Messages in this thread Patch in this message | | | From | Jiri Olsa <> | Subject | [PATCH 07/12] perf diff: Add ratio computation way to compare hist entries | Date | Thu, 6 Sep 2012 17:47:01 +0200 |
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Adding -c option to select computation method with the current 'Delta' computation as default. Current posible values are of this option are: 'delta' and 'ratio'.
Adding 'ratio' as new computation way to compare hist entries. If specified the 'Ratio' column is displayed with value 'r' computed as:
r = A->period / B->period
with: - A/B being matching hist entry from first/second file specified (or perf.data/perf.data.old) respectively. - period being the hist entry period value
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Jiri Olsa <jolsa@redhat.com> --- tools/perf/Documentation/perf-diff.txt | 33 ++++++++++++++++++++++ tools/perf/builtin-diff.c | 51 +++++++++++++++++++++++++++++++++- tools/perf/ui/stdio/hist.c | 13 +++++++++ tools/perf/util/hist.h | 1 + 4 files changed, 97 insertions(+), 1 deletion(-)
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt index 6ce9585..8fff061 100644 --- a/tools/perf/Documentation/perf-diff.txt +++ b/tools/perf/Documentation/perf-diff.txt @@ -76,6 +76,39 @@ OPTIONS --baseline-only:: Show only items with match in baseline. +-c:: +--compute:: + Differential computation selection - delta,ratio (default is delta). + See COMPARISON METHODS section for more info. + +COMPARISON METHODS +------------------ +delta +~~~~~ +If specified the 'Delta' column is displayed with value 'd' computed as: + + d = A->period_percent - B->period_percent + +with: + - A/B being matching hist entry from first/second file specified + (or perf.data/perf.data.old) respectively. + + - period_percent being the % of the hist entry period value within + single data file + +ratio +~~~~~ +If specified the 'Ratio' column is displayed with value 'r' computed as: + + r = A->period / B->period + +with: + - A/B being matching hist entry from first/second file specified + (or perf.data/perf.data.old) respectively. + + - period being the hist entry period value + + SEE ALSO -------- linkperf:perf-record[1] diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index 46f4a10..cde08d4 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -27,6 +27,39 @@ static bool force; static bool show_displacement; static bool show_baseline_only; +enum { + COMPUTE_DELTA, + COMPUTE_RATIO, + COMPUTE_MAX, +}; + +const char *compute_names[COMPUTE_MAX] = { + [COMPUTE_DELTA] = "delta", + [COMPUTE_RATIO] = "ratio", +}; + +static const char *compute_str; +static int compute; + +static int setup_compute(void) +{ + unsigned i; + + if (!compute_str) { + compute = COMPUTE_DELTA; + return 0; + } + + for (i = 0; i < COMPUTE_MAX; i++) + if (!strcmp(compute_str, compute_names[i])) { + compute = i; + return 0; + } + + pr_err("Failed to find valid compute string\n"); + return -EINVAL; +} + static int hists__add_entry(struct hists *self, struct addr_location *al, u64 period) { @@ -263,6 +296,8 @@ static const struct option options[] = { "Show position displacement relative to baseline"), OPT_BOOLEAN('b', "baseline-only", &show_baseline_only, "Show only items with match in baseline"), + OPT_STRING('c', "compute", &compute_str, "delta,ratio (default delta)", + "Entries differential computation selection"), OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, "dump raw trace in ASCII"), OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), @@ -288,7 +323,18 @@ static void setup_ui_stdio(void) { hists_stdio_column__register_idx(HISTC_BASELINE); hists_stdio_column__register_global(); - hists_stdio_column__register_idx(HISTC_DELTA); + + switch (compute) { + case COMPUTE_DELTA: + hists_stdio_column__register_idx(HISTC_DELTA); + break; + case COMPUTE_RATIO: + hists_stdio_column__register_idx(HISTC_RATIO); + break; + default: + BUG_ON(1); + }; + if (show_displacement) hists_stdio_column__register_idx(HISTC_DISPLACEMENT); } @@ -315,6 +361,9 @@ int cmd_diff(int argc, const char **argv, const char *prefix __used) if (symbol__init() < 0) return -1; + if (setup_compute()) + usage_with_options(diff_usage, options); + setup_sorting(diff_usage, options); setup_ui_stdio(); setup_pager(); diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c index 48fb0b3..02ba1c7 100644 --- a/tools/perf/ui/stdio/hist.c +++ b/tools/perf/ui/stdio/hist.c @@ -31,6 +31,18 @@ hists_stdio_column__delta_snprintf(struct hist_entry *he, char *bf, } static int +hists_stdio_column__ratio_snprintf(struct hist_entry *he, char *bf, + size_t size, unsigned int width __used) +{ + struct hist_entry *pair = he->pair; + double new_period = he->period; + double old_period = pair ? pair->period : 0; + double ratio = pair ? new_period / old_period : 0; + + return percent_color_snprintf(bf, size, "%14.3F", ratio); +} + +static int hists_stdio_column__baseline_snprintf(struct hist_entry *he, char *bf, size_t size, unsigned int width __used) { @@ -124,6 +136,7 @@ DEF_COLUMN(cpu_guest_us, HISTC_CPU_UTILIZATION_GUEST_US, 8, "guest us") DEF_COLUMN(nr_samples, HISTC_NR_SAMPLES, 12, "Samples") DEF_COLUMN(total_period, HISTC_TOTAL_PERIOD, 12, "Period") DEF_COLUMN(delta, HISTC_DELTA, 8, "Delta") +DEF_COLUMN(ratio, HISTC_RATIO, 14, "Ratio") DEF_COLUMN(displacement, HISTC_DISPLACEMENT, 5, "Displ") }; diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h index 36ff4c5..b24341d 100644 --- a/tools/perf/util/hist.h +++ b/tools/perf/util/hist.h @@ -46,6 +46,7 @@ enum hist_column { HISTC_NR_SAMPLES, HISTC_TOTAL_PERIOD, HISTC_DELTA, + HISTC_RATIO, HISTC_DISPLACEMENT, /* sorted (hist_entry__sort_list) */ -- 1.7.11.4
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