diff options
Diffstat (limited to 'tools/perf/builtin-diff.c')
| -rw-r--r-- | tools/perf/builtin-diff.c | 1285 |
1 files changed, 1285 insertions, 0 deletions
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c new file mode 100644 index 000000000..df6307b40 --- /dev/null +++ b/tools/perf/builtin-diff.c @@ -0,0 +1,1285 @@ +/* + * builtin-diff.c + * + * Builtin diff command: Analyze two perf.data input files, look up and read + * DSOs and symbol information, sort them and produce a diff. + */ +#include "builtin.h" + +#include "util/debug.h" +#include "util/event.h" +#include "util/hist.h" +#include "util/evsel.h" +#include "util/evlist.h" +#include "util/session.h" +#include "util/tool.h" +#include "util/sort.h" +#include "util/symbol.h" +#include "util/util.h" +#include "util/data.h" + +#include <stdlib.h> +#include <math.h> + +/* Diff command specific HPP columns. */ +enum { + PERF_HPP_DIFF__BASELINE, + PERF_HPP_DIFF__PERIOD, + PERF_HPP_DIFF__PERIOD_BASELINE, + PERF_HPP_DIFF__DELTA, + PERF_HPP_DIFF__RATIO, + PERF_HPP_DIFF__WEIGHTED_DIFF, + PERF_HPP_DIFF__FORMULA, + + PERF_HPP_DIFF__MAX_INDEX +}; + +struct diff_hpp_fmt { + struct perf_hpp_fmt fmt; + int idx; + char *header; + int header_width; +}; + +struct data__file { + struct perf_session *session; + struct perf_data_file file; + int idx; + struct hists *hists; + struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX]; +}; + +static struct data__file *data__files; +static int data__files_cnt; + +#define data__for_each_file_start(i, d, s) \ + for (i = s, d = &data__files[s]; \ + i < data__files_cnt; \ + i++, d = &data__files[i]) + +#define data__for_each_file(i, d) data__for_each_file_start(i, d, 0) +#define data__for_each_file_new(i, d) data__for_each_file_start(i, d, 1) + +static bool force; +static bool show_period; +static bool show_formula; +static bool show_baseline_only; +static unsigned int 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 compute_2_hpp[COMPUTE_MAX] = { + [COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA, + [COMPUTE_RATIO] = PERF_HPP_DIFF__RATIO, + [COMPUTE_WEIGHTED_DIFF] = PERF_HPP_DIFF__WEIGHTED_DIFF, +}; + +#define MAX_COL_WIDTH 70 + +static struct header_column { + const char *name; + int width; +} columns[PERF_HPP_DIFF__MAX_INDEX] = { + [PERF_HPP_DIFF__BASELINE] = { + .name = "Baseline", + }, + [PERF_HPP_DIFF__PERIOD] = { + .name = "Period", + .width = 14, + }, + [PERF_HPP_DIFF__PERIOD_BASELINE] = { + .name = "Base period", + .width = 14, + }, + [PERF_HPP_DIFF__DELTA] = { + .name = "Delta", + .width = 7, + }, + [PERF_HPP_DIFF__RATIO] = { + .name = "Ratio", + .width = 14, + }, + [PERF_HPP_DIFF__WEIGHTED_DIFF] = { + .name = "Weighted diff", + .width = 14, + }, + [PERF_HPP_DIFF__FORMULA] = { + .name = "Formula", + .width = MAX_COL_WIDTH, + } +}; + +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; + 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(cstr, compute_names[i])) { + *cp = i; + return setup_compute_opt(option); + } + + pr_err("Failed: '%s' is not computation method " + "(use 'delta','ratio' or 'wdiff')\n", str); + return -EINVAL; +} + +static double period_percent(struct hist_entry *he, u64 period) +{ + u64 total = hists__total_period(he->hists); + + return (period * 100.0) / total; +} + +static double compute_delta(struct hist_entry *he, struct hist_entry *pair) +{ + double old_percent = period_percent(he, he->stat.period); + double new_percent = period_percent(pair, pair->stat.period); + + pair->diff.period_ratio_delta = new_percent - old_percent; + pair->diff.computed = true; + return pair->diff.period_ratio_delta; +} + +static double compute_ratio(struct hist_entry *he, struct hist_entry *pair) +{ + double old_period = he->stat.period ?: 1; + double new_period = pair->stat.period; + + pair->diff.computed = true; + pair->diff.period_ratio = new_period / old_period; + return pair->diff.period_ratio; +} + +static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair) +{ + u64 old_period = he->stat.period; + u64 new_period = pair->stat.period; + + pair->diff.computed = true; + pair->diff.wdiff = new_period * compute_wdiff_w2 - + old_period * compute_wdiff_w1; + + return pair->diff.wdiff; +} + +static int formula_delta(struct hist_entry *he, struct hist_entry *pair, + char *buf, size_t size) +{ + u64 he_total = he->hists->stats.total_period; + u64 pair_total = pair->hists->stats.total_period; + + if (symbol_conf.filter_relative) { + he_total = he->hists->stats.total_non_filtered_period; + pair_total = pair->hists->stats.total_non_filtered_period; + } + return scnprintf(buf, size, + "(%" PRIu64 " * 100 / %" PRIu64 ") - " + "(%" PRIu64 " * 100 / %" PRIu64 ")", + pair->stat.period, pair_total, + he->stat.period, he_total); +} + +static int formula_ratio(struct hist_entry *he, struct hist_entry *pair, + char *buf, size_t size) +{ + double old_period = he->stat.period; + double new_period = pair->stat.period; + + return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period); +} + +static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair, + char *buf, size_t size) +{ + u64 old_period = he->stat.period; + u64 new_period = pair->stat.period; + + return scnprintf(buf, size, + "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")", + new_period, compute_wdiff_w2, old_period, compute_wdiff_w1); +} + +static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair, + char *buf, size_t size) +{ + switch (compute) { + case COMPUTE_DELTA: + return formula_delta(he, pair, buf, size); + case COMPUTE_RATIO: + return formula_ratio(he, pair, buf, size); + case COMPUTE_WEIGHTED_DIFF: + return formula_wdiff(he, pair, buf, size); + default: + BUG_ON(1); + } + + return -1; +} + +static int hists__add_entry(struct hists *hists, + struct addr_location *al, u64 period, + u64 weight, u64 transaction) +{ + if (__hists__add_entry(hists, al, NULL, NULL, NULL, period, weight, + transaction, true) != NULL) + return 0; + return -ENOMEM; +} + +static int diff__process_sample_event(struct perf_tool *tool __maybe_unused, + union perf_event *event, + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine) +{ + struct addr_location al; + struct hists *hists = evsel__hists(evsel); + + if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) { + pr_warning("problem processing %d event, skipping it.\n", + event->header.type); + return -1; + } + + if (hists__add_entry(hists, &al, sample->period, + sample->weight, sample->transaction)) { + pr_warning("problem incrementing symbol period, skipping event\n"); + return -1; + } + + /* + * The total_period is updated here before going to the output + * tree since normally only the baseline hists will call + * hists__output_resort() and precompute needs the total + * period in order to sort entries by percentage delta. + */ + hists->stats.total_period += sample->period; + if (!al.filtered) + hists->stats.total_non_filtered_period += sample->period; + + return 0; +} + +static struct perf_tool tool = { + .sample = diff__process_sample_event, + .mmap = perf_event__process_mmap, + .mmap2 = perf_event__process_mmap2, + .comm = perf_event__process_comm, + .exit = perf_event__process_exit, + .fork = perf_event__process_fork, + .lost = perf_event__process_lost, + .ordered_events = true, + .ordering_requires_timestamps = true, +}; + +static struct perf_evsel *evsel_match(struct perf_evsel *evsel, + struct perf_evlist *evlist) +{ + struct perf_evsel *e; + + evlist__for_each(evlist, e) { + if (perf_evsel__match2(evsel, e)) + return e; + } + + return NULL; +} + +static void perf_evlist__collapse_resort(struct perf_evlist *evlist) +{ + struct perf_evsel *evsel; + + evlist__for_each(evlist, evsel) { + struct hists *hists = evsel__hists(evsel); + + hists__collapse_resort(hists, NULL); + } +} + +static struct data__file *fmt_to_data_file(struct perf_hpp_fmt *fmt) +{ + struct diff_hpp_fmt *dfmt = container_of(fmt, struct diff_hpp_fmt, fmt); + void *ptr = dfmt - dfmt->idx; + struct data__file *d = container_of(ptr, struct data__file, fmt); + + return d; +} + +static struct hist_entry* +get_pair_data(struct hist_entry *he, struct data__file *d) +{ + if (hist_entry__has_pairs(he)) { + struct hist_entry *pair; + + list_for_each_entry(pair, &he->pairs.head, pairs.node) + if (pair->hists == d->hists) + return pair; + } + + return NULL; +} + +static struct hist_entry* +get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt) +{ + struct data__file *d = fmt_to_data_file(&dfmt->fmt); + + return get_pair_data(he, d); +} + +static void hists__baseline_only(struct hists *hists) +{ + struct rb_root *root; + struct rb_node *next; + + if (sort__need_collapse) + root = &hists->entries_collapsed; + else + root = hists->entries_in; + + next = rb_first(root); + while (next != NULL) { + struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in); + + next = rb_next(&he->rb_node_in); + if (!hist_entry__next_pair(he)) { + rb_erase(&he->rb_node_in, root); + hist_entry__delete(he); + } + } +} + +static void hists__precompute(struct hists *hists) +{ + struct rb_root *root; + struct rb_node *next; + + if (sort__need_collapse) + root = &hists->entries_collapsed; + else + root = hists->entries_in; + + next = rb_first(root); + while (next != NULL) { + struct hist_entry *he, *pair; + struct data__file *d; + int i; + + he = rb_entry(next, struct hist_entry, rb_node_in); + next = rb_next(&he->rb_node_in); + + data__for_each_file_new(i, d) { + pair = get_pair_data(he, d); + if (!pair) + continue; + + switch (compute) { + case COMPUTE_DELTA: + compute_delta(he, pair); + break; + case COMPUTE_RATIO: + compute_ratio(he, pair); + break; + case COMPUTE_WEIGHTED_DIFF: + compute_wdiff(he, pair); + 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); + } + case COMPUTE_WEIGHTED_DIFF: + { + s64 l = left->diff.wdiff; + s64 r = right->diff.wdiff; + + return r - l; + } + default: + BUG_ON(1); + } + + return 0; +} + +static int64_t +hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right, + int c, int sort_idx) +{ + bool pairs_left = hist_entry__has_pairs(left); + bool pairs_right = hist_entry__has_pairs(right); + struct hist_entry *p_right, *p_left; + + if (!pairs_left && !pairs_right) + return 0; + + if (!pairs_left || !pairs_right) + return pairs_left ? -1 : 1; + + p_left = get_pair_data(left, &data__files[sort_idx]); + p_right = get_pair_data(right, &data__files[sort_idx]); + + if (!p_left && !p_right) + return 0; + + if (!p_left || !p_right) + return p_left ? -1 : 1; + + /* + * We have 2 entries of same kind, let's + * make the data comparison. + */ + return __hist_entry__cmp_compute(p_left, p_right, c); +} + +static int64_t +hist_entry__cmp_compute_idx(struct hist_entry *left, struct hist_entry *right, + int c, int sort_idx) +{ + struct hist_entry *p_right, *p_left; + + p_left = get_pair_data(left, &data__files[sort_idx]); + p_right = get_pair_data(right, &data__files[sort_idx]); + + if (!p_left && !p_right) + return 0; + + if (!p_left || !p_right) + return p_left ? -1 : 1; + + if (c != COMPUTE_DELTA) { + /* + * The delta can be computed without the baseline, but + * others are not. Put those entries which have no + * values below. + */ + if (left->dummy && right->dummy) + return 0; + + if (left->dummy || right->dummy) + return left->dummy ? 1 : -1; + } + + return __hist_entry__cmp_compute(p_left, p_right, c); +} + +static int64_t +hist_entry__cmp_nop(struct perf_hpp_fmt *fmt __maybe_unused, + struct hist_entry *left __maybe_unused, + struct hist_entry *right __maybe_unused) +{ + return 0; +} + +static int64_t +hist_entry__cmp_baseline(struct perf_hpp_fmt *fmt __maybe_unused, + struct hist_entry *left, struct hist_entry *right) +{ + if (left->stat.period == right->stat.period) + return 0; + return left->stat.period > right->stat.period ? 1 : -1; +} + +static int64_t +hist_entry__cmp_delta(struct perf_hpp_fmt *fmt, + struct hist_entry *left, struct hist_entry *right) +{ + struct data__file *d = fmt_to_data_file(fmt); + + return hist_entry__cmp_compute(right, left, COMPUTE_DELTA, d->idx); +} + +static int64_t +hist_entry__cmp_ratio(struct perf_hpp_fmt *fmt, + struct hist_entry *left, struct hist_entry *right) +{ + struct data__file *d = fmt_to_data_file(fmt); + + return hist_entry__cmp_compute(right, left, COMPUTE_RATIO, d->idx); +} + +static int64_t +hist_entry__cmp_wdiff(struct perf_hpp_fmt *fmt, + struct hist_entry *left, struct hist_entry *right) +{ + struct data__file *d = fmt_to_data_file(fmt); + + return hist_entry__cmp_compute(right, left, COMPUTE_WEIGHTED_DIFF, d->idx); +} + +static int64_t +hist_entry__cmp_delta_idx(struct perf_hpp_fmt *fmt __maybe_unused, + struct hist_entry *left, struct hist_entry *right) +{ + return hist_entry__cmp_compute_idx(right, left, COMPUTE_DELTA, + sort_compute); +} + +static int64_t +hist_entry__cmp_ratio_idx(struct perf_hpp_fmt *fmt __maybe_unused, + struct hist_entry *left, struct hist_entry *right) +{ + return hist_entry__cmp_compute_idx(right, left, COMPUTE_RATIO, + sort_compute); +} + +static int64_t +hist_entry__cmp_wdiff_idx(struct perf_hpp_fmt *fmt __maybe_unused, + struct hist_entry *left, struct hist_entry *right) +{ + return hist_entry__cmp_compute_idx(right, left, COMPUTE_WEIGHTED_DIFF, + sort_compute); +} + +static void hists__process(struct hists *hists) +{ + if (show_baseline_only) + hists__baseline_only(hists); + + hists__precompute(hists); + hists__output_resort(hists, NULL); + + hists__fprintf(hists, true, 0, 0, 0, stdout); +} + +static void data__fprintf(void) +{ + struct data__file *d; + int i; + + fprintf(stdout, "# Data files:\n"); + + data__for_each_file(i, d) + fprintf(stdout, "# [%d] %s %s\n", + d->idx, d->file.path, + !d->idx ? "(Baseline)" : ""); + + fprintf(stdout, "#\n"); +} + +static void data_process(void) +{ + struct perf_evlist *evlist_base = data__files[0].session->evlist; + struct perf_evsel *evsel_base; + bool first = true; + + evlist__for_each(evlist_base, evsel_base) { + struct hists *hists_base = evsel__hists(evsel_base); + struct data__file *d; + int i; + + data__for_each_file_new(i, d) { + struct perf_evlist *evlist = d->session->evlist; + struct perf_evsel *evsel; + struct hists *hists; + + evsel = evsel_match(evsel_base, evlist); + if (!evsel) + continue; + + hists = evsel__hists(evsel); + d->hists = hists; + + hists__match(hists_base, hists); + + if (!show_baseline_only) + hists__link(hists_base, hists); + } + + fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n", + perf_evsel__name(evsel_base)); + + first = false; + + if (verbose || data__files_cnt > 2) + data__fprintf(); + + hists__process(hists_base); + } +} + +static void data__free(struct data__file *d) +{ + int col; + + for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) { + struct diff_hpp_fmt *fmt = &d->fmt[col]; + + zfree(&fmt->header); + } +} + +static int __cmd_diff(void) +{ + struct data__file *d; + int ret = -EINVAL, i; + + data__for_each_file(i, d) { + d->session = perf_session__new(&d->file, false, &tool); + if (!d->session) { + pr_err("Failed to open %s\n", d->file.path); + ret = -1; + goto out_delete; + } + + ret = perf_session__process_events(d->session); + if (ret) { + pr_err("Failed to process %s\n", d->file.path); + goto out_delete; + } + + perf_evlist__collapse_resort(d->session->evlist); + } + + data_process(); + + out_delete: + data__for_each_file(i, d) { + if (d->session) + perf_session__delete(d->session); + + data__free(d); + } + + free(data__files); + return ret; +} + +static const char * const diff_usage[] = { + "perf diff [<options>] [old_file] [new_file]", + NULL, +}; + +static const struct option options[] = { + OPT_INCR('v', "verbose", &verbose, + "be more verbose (show symbol address, etc)"), + OPT_BOOLEAN('b', "baseline-only", &show_baseline_only, + "Show only items with match in baseline"), + OPT_CALLBACK('c', "compute", &compute, + "delta,ratio,wdiff:w1,w2 (default delta)", + "Entries differential computation selection", + setup_compute), + OPT_BOOLEAN('p', "period", &show_period, + "Show period values."), + OPT_BOOLEAN('F', "formula", &show_formula, + "Show formula."), + OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, + "dump raw trace in ASCII"), + OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), + OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, + "file", "kallsyms pathname"), + OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules, + "load module symbols - WARNING: use only with -k and LIVE kernel"), + OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]", + "only consider symbols in these dsos"), + OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]", + "only consider symbols in these comms"), + OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]", + "only consider these symbols"), + OPT_STRING('s', "sort", &sort_order, "key[,key2...]", + "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..." + " Please refer the man page for the complete list."), + OPT_STRING_NOEMPTY('t', "field-separator", &symbol_conf.field_sep, "separator", + "separator for columns, no spaces will be added between " + "columns '.' is reserved."), + OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory", + "Look for files with symbols relative to this directory"), + OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."), + OPT_CALLBACK(0, "percentage", NULL, "relative|absolute", + "How to display percentage of filtered entries", parse_filter_percentage), + OPT_END() +}; + +static double baseline_percent(struct hist_entry *he) +{ + u64 total = hists__total_period(he->hists); + + return 100.0 * he->stat.period / total; +} + +static