diff options
| -rw-r--r-- | tools/perf/Documentation/perf-diff.txt | 15 | ||||
| -rw-r--r-- | tools/perf/builtin-diff.c | 116 | ||||
| -rw-r--r-- | tools/perf/ui/hist.c | 30 | ||||
| -rw-r--r-- | tools/perf/util/hist.h | 2 | ||||
| -rw-r--r-- | tools/perf/util/sort.h | 3 |
5 files changed, 160 insertions, 6 deletions
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt index cff3d9b6e4a..fa413ac914f 100644 --- a/tools/perf/Documentation/perf-diff.txt +++ b/tools/perf/Documentation/perf-diff.txt @@ -78,7 +78,7 @@ OPTIONS -c:: --compute:: - Differential computation selection - delta,ratio (default is delta). + Differential computation selection - delta,ratio,wdiff (default is delta). If '+' is specified as a first character, the output is sorted based on the computation results. See COMPARISON METHODS section for more info. @@ -110,6 +110,19 @@ with: - period being the hist entry period value +wdiff +~~~~~ +If specified the 'Weighted diff' column is displayed with value 'd' computed as: + + d = B->period * WEIGHT-A - A->period * WEIGHT-B + + - 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 + + - WEIGHT-A/WEIGHT-B being user suplied weights in the the '-c' option + behind ':' separator like '-c wdiff:1,2'. SEE ALSO -------- diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index e13cfac0b06..d78e8386e1a 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -27,24 +27,81 @@ static bool show_displacement; static bool show_baseline_only; static bool sort_compute; +static s64 compute_wdiff_w1; +static s64 compute_wdiff_w2; + enum { COMPUTE_DELTA, COMPUTE_RATIO, + COMPUTE_WEIGHTED_DIFF, COMPUTE_MAX, }; const char *compute_names[COMPUTE_MAX] = { [COMPUTE_DELTA] = "delta", [COMPUTE_RATIO] = "ratio", + [COMPUTE_WEIGHTED_DIFF] = "wdiff", }; static int compute; +static int setup_compute_opt_wdiff(char *opt) +{ + char *w1_str = opt; + char *w2_str; + + int ret = -EINVAL; + + if (!opt) + goto out; + + w2_str = strchr(opt, ','); + if (!w2_str) + goto out; + + *w2_str++ = 0x0; + if (!*w2_str) + goto out; + + compute_wdiff_w1 = strtol(w1_str, NULL, 10); + compute_wdiff_w2 = strtol(w2_str, NULL, 10); + + if (!compute_wdiff_w1 || !compute_wdiff_w2) + goto out; + + pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n", + compute_wdiff_w1, compute_wdiff_w2); + + ret = 0; + + out: + if (ret) + pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n"); + + return ret; +} + +static int setup_compute_opt(char *opt) +{ + if (compute == COMPUTE_WEIGHTED_DIFF) + return setup_compute_opt_wdiff(opt); + + if (opt) { + pr_err("Failed: extra option specified '%s'", opt); + return -EINVAL; + } + + return 0; +} + static int setup_compute(const struct option *opt, const char *str, int unset __maybe_unused) { int *cp = (int *) opt->value; + char *cstr = (char *) str; + char buf[50]; unsigned i; + char *option; if (!str) { *cp = COMPUTE_DELTA; @@ -53,19 +110,37 @@ static int setup_compute(const struct option *opt, const char *str, if (*str == '+') { sort_compute = true; - str++; + cstr = (char *) ++str; if (!*str) return 0; } + option = strchr(str, ':'); + if (option) { + unsigned len = option++ - str; + + /* + * The str data are not writeable, so we need + * to use another buffer. + */ + + /* No option value is longer. */ + if (len >= sizeof(buf)) + return -EINVAL; + + strncpy(buf, str, len); + buf[len] = 0x0; + cstr = buf; + } + for (i = 0; i < COMPUTE_MAX; i++) - if (!strcmp(str, compute_names[i])) { + if (!strcmp(cstr, compute_names[i])) { *cp = i; - return 0; + return setup_compute_opt(option); } pr_err("Failed: '%s' is not computation method " - "(use 'delta' or 'ratio').