diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/Documentation/perf-report.txt | 7 | ||||
| -rw-r--r-- | tools/perf/builtin-report.c | 107 |
2 files changed, 105 insertions, 9 deletions
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index 9b430e9..19b9092 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -153,6 +153,13 @@ OPTIONS information which may be very large and thus may clutter the display. It currently includes: cpu and numa topology of the host system. +-b:: +--branch-stack:: + Use the addresses of sampled taken branches instead of the instruction + address to build the histograms. To generate meaningful output, the + perf.data file must have been obtained using perf record -b xxx where + xxx is a branch filter option. + SEE ALSO -------- linkperf:perf-stat[1], linkperf:perf-annotate[1] diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index 25d34d4..528789f 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -53,6 +53,50 @@ struct perf_report { DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS); }; +static int perf_report__add_branch_hist_entry(struct perf_tool *tool, + struct addr_location *al, + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine) +{ + struct perf_report *rep = container_of(tool, struct perf_report, tool); + struct symbol *parent = NULL; + int err = 0; + unsigned i; + struct hist_entry *he; + struct branch_info *bi; + + if ((sort__has_parent || symbol_conf.use_callchain) + && sample->callchain) { + err = machine__resolve_callchain(machine, evsel, al->thread, + sample->callchain, &parent); + if (err) + return err; + } + + bi = machine__resolve_bstack(machine, al->thread, + sample->branch_stack); + if (!bi) + return -ENOMEM; + + for (i = 0; i < sample->branch_stack->nr; i++) { + if (rep->hide_unresolved && !(bi[i].from.sym && bi[i].to.sym)) + continue; + /* + * The report shows the percentage of total branches captured + * and not events sampled. Thus we use a pseudo period of 1. + */ + he = __hists__add_branch_entry(&evsel->hists, al, parent, + &bi[i], 1); + if (he) { + evsel->hists.stats.total_period += 1; + hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE); + } else + return -ENOMEM; + } + return err; +} + static int perf_evsel__add_hist_entry(struct perf_evsel *evsel, struct addr_location *al, struct perf_sample *sample, @@ -126,14 +170,21 @@ static int process_sample_event(struct perf_tool *tool, if (rep->cpu_list && !test_bit(sample->cpu, rep->cpu_bitmap)) return 0; - if (al.map != NULL) - al.map->dso->hit = 1; + if (sort__branch_mode) { + if (perf_report__add_branch_hist_entry(tool, &al, sample, + evsel, machine)) { + pr_debug("problem adding lbr entry, skipping event\n"); + return -1; + } + } else { + if (al.map != NULL) + al.map->dso->hit = 1; - if (perf_evsel__add_hist_entry(evsel, &al, sample, machine)) { - pr_debug("problem incrementing symbol period, skipping event\n"); - return -1; + if (perf_evsel__add_hist_entry(evsel, &al, sample, machine)) { + pr_debug("problem incrementing symbol period, skipping event\n"); + return -1; + } } - return 0; } @@ -188,6 +239,15 @@ static int perf_report__setup_sample_type(struct perf_report *rep) } } + if (sort__branch_mode) { + if (!(self->sample_type & PERF_SAMPLE_BRANCH_STACK)) { + fprintf(stderr, "selected -b but no branch data." + " Did you call perf record without" + " -b?\n"); + return -1; + } + } + return 0; } @@ -477,7 +537,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __used) OPT_BOOLEAN(0, "stdio", &report.use_stdio, "Use the stdio interface"), OPT_STRING('s', "sort", &sort_order, "key[,key2...]", - "sort by key(s): pid, comm, dso, symbol, parent"), + "sort by key(s): pid, comm, dso, symbol, parent, dso_to," + " dso_from, symbol_to, symbol_from, mispredict"), OPT_BOOLEAN(0, "showcpuutilization", &symbol_conf.show_cpu_utilization, "Show sample percentage for different cpu modes"), OPT_STRING('p', "parent", &parent_pattern, "regex", @@ -517,6 +578,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __used) "Specify disassembler style (e.g. -M intel for intel syntax)"), OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period, "Show a column with the sum of periods"), + OPT_BOOLEAN('b', "branch-stack", &sort__branch_mode, + "use branch records for histogram filling"), OPT_END() }; @@ -537,10 +600,36 @@ int cmd_report(int argc, const char **argv, const char *prefix __used) report.input_name = "perf.data"; } - if (strcmp(report.input_name, "-") != 0) + if (sort__branch_mode) { + if (use_browser) + fprintf(stderr, "Warning: TUI interface not supported" + " in branch mode\n"); + if (symbol_conf.dso_list_str != NULL) + fprintf(stderr, "Warning: dso filtering not supported" + " in branch mode\n"); + if (symbol_conf.sym_list_str != NULL) + fprintf(stderr, "Warning: symbol filtering not" + " supported in branch mode\n"); + + report.use_stdio = true; + use_browser = 0; setup_browser(true); - else + symbol_conf.dso_list_str = NULL; + symbol_conf.sym_list_str = NULL; + + /* + * if no sort_order is provided, then specify branch-mode + * specific order + */ + if (sort_order == default_sort_order) + sort_order = "comm,dso_from,symbol_from," + "dso_to,symbol_to"; + + } else if (strcmp(report.input_name, "-") != 0) { + setup_browser(true); + } else { use_browser = 0; + } /* * Only in the newt browser we are doing integrated annotation, |