int hpp__color_baseline(struct perf_hpp_fmt *fmt, + struct perf_hpp *hpp, struct hist_entry *he) +{ + struct diff_hpp_fmt *dfmt = + container_of(fmt, struct diff_hpp_fmt, fmt); + double percent = baseline_percent(he); + char pfmt[20] = " "; + + if (!he->dummy) { + scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1); + return percent_color_snprintf(hpp->buf, hpp->size, + pfmt, percent); + } else + return scnprintf(hpp->buf, hpp->size, "%*s", + dfmt->header_width, pfmt); +} + +static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size) +{ + double percent = baseline_percent(he); + const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%"; + int ret = 0; + + if (!he->dummy) + ret = scnprintf(buf, size, fmt, percent); + + return ret; +} + +static int __hpp__color_compare(struct perf_hpp_fmt *fmt, + struct perf_hpp *hpp, struct hist_entry *he, + int comparison_method) +{ + struct diff_hpp_fmt *dfmt = + container_of(fmt, struct diff_hpp_fmt, fmt); + struct hist_entry *pair = get_pair_fmt(he, dfmt); + double diff; + s64 wdiff; + char pfmt[20] = " "; + + if (!pair) + goto no_print; + + switch (comparison_method) { + case COMPUTE_DELTA: + if (pair->diff.computed) + diff = pair->diff.period_ratio_delta; + else + diff = compute_delta(he, pair); + + scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1); + return percent_color_snprintf(hpp->buf, hpp->size, + pfmt, diff); + case COMPUTE_RATIO: + if (he->dummy) + goto dummy_print; + if (pair->diff.computed) + diff = pair->diff.period_ratio; + else + diff = compute_ratio(he, pair); + + scnprintf(pfmt, 20, "%%%d.6f", dfmt->header_width); + return value_color_snprintf(hpp->buf, hpp->size, + pfmt, diff); + case COMPUTE_WEIGHTED_DIFF: + if (he->dummy) + goto dummy_print; + if (pair->diff.computed) + wdiff = pair->diff.wdiff; + else + wdiff = compute_wdiff(he, pair); + + scnprintf(pfmt, 20, "%%14ld", dfmt->header_width); + return color_snprintf(hpp->buf, hpp->size, + get_percent_color(wdiff), + pfmt, wdiff); + default: + BUG_ON(1); + } +dummy_print: + return scnprintf(hpp->buf, hpp->size, "%*s", + dfmt->header_width, "N/A"); +no_print: + return scnprintf(hpp->buf, hpp->size, "%*s", + dfmt->header_width, pfmt); +} + +static int hpp__color_delta(struct perf_hpp_fmt *fmt, + struct perf_hpp *hpp, struct hist_entry *he) +{ + return __hpp__color_compare(fmt, hpp, he, COMPUTE_DELTA); +} + +static int hpp__color_ratio(struct perf_hpp_fmt *fmt, + struct perf_hpp *hpp, struct hist_entry *he) +{ + return __hpp__color_compare(fmt, hpp, he, COMPUTE_RATIO); +} + +static int hpp__color_wdiff(struct perf_hpp_fmt *fmt, + struct perf_hpp *hpp, struct hist_entry *he) +{ + return __hpp__color_compare(fmt, hpp, he, COMPUTE_WEIGHTED_DIFF); +} + +static void +hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size) +{ + switch (idx) { + case PERF_HPP_DIFF__PERIOD_BASELINE: + scnprintf(buf, size, "%" PRIu64, he->stat.period); + break; + + default: + break; + } +} + +static void +hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair, + int idx, char *buf, size_t size) +{ + double diff; + double ratio; + s64 wdiff; + + switch (idx) { + case PERF_HPP_DIFF__DELTA: + if (pair->diff.computed) + diff = pair->diff.period_ratio_delta; + else + diff = compute_delta(he, pair); + + scnprintf(buf, size, "%+4.2F%%", diff); + break; + + case PERF_HPP_DIFF__RATIO: + /* No point for ratio number if we are dummy.. */ + if (he->dummy) { + scnprintf(buf, size, "N/A"); + break; + } + + if (pair->diff.computed) + ratio = pair->diff.period_ratio; + else + ratio = compute_ratio(he, pair); + + if (ratio > 0.0) + scnprintf(buf, size, "%14.6F", ratio); + break; + + case PERF_HPP_DIFF__WEIGHTED_DIFF: + /* No point for wdiff number if we are dummy.. */ + if (he->dummy) { + scnprintf(buf, size, "N/A"); + break; + } + + if (pair->diff.computed) + wdiff = pair->diff.wdiff; + else + wdiff = compute_wdiff(he, pair); + + if (wdiff != 0) + scnprintf(buf, size, "%14ld", wdiff); + break; + + case PERF_HPP_DIFF__FORMULA: + formula_fprintf(he, pair, buf, size); + break; + + case PERF_HPP_DIFF__PERIOD: + scnprintf(buf, size, "%" PRIu64, pair->stat.period); + break; + + default: + BUG_ON(1); + }; +} + +static void +__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt, + char *buf, size_t size) +{ + struct hist_entry *pair = get_pair_fmt(he, dfmt); + int idx = dfmt->idx; + + /* baseline is special */ + if (idx == PERF_HPP_DIFF__BASELINE) + hpp__entry_baseline(he, buf, size); + else { + if (pair) + hpp__entry_pair(he, pair, idx, buf, size); + else + hpp__entry_unpair(he, idx, buf, size); + } +} + +static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp, + struct hist_entry *he) +{ + struct diff_hpp_fmt *dfmt = + container_of(_fmt, struct diff_hpp_fmt, fmt); + char buf[MAX_COL_WIDTH] = " "; + + __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH); + + if (symbol_conf.field_sep) + return scnprintf(hpp->buf, hpp->size, "%s", buf); + else + return scnprintf(hpp->buf, hpp->size, "%*s", + dfmt->header_width, buf); +} + +static int hpp__header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp, + struct perf_evsel *evsel __maybe_unused) +{ + struct diff_hpp_fmt *dfmt = + container_of(fmt, struct diff_hpp_fmt, fmt); + + BUG_ON(!dfmt->header); + return scnprintf(hpp->buf, hpp->size, dfmt->header); +} + +static int hpp__width(struct perf_hpp_fmt *fmt, + struct perf_hpp *hpp __maybe_unused, + struct perf_evsel *evsel __maybe_unused) +{ + struct diff_hpp_fmt *dfmt = + container_of(fmt, struct diff_hpp_fmt, fmt); + + BUG_ON(dfmt->header_width <= 0); + return dfmt->header_width; +} + +static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt) +{ +#define MAX_HEADER_NAME 100 + char buf_indent[MAX_HEADER_NAME]; + char buf[MAX_HEADER_NAME]; + const char *header = NULL; + int width = 0; + + BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX); + header = columns[dfmt->idx].name; + width = columns[dfmt->idx].width; + + /* Only our defined HPP fmts should appear here. */ + BUG_ON(!header); + + if (data__files_cnt > 2) + scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx); + +#define NAME (data__files_cnt > 2 ? buf : header) + dfmt->header_width = width; + width = (int) strlen(NAME); + if (dfmt->header_width < width) + dfmt->header_width = width; + + scnprintf(buf_indent, MAX_HEADER_NAME, "%*s", + dfmt->header_width, NAME); + + dfmt->header = strdup(buf_indent); +#undef MAX_HEADER_NAME +#undef NAME +} + +static void data__hpp_register(struct data__file *d, int idx) +{ + struct diff_hpp_fmt *dfmt = &d->fmt[idx]; + struct perf_hpp_fmt *fmt = &dfmt->fmt; + + dfmt->idx = idx; + + fmt->header = hpp__header; + fmt->width = hpp__width; + fmt->entry = hpp__entry_global; + fmt->cmp = hist_entry__cmp_nop; + fmt->collapse = hist_entry__cmp_nop; + + /* TODO more colors */ + switch (idx) { + case PERF_HPP_DIFF__BASELINE: + fmt->color = hpp__color_baseline; + fmt->sort = hist_entry__cmp_baseline; + break; + case PERF_HPP_DIFF__DELTA: + fmt->color = hpp__color_delta; + fmt->sort = hist_entry__cmp_delta; + break; + case