From f2af008695e0b54a58b76caecd52af7e6c97fb29 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Mon, 9 Nov 2015 14:45:41 +0900 Subject: [PATCH] perf report: Add callchain value option Now -g/--call-graph option supports how to display callchain values. Possible values are 'percent', 'period' and 'count'. The percent is same as before and it's the default behavior. The period displays the raw period value rather than the percentage. The count displays the number of occurrences. $ perf report --no-children --stdio -g percent ... 39.93% swapper [kernel.vmlinux] [k] intel_idel | ---intel_idle cpuidle_enter_state cpuidle_enter call_cpuidle cpu_startup_entry | |--28.63%-- start_secondary | --11.30%-- rest_init $ perf report --no-children --show-total-period --stdio -g period ... 39.93% 13018705 swapper [kernel.vmlinux] [k] intel_idel | ---intel_idle cpuidle_enter_state cpuidle_enter call_cpuidle cpu_startup_entry | |--9334403-- start_secondary | --3684302-- rest_init $ perf report --no-children --show-nr-samples --stdio -g count ... 39.93% 80 swapper [kernel.vmlinux] [k] intel_idel | ---intel_idle cpuidle_enter_state cpuidle_enter call_cpuidle cpu_startup_entry | |--57-- start_secondary | --23-- rest_init Signed-off-by: Namhyung Kim Acked-by: Brendan Gregg Cc: Andi Kleen Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Kan Liang Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1447047946-1691-6-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-report.txt | 13 +++-- tools/perf/builtin-report.c | 4 +- tools/perf/ui/stdio/hist.c | 10 +++- tools/perf/util/callchain.c | 62 ++++++++++++++++++++---- tools/perf/util/callchain.h | 10 +++- tools/perf/util/util.c | 3 +- 6 files changed, 84 insertions(+), 18 deletions(-) diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index f7d81aac9188..dab99ed2b339 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -170,11 +170,11 @@ OPTIONS Dump raw trace in ASCII. -g:: ---call-graph=:: +--call-graph=:: Display call chains using type, min percent threshold, print limit, - call order, sort key and branch. Note that ordering of parameters is not - fixed so any parement can be given in an arbitraty order. One exception - is the print_limit which should be preceded by threshold. + call order, sort key, optional branch and value. Note that ordering of + parameters is not fixed so any parement can be given in an arbitraty order. + One exception is the print_limit which should be preceded by threshold. print_type can be either: - flat: single column, linear exposure of call chains. @@ -205,6 +205,11 @@ OPTIONS - branch: include last branch information in callgraph when available. Usually more convenient to use --branch-history for this. + value can be: + - percent: diplay overhead percent (default) + - period: display event period + - count: display event count + --children:: Accumulate callchain of children to parent entry so that then can show up in the output. The output will have a new "Children" column diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index f256fac1e722..14428342b47b 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -625,7 +625,7 @@ parse_percent_limit(const struct option *opt, const char *str, return 0; } -#define CALLCHAIN_DEFAULT_OPT "graph,0.5,caller,function" +#define CALLCHAIN_DEFAULT_OPT "graph,0.5,caller,function,percent" const char report_callchain_help[] = "Display call graph (stack chain/backtrace):\n\n" CALLCHAIN_REPORT_HELP @@ -708,7 +708,7 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused) OPT_BOOLEAN('x', "exclude-other", &symbol_conf.exclude_other, "Only display entries with parent-match"), OPT_CALLBACK_DEFAULT('g', "call-graph", &report, - "print_type,threshold[,print_limit],order,sort_key[,branch]", + "print_type,threshold[,print_limit],order,sort_key[,branch],value", report_callchain_help, &report_parse_callchain_opt, callchain_default_opt), OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain, diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c index f4de055cab9b..7ebc661be267 100644 --- a/tools/perf/ui/stdio/hist.c +++ b/tools/perf/ui/stdio/hist.c @@ -81,13 +81,14 @@ static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root, int depth_mask, int left_margin) { struct rb_node *node, *next; - struct callchain_node *child; + struct callchain_node *child = NULL; struct callchain_list *chain; int new_depth_mask = depth_mask; u64 remaining; size_t ret = 0; int i; uint entries_printed = 0; + int cumul_count = 0; remaining = total_samples; @@ -99,6 +100,7 @@ static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root, child = rb_entry(node, struct