diff options
Diffstat (limited to 'tools/perf/builtin-diff.c')
| -rw-r--r-- | tools/perf/builtin-diff.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index e90c06aea4d..e13cfac0b06 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -25,6 +25,7 @@ static char diff__default_sort_order[] = "dso,symbol"; static bool force; static bool show_displacement; static bool show_baseline_only; +static bool sort_compute; enum { COMPUTE_DELTA, @@ -50,6 +51,13 @@ static int setup_compute(const struct option *opt, const char *str, return 0; } + if (*str == '+') { + sort_compute = true; + str++; + if (!*str) + return 0; + } + for (i = 0; i < COMPUTE_MAX; i++) if (!strcmp(str, compute_names[i])) { *cp = i; @@ -61,6 +69,34 @@ static int setup_compute(const struct option *opt, const char *str, return -EINVAL; } +static double get_period_percent(struct hist_entry *he, u64 period) +{ + u64 total = he->hists->stats.total_period; + return (period * 100.0) / total; +} + +double perf_diff__compute_delta(struct hist_entry *he) +{ + struct hist_entry *pair = he->pair; + double new_percent = get_period_percent(he, he->stat.period); + double old_percent = pair ? get_period_percent(pair, pair->stat.period) : 0.0; + + he->diff.period_ratio_delta = new_percent - old_percent; + he->diff.computed = true; + return he->diff.period_ratio_delta; +} + +double perf_diff__compute_ratio(struct hist_entry *he) +{ + struct hist_entry *pair = he->pair; + double new_period = he->stat.period; + double old_period = pair ? pair->stat.period : 0; + + he->diff.computed = true; + he->diff.period_ratio = pair ? (new_period / old_period) : 0; + return he->diff.period_ratio; +} + static int hists__add_entry(struct hists *self, struct addr_location *al, u64 period) { @@ -223,6 +259,102 @@ static void hists__baseline_only(struct hists *hists) } } +static void hists__precompute(struct hists *hists) +{ + struct rb_node *next = rb_first(&hists->entries); + + while (next != NULL) { + struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node); + + next = rb_next(&he->rb_node); + + switch (compute) { + case COMPUTE_DELTA: + perf_diff__compute_delta(he); + break; + case COMPUTE_RATIO: + perf_diff__compute_ratio(he); + break; + default: + BUG_ON(1); + } + } +} + +static int64_t cmp_doubles(double l, double r) +{ + if (l > r) + return -1; + else if (l < r) + return 1; + else + return 0; +} + +static int64_t +hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right, + int c) +{ + switch (c) { + case COMPUTE_DELTA: + { + double l = left->diff.period_ratio_delta; + double r = right->diff.period_ratio_delta; + + return cmp_doubles(l, r); + } + case COMPUTE_RATIO: + { + double l = left->diff.period_ratio; + double r = right->diff.period_ratio; + + return cmp_doubles(l, r); + } + default: + BUG_ON(1); + } + + return 0; +} + +static void insert_hist_entry_by_compute(struct rb_root *root, + struct hist_entry *he, + int c) +{ + struct rb_node **p = &root->rb_node; + struct rb_node *parent = NULL; + struct hist_entry *iter; + + while (*p != NULL) { + parent = *p; + iter = rb_entry(parent, struct hist_entry, rb_node); + if (hist_entry__cmp_compute(he, iter, c) < 0) + p = &(*p)->rb_left; + else + p = &(*p)->rb_right; + } + + rb_link_node(&he->rb_node, parent, p); + rb_insert_color(&he->rb_node, root); +} + +static void hists__compute_resort(struct hists *hists) +{ + struct rb_root tmp = RB_ROOT; + struct rb_node *next = rb_first(&hists->entries); + + while (next != NULL) { + struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node); + + next = rb_next(&he->rb_node); + + rb_erase(&he->rb_node, &hists->entries); + insert_hist_entry_by_compute(&tmp, he, compute); + } + + hists->entries = tmp; +} + static void hists__process(struct hists *old, struct hists *new) { hists__match(old, new); @@ -230,6 +362,11 @@ static void hists__process(struct hists *old, struct hists *new) if (show_baseline_only) hists__baseline_only(new); + if (sort_compute) { + hists__precompute(new); + hists__compute_resort(new); + } + hists__fprintf(new, true, 0, 0, stdout); } |