PERF_HPP_DIFF__RATIO: + fmt->color = hpp__color_ratio; + fmt->sort = hist_entry__cmp_ratio; + break; + case PERF_HPP_DIFF__WEIGHTED_DIFF: + fmt->color = hpp__color_wdiff; + fmt->sort = hist_entry__cmp_wdiff; + break; + default: + fmt->sort = hist_entry__cmp_nop; + break; + } + + init_header(d, dfmt); + perf_hpp__column_register(fmt); + perf_hpp__register_sort_field(fmt); +} + +static int ui_init(void) +{ + struct data__file *d; + struct perf_hpp_fmt *fmt; + int i; + + data__for_each_file(i, d) { + + /* + * Baseline or compute realted columns: + * + * PERF_HPP_DIFF__BASELINE + * PERF_HPP_DIFF__DELTA + * PERF_HPP_DIFF__RATIO + * PERF_HPP_DIFF__WEIGHTED_DIFF + */ + data__hpp_register(d, i ? compute_2_hpp[compute] : + PERF_HPP_DIFF__BASELINE); + + /* + * And the rest: + * + * PERF_HPP_DIFF__FORMULA + * PERF_HPP_DIFF__PERIOD + * PERF_HPP_DIFF__PERIOD_BASELINE + */ + if (show_formula && i) + data__hpp_register(d, PERF_HPP_DIFF__FORMULA); + + if (show_period) + data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD : + PERF_HPP_DIFF__PERIOD_BASELINE); + } + + if (!sort_compute) + return 0; + + /* + * Prepend an fmt to sort on columns at 'sort_compute' first. + * This fmt is added only to the sort list but not to the + * output fields list. + * + * Note that this column (data) can be compared twice - one + * for this 'sort_compute' fmt and another for the normal + * diff_hpp_fmt. But it shouldn't a problem as most entries + * will be sorted out by first try or baseline and comparing + * is not a costly operation. + */ + fmt = zalloc(sizeof(*fmt)); + if (fmt == NULL) { + pr_err("Memory allocation failed\n"); + return -1; + } + + fmt->cmp = hist_entry__cmp_nop; + fmt->collapse = hist_entry__cmp_nop; + + switch (compute) { + case COMPUTE_DELTA: + fmt->sort = hist_entry__cmp_delta_idx; + break; + case COMPUTE_RATIO: + fmt->sort = hist_entry__cmp_ratio_idx; + break; + case COMPUTE_WEIGHTED_DIFF: + fmt->sort = hist_entry__cmp_wdiff_idx; + break; + default: + BUG_ON(1); + } + + list_add(&fmt->sort_list, &perf_hpp__sort_list); + return 0; +} + +static int data_init(int argc, const char **argv) +{ + struct data__file *d; + static const char *defaults[] = { + "perf.data.old", + "perf.data", + }; + bool use_default = true; + int i; + + data__files_cnt = 2; + + if (argc) { + if (argc == 1) + defaults[1] = argv[0]; + else { + data__files_cnt = argc; + use_default = false; + } + } else if (perf_guest) { + defaults[0] = "perf.data.host"; + defaults[1] = "perf.data.guest"; + } + + if (sort_compute >= (unsigned int) data__files_cnt) { + pr_err("Order option out of limit.\n"); + return -EINVAL; + } + + data__files = zalloc(sizeof(*data__files) * data__files_cnt); + if (!data__files) + return -ENOMEM; + + data__for_each_file(i, d) { + struct perf_data_file *file = &d->file; + + file->path = use_default ? defaults[i] : argv[i]; + file->mode = PERF_DATA_MODE_READ, + file->force = force, + + d->idx = i; + } + + return 0; +} + +int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused) +{ + int ret = hists__init(); + + if (ret < 0) + return ret; + + perf_config(perf_default_config, NULL); + + argc = parse_options(argc, argv, options, diff_usage, 0); + + if (symbol__init(NULL) < 0) + return -1; + + if (data_init(argc, argv) < 0) + return -1; + + if (ui_init() < 0) + return -1; + + sort__mode = SORT_MODE__DIFF; + + if (setup_sorting() < 0) + usage_with_options(diff_usage, options); + + setup_pager(); + + sort__setup_elide(NULL); + + return __cmd_diff(); +} |