perf report: Allow specifying event to be used as sort key in --group output (429a5f9d) · Commits · 戴 / test

When performing "perf report --group", it shows the event group information together. By default, the output is sorted by the first event in group. It would be nice for user to select any event for sorting. This patch introduces a new option "--group-sort-idx" to sort the output by the event at the index n in event group. For example, Before: # perf report --group --stdio # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 12K of events 'cpu/instructions,period=2000003/, cpu/cpu-cycles,period=200003/, BR_MISP_RETIRED.ALL_BRANCHES:pp, cpu/event=0xc0,umask=1,cmask=1, # Event count (approx.): 6451235635 # # Overhead Command Shared Object Symbol # ................................ ......... ....................... ................................... # 92.19% 98.68% 0.00% 93.30% mgen mgen [.] LOOP1 3.12% 0.29% 0.00% 0.16% gsd-color libglib-2.0.so.0.5600.4 [.] 0x0000000000049515 1.56% 0.03% 0.00% 0.04% gsd-color libglib-2.0.so.0.5600.4 [.] 0x00000000000494b7 1.56% 0.01% 0.00% 0.00% gsd-color libglib-2.0.so.0.5600.4 [.] 0x00000000000494ce 1.56% 0.00% 0.00% 0.00% mgen [kernel.kallsyms] [k] task_tick_fair 0.00% 0.15% 0.00% 0.04% perf [kernel.kallsyms] [k] smp_call_function_single 0.00% 0.13% 0.00% 6.08% swapper [kernel.kallsyms] [k] intel_idle 0.00% 0.03% 0.00% 0.00% gsd-color libglib-2.0.so.0.5600.4 [.] g_main_context_check 0.00% 0.03% 0.00% 0.00% swapper [kernel.kallsyms] [k] apic_timer_interrupt ... After: # perf report --group --stdio --group-sort-idx 3 # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 12K of events 'cpu/instructions,period=2000003/, cpu/cpu-cycles,period=200003/, BR_MISP_RETIRED.ALL_BRANCHES:pp, cpu/event=0xc0,umask=1,cmask=1, # Event count (approx.): 6451235635 # # Overhead Command Shared Object Symbol # ................................ ......... ....................... ................................... # 92.19% 98.68% 0.00% 93.30% mgen mgen [.] LOOP1 0.00% 0.13% 0.00% 6.08% swapper [kernel.kallsyms] [k] intel_idle 3.12% 0.29% 0.00% 0.16% gsd-color libglib-2.0.so.0.5600.4 [.] 0x0000000000049515 0.00% 0.00% 0.00% 0.06% swapper [kernel.kallsyms] [k] hrtimer_start_range_ns 1.56% 0.03% 0.00% 0.04% gsd-color libglib-2.0.so.0.5600.4 [.] 0x00000000000494b7 0.00% 0.15% 0.00% 0.04% perf [kernel.kallsyms] [k] smp_call_function_single 0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] update_curr 0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] apic_timer_interrupt 0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] native_apic_msr_eoi_write 0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] __update_load_avg_se 0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] scheduler_tick Now the output is sorted by the fourth event in group. v7: --- Rebase to latest perf/core, no other change. v4: --- 1. Update Documentation/perf-report.txt to mention '--group-sort-idx' support multiple groups with different amount of events and it should be used on grouped events. 2. Update __hpp__group_sort_idx(), just return when the idx is out of limit. 3. Return failure on symbol_conf.group_sort_idx && !session->evlist->nr_groups. So now we don't need to use together with --group. v3: --- Refine the code in __hpp__group_sort_idx(). Before: for (i = 1; i < nr_members; i++) { if (i == idx) { ret = field_cmp(fields_a[i], fields_b[i]); if (ret) goto out; } } After: if (idx >= 1 && idx < nr_members) { ret = field_cmp(fields_a[idx], fields_b[idx]); if (ret) goto out; } Signed-off-by:

Jin Yao <yao.jin@linux.intel.com> Tested-by:

Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by:

Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200220013616.19916-2-yao.jin@linux.intel.com [ Renamed pair_fields_alloc() to hist_entry__new_pair() and combined decl + assignment of vars ] Signed-off-by:

Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Documentation/perf-report.txt

+5 −0

Original line number	Diff line number	Diff line
		@@ -377,6 +377,11 @@ OPTIONS
		Show event group information together. It forces group output also
		if there are no groups defined in data file.

		--group-sort-idx::
		Sort the output by the event at the index n in group. If n is invalid,
		sort by the first event. It can support multiple groups with different
		amount of events. WARNING: This should be used on grouped events.

