int hists__init(void);
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int __hists__init(struct hists *hists, struct perf_hpp_list *hpp_list);
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@ -153,8 +153,7 @@ struct hist_entry {
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static __pure inline bool hist_entry__has_callchains(struct hist_entry *he)
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{
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const struct perf_evsel *evsel = hists_to_evsel(he->hists);
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return evsel__has_callchain(evsel);
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return hists__has_callchains(he->hists);
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}
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static inline bool hist_entry__has_pairs(struct hist_entry *he)
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