\n", str); + "(use 'delta','ratio' or 'wdiff')\n", str); return -EINVAL; } @@ -97,6 +172,23 @@ double perf_diff__compute_ratio(struct hist_entry *he) return he->diff.period_ratio; } +s64 perf_diff__compute_wdiff(struct hist_entry *he) +{ + struct hist_entry *pair = he->pair; + u64 new_period = he->stat.period; + u64 old_period = pair ? pair->stat.period : 0; + + he->diff.computed = true; + + if (!pair) + he->diff.wdiff = 0; + else + he->diff.wdiff = new_period * compute_wdiff_w2 - + old_period * compute_wdiff_w1; + + return he->diff.wdiff; +} + static int hists__add_entry(struct hists *self, struct addr_location *al, u64 period) { @@ -275,6 +367,9 @@ static void hists__precompute(struct hists *hists) case COMPUTE_RATIO: perf_diff__compute_ratio(he); break; + case COMPUTE_WEIGHTED_DIFF: + perf_diff__compute_wdiff(he); + break; default: BUG_ON(1); } @@ -310,6 +405,13 @@ hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right, return cmp_doubles(l, r); } + case COMPUTE_WEIGHTED_DIFF: + { + s64 l = left->diff.wdiff; + s64 r = right->diff.wdiff; + + return r - l; + } default: BUG_ON(1); } @@ -434,7 +536,8 @@ 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_CALLBACK('c', "compute", &compute, "delta,ratio (default delta)", + OPT_CALLBACK('c', "compute", &compute, + "delta,ratio,wdiff:w1,w2 (default delta)", "Entries differential computation selection", setup_compute), OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, @@ -475,6 +578,9 @@ static void ui_init(void) case COMPUTE_RATIO: perf_hpp__column_enable(PERF_HPP__RATIO, true); break; + case COMPUTE_WEIGHTED_DIFF: + perf_hpp__column_enable(PERF_HPP__WEIGHTED_DIFF, true); + break; default: BUG_ON(1); }; diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c index 659f2a25e99..522b4ec051d 100644 --- a/tools/perf/ui/hist.c +++ b/tools/perf/ui/hist.c @@ -286,6 +286,35 @@ static int hpp__entry_ratio(struct perf_hpp *hpp, struct hist_entry *he) return scnprintf(hpp->buf, hpp->size, fmt, buf); } +static int hpp__header_wdiff(struct perf_hpp *hpp) +{ + const char *fmt = symbol_conf.field_sep ? "%s" : "%14s"; + + return scnprintf(hpp->buf, hpp->size, fmt, "Weighted diff"); +} + +static int hpp__width_wdiff(struct perf_hpp *hpp __maybe_unused) +{ + return 14; +} + +static int hpp__entry_wdiff(struct perf_hpp *hpp, struct hist_entry *he) +{ + const char *fmt = symbol_conf.field_sep ? "%s" : "%14s"; + char buf[32] = " "; + s64 wdiff; + + if (he->diff.computed) + wdiff = he->diff.wdiff; + else + wdiff = perf_diff__compute_wdiff(he); + + if (wdiff != 0) + scnprintf(buf, sizeof(buf), "%14ld", wdiff); + + return scnprintf(hpp->buf, hpp->size, fmt, buf); +} + static int hpp__header_displ(struct perf_hpp *hpp) { return scnprintf(hpp->buf, hpp->size, "Displ."); @@ -332,6 +361,7 @@ struct perf_hpp_fmt perf_hpp__format[] = { { .cond = false, HPP__PRINT_FNS(period) }, { .cond = false, HPP__PRINT_FNS(delta) }, { .cond = false, HPP__PRINT_FNS(ratio) }, + { .cond = false, HPP__PRINT_FNS(wdiff) }, { .cond = false, HPP__PRINT_FNS(displ) } }; diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h index a7ea28a1d50..ce76f36aeb0 100644 --- a/tools/perf/util/hist.h +++ b/tools/perf/util/hist.h @@ -142,6 +142,7 @@ enum { PERF_HPP__PERIOD, PERF_HPP__DELTA, PERF_HPP__RATIO, + PERF_HPP__WEIGHTED_DIFF, PERF_HPP__DISPL, PERF_HPP__MAX_INDEX @@ -207,4 +208,5 @@ unsigned int hists__sort_list_width(struct hists *self); double perf_diff__compute_delta(struct hist_entry *he); double perf_diff__compute_ratio(struct hist_entry *he); +s64 perf_diff__compute_wdiff(struct hist_entry *he); #endif /* __PERF_HIST_H */ diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h index 337aeefa245..13761d83a5a 100644 --- a/tools/perf/util/sort.h +++ b/tools/perf/util/sort.h @@ -63,6 +63,9 @@ struct hist_entry_diff { /* PERF_HPP__RATIO */ double period_ratio; + + /* HISTC_WEIGHTED_DIFF */ + s64 wdiff; }; /** |