		--demangle::
		Demangle symbol names to human readable form. It's enabled by default,
		disable with --no-demangle.

tools/perf/builtin-report.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -1227,6 +1227,10 @@ int cmd_report(int argc, const char **argv)
		"Show a column with the sum of periods"),
		OPT_BOOLEAN_SET(0, "group", &symbol_conf.event_group, &report.group_set,
		"Show event group information together"),
		OPT_INTEGER(0, "group-sort-idx", &symbol_conf.group_sort_idx,
		"Sort the output by the event at the index n in group. "
		"If n is invalid, sort by the first event. "
		"WARNING: should be used on grouped events."),
		OPT_CALLBACK_NOOPT('b', "branch-stack", &branch_mode, "",
		"use branch records for per branch histogram filling",
		parse_branch_mode),
		@@ -1369,6 +1373,12 @@ repeat:

		setup_forced_leader(&report, session->evlist);

		if (symbol_conf.group_sort_idx && !session->evlist->nr_groups) {
		parse_options_usage(NULL, options, "group-sort-idx", 0);
		ret = -EINVAL;
		goto error;
		}

		if (itrace_synth_opts.last_branch)
		has_br_stack = true;

tools/perf/ui/hist.c

+78 −15

Original line number	Diff line number	Diff line
		@@ -151,15 +151,90 @@ static int field_cmp(u64 field_a, u64 field_b)
		return 0;
		}

		static int hist_entry__new_pair(struct hist_entry a, struct hist_entry b,
		hpp_field_fn get_field, int nr_members,
		u64 fields_a, u64 fields_b)
		{
		u64 fa = calloc(nr_members, sizeof(fa)),
		fb = calloc(nr_members, sizeof(fb));
		struct hist_entry *pair;

		if (!fa \|\| !fb)
		goto out_free;

		list_for_each_entry(pair, &a->pairs.head, pairs.node) {
		struct evsel *evsel = hists_to_evsel(pair->hists);
		fa[perf_evsel__group_idx(evsel)] = get_field(pair);
		}

		list_for_each_entry(pair, &b->pairs.head, pairs.node) {
		struct evsel *evsel = hists_to_evsel(pair->hists);
		fb[perf_evsel__group_idx(evsel)] = get_field(pair);
		}

		*fields_a = fa;
		*fields_b = fb;
		return 0;
		out_free:
		free(fa);
		free(fb);
		fields_a = fields_b = NULL;
		return -1;
		}

		static int __hpp__group_sort_idx(struct hist_entry a, struct hist_entry b,
		hpp_field_fn get_field, int idx)
		{
		struct evsel *evsel = hists_to_evsel(a->hists);
		u64 fields_a, fields_b;
		int cmp, nr_members, ret, i;

		cmp = field_cmp(get_field(a), get_field(b));
		if (!perf_evsel__is_group_event(evsel))
		return cmp;

		nr_members = evsel->core.nr_members;
		if (idx < 1 \|\| idx >= nr_members)
		return cmp;

		ret = hist_entry__new_pair(a, b, get_field, nr_members, &fields_a, &fields_b);
		if (ret) {
		ret = cmp;
		goto out;
		}

		ret = field_cmp(fields_a[idx], fields_b[idx]);
		if (ret)
		goto out;

		for (i = 1; i < nr_members; i++) {
		if (i != idx) {
		ret = field_cmp(fields_a[i], fields_b[i]);
		if (ret)
		goto out;
		}
		}

		out:
		free(fields_a);
		free(fields_b);

		return ret;
		}

		static int __hpp__sort(struct hist_entry a, struct hist_entry b,
		hpp_field_fn get_field)
		{
		s64 ret;
		int i, nr_members;
		struct evsel *evsel;
		struct hist_entry *pair;
		u64 fields_a, fields_b;

		if (symbol_conf.group_sort_idx && symbol_conf.event_group) {
		return __hpp__group_sort_idx(a, b, get_field,
		symbol_conf.group_sort_idx);
		}

		ret = field_cmp(get_field(a), get_field(b));
		if (ret \|\| !symbol_conf.event_group)
		return ret;
		@@ -169,22 +244,10 @@ static int __hpp__sort(struct hist_entry a, struct hist_entry b,
		return ret;

		nr_members = evsel->core.nr_members;
		fields_a = calloc(nr_members, sizeof(*fields_a));
		fields_b = calloc(nr_members, sizeof(*fields_b));

		if (!fields_a \|\| !fields_b)
		i = hist_entry__new_pair(a, b, get_field, nr_members, &fields_a, &fields_b);
		if (i)
		goto out;

		list_for_each_entry(pair, &a->pairs.head, pairs.node) {
		evsel = hists_to_evsel(pair->hists);
		fields_a[perf_evsel__group_idx(evsel)] = get_field(pair);
		}

		list_for_each_entry(pair, &b->pairs.head, pairs.node) {
		evsel = hists_to_evsel(pair->hists);
		fields_b[perf_evsel__group_idx(evsel)] = get_field(pair);
		}

		for (i = 1; i < nr_members; i++) {
		ret = field_cmp(fields_a[i], fields_b[i]);
		if (ret)

tools/perf/util/symbol_conf.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -73,6 +73,7 @@ struct symbol_conf {
		const char *symfs;
		int res_sample;
		int pad_output_len_dso;
		int group_sort_idx;
		};

		extern struct symbol_conf symbol_conf;

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