callchain_node, rb_node); cumul = callchain_cumul_hits(child); remaining -= cumul; + cumul_count += callchain_cumul_counts(child); /* * The depth mask manages the output of pipes that show @@ -148,6 +150,12 @@ static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root, if (!rem_sq_bracket) return ret; + if (callchain_param.value == CCVAL_COUNT && child && child->parent) { + rem_node.count = child->parent->children_count - cumul_count; + if (rem_node.count <= 0) + return ret; + } + new_depth_mask &= ~(1 << (depth - 1)); ret += ipchain__fprintf_graph(fp, &rem_node, &rem_hits, depth, new_depth_mask, 0, total_samples, diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c index e390edd31504..717c58c1da58 100644 --- a/tools/perf/util/callchain.c +++ b/tools/perf/util/callchain.c @@ -83,6 +83,23 @@ static int parse_callchain_sort_key(const char *value) return -1; } +static int parse_callchain_value(const char *value) +{ + if (!strncmp(value, "percent", strlen(value))) { + callchain_param.value = CCVAL_PERCENT; + return 0; + } + if (!strncmp(value, "period", strlen(value))) { + callchain_param.value = CCVAL_PERIOD; + return 0; + } + if (!strncmp(value, "count", strlen(value))) { + callchain_param.value = CCVAL_COUNT; + return 0; + } + return -1; +} + static int __parse_callchain_report_opt(const char *arg, bool allow_record_opt) { @@ -106,7 +123,8 @@ __parse_callchain_report_opt(const char *arg, bool allow_record_opt) if (!parse_callchain_mode(tok) || !parse_callchain_order(tok) || - !parse_callchain_sort_key(tok)) { + !parse_callchain_sort_key(tok) || + !parse_callchain_value(tok)) { /* parsing ok - move on to the next */ try_stack_size = false; goto next; @@ -820,13 +838,27 @@ char *callchain_node__scnprintf_value(struct callchain_node *node, { double percent = 0.0; u64 period = callchain_cumul_hits(node); + unsigned count = callchain_cumul_counts(node); - if (callchain_param.mode == CHAIN_FOLDED) + if (callchain_param.mode == CHAIN_FOLDED) { period = node->hit; - if (total) - percent = period * 100.0 / total; + count = node->count; + } - scnprintf(bf, bfsize, "%.2f%%", percent); + switch (callchain_param.value) { + case CCVAL_PERIOD: + scnprintf(bf, bfsize, "%"PRIu64, period); + break; + case CCVAL_COUNT: + scnprintf(bf, bfsize, "%u", count); + break; + case CCVAL_PERCENT: + default: + if (total) + percent = period * 100.0 / total; + scnprintf(bf, bfsize, "%.2f%%", percent); + break; + } return bf; } @@ -835,13 +867,25 @@ int callchain_node__fprintf_value(struct callchain_node *node, { double percent = 0.0; u64 period = callchain_cumul_hits(node); + unsigned count = callchain_cumul_counts(node); - if (callchain_param.mode == CHAIN_FOLDED) + if (callchain_param.mode == CHAIN_FOLDED) { period = node->hit; - if (total) - percent = period * 100.0 / total; + count = node->count; + } - return percent_color_fprintf(fp, "%.2f%%", percent); + switch (callchain_param.value) { + case CCVAL_PERIOD: + return fprintf(fp, "%"PRIu64, period); + case CCVAL_COUNT: + return fprintf(fp, "%u", count); + case CCVAL_PERCENT: + default: + if (total) + percent = period * 100.0 / total; + return percent_color_fprintf(fp, "%.2f%%", percent); + } + return 0; } static void free_callchain_node(struct callchain_node *node) diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h index cdb386d9ba02..47bc0c57f764 100644 --- a/tools/perf/util/callchain.h +++ b/tools/perf/util/callchain.h @@ -29,7 +29,8 @@ HELP_PAD "print_limit:\tmaximum number of call graph entry ()\n" \ HELP_PAD "order:\t\tcall graph order (caller|callee)\n" \ HELP_PAD "sort_key:\tcall graph sort key (function|address)\n" \ - HELP_PAD "branch:\t\tinclude last branch info to call graph (branch)\n" + HELP_PAD "branch:\t\tinclude last branch info to call graph (branch)\n" \ + HELP_PAD "value:\t\tcall graph value (percent|period|count)\n" enum perf_call_graph_mode { CALLCHAIN_NONE, @@ -81,6 +82,12 @@ enum chain_key { CCKEY_ADDRESS }; +enum chain_value { + CCVAL_PERCENT, + CCVAL_PERIOD, + CCVAL_COUNT, +}; + struct callchain_param { bool enabled; enum perf_call_graph_mode record_mode; @@ -93,6 +100,7 @@ struct callchain_param { bool order_set; enum chain_key key; bool branch_callstack; + enum chain_value value; }; extern struct callchain_param callchain_param; diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c index 47b1e36c7ea0..75759aebc7b8 100644 --- a/tools/perf/util/util.c +++ b/tools/perf/util/util.c @@ -21,7 +21,8 @@ struct callchain_param callchain_param = { .mode = CHAIN_GRAPH_ABS, .min_percent = 0.5, .order = ORDER_CALLEE, - .key = CCKEY_FUNCTION + .key = CCKEY_FUNCTION, + .value = CCVAL_PERCENT, }; /* -- 2.20.1