4 * Builtin diff command: Analyze two perf.data input files, look up and read
5 * DSOs and symbol information, sort them and produce a diff.
9 #include "util/debug.h"
10 #include "util/event.h"
11 #include "util/hist.h"
12 #include "util/evsel.h"
13 #include "util/evlist.h"
14 #include "util/session.h"
15 #include "util/tool.h"
16 #include "util/sort.h"
17 #include "util/symbol.h"
18 #include "util/util.h"
23 /* Diff command specific HPP columns. */
25 PERF_HPP_DIFF__BASELINE,
26 PERF_HPP_DIFF__PERIOD,
27 PERF_HPP_DIFF__PERIOD_BASELINE,
30 PERF_HPP_DIFF__WEIGHTED_DIFF,
31 PERF_HPP_DIFF__FORMULA,
33 PERF_HPP_DIFF__MAX_INDEX
37 struct perf_hpp_fmt fmt;
44 struct perf_session *session;
48 struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];
51 static struct data__file *data__files;
52 static int data__files_cnt;
54 #define data__for_each_file_start(i, d, s) \
55 for (i = s, d = &data__files[s]; \
56 i < data__files_cnt; \
57 i++, d = &data__files[i])
59 #define data__for_each_file(i, d) data__for_each_file_start(i, d, 0)
60 #define data__for_each_file_new(i, d) data__for_each_file_start(i, d, 1)
62 static char diff__default_sort_order[] = "dso,symbol";
64 static bool show_period;
65 static bool show_formula;
66 static bool show_baseline_only;
67 static unsigned int sort_compute;
69 static s64 compute_wdiff_w1;
70 static s64 compute_wdiff_w2;
75 COMPUTE_WEIGHTED_DIFF,
79 const char *compute_names[COMPUTE_MAX] = {
80 [COMPUTE_DELTA] = "delta",
81 [COMPUTE_RATIO] = "ratio",
82 [COMPUTE_WEIGHTED_DIFF] = "wdiff",
87 static int compute_2_hpp[COMPUTE_MAX] = {
88 [COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA,
89 [COMPUTE_RATIO] = PERF_HPP_DIFF__RATIO,
90 [COMPUTE_WEIGHTED_DIFF] = PERF_HPP_DIFF__WEIGHTED_DIFF,
93 #define MAX_COL_WIDTH 70
95 static struct header_column {
98 } columns[PERF_HPP_DIFF__MAX_INDEX] = {
99 [PERF_HPP_DIFF__BASELINE] = {
102 [PERF_HPP_DIFF__PERIOD] = {
106 [PERF_HPP_DIFF__PERIOD_BASELINE] = {
107 .name = "Base period",
110 [PERF_HPP_DIFF__DELTA] = {
114 [PERF_HPP_DIFF__RATIO] = {
118 [PERF_HPP_DIFF__WEIGHTED_DIFF] = {
119 .name = "Weighted diff",
122 [PERF_HPP_DIFF__FORMULA] = {
124 .width = MAX_COL_WIDTH,
128 static int setup_compute_opt_wdiff(char *opt)
138 w2_str = strchr(opt, ',');
146 compute_wdiff_w1 = strtol(w1_str, NULL, 10);
147 compute_wdiff_w2 = strtol(w2_str, NULL, 10);
149 if (!compute_wdiff_w1 || !compute_wdiff_w2)
152 pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n",
153 compute_wdiff_w1, compute_wdiff_w2);
159 pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n");
164 static int setup_compute_opt(char *opt)
166 if (compute == COMPUTE_WEIGHTED_DIFF)
167 return setup_compute_opt_wdiff(opt);
170 pr_err("Failed: extra option specified '%s'", opt);
177 static int setup_compute(const struct option *opt, const char *str,
178 int unset __maybe_unused)
180 int *cp = (int *) opt->value;
181 char *cstr = (char *) str;
191 option = strchr(str, ':');
193 unsigned len = option++ - str;
196 * The str data are not writeable, so we need
197 * to use another buffer.
200 /* No option value is longer. */
201 if (len >= sizeof(buf))
204 strncpy(buf, str, len);
209 for (i = 0; i < COMPUTE_MAX; i++)
210 if (!strcmp(cstr, compute_names[i])) {
212 return setup_compute_opt(option);
215 pr_err("Failed: '%s' is not computation method "
216 "(use 'delta','ratio' or 'wdiff')\n", str);
220 static double period_percent(struct hist_entry *he, u64 period)
222 u64 total = he->hists->stats.total_period;
223 return (period * 100.0) / total;
226 static double compute_delta(struct hist_entry *he, struct hist_entry *pair)
228 double old_percent = period_percent(he, he->stat.period);
229 double new_percent = period_percent(pair, pair->stat.period);
231 pair->diff.period_ratio_delta = new_percent - old_percent;
232 pair->diff.computed = true;
233 return pair->diff.period_ratio_delta;
236 static double compute_ratio(struct hist_entry *he, struct hist_entry *pair)
238 double old_period = he->stat.period ?: 1;
239 double new_period = pair->stat.period;
241 pair->diff.computed = true;
242 pair->diff.period_ratio = new_period / old_period;
243 return pair->diff.period_ratio;
246 static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
248 u64 old_period = he->stat.period;
249 u64 new_period = pair->stat.period;
251 pair->diff.computed = true;
252 pair->diff.wdiff = new_period * compute_wdiff_w2 -
253 old_period * compute_wdiff_w1;
255 return pair->diff.wdiff;
258 static int formula_delta(struct hist_entry *he, struct hist_entry *pair,
259 char *buf, size_t size)
261 return scnprintf(buf, size,
262 "(%" PRIu64 " * 100 / %" PRIu64 ") - "
263 "(%" PRIu64 " * 100 / %" PRIu64 ")",
264 pair->stat.period, pair->hists->stats.total_period,
265 he->stat.period, he->hists->stats.total_period);
268 static int formula_ratio(struct hist_entry *he, struct hist_entry *pair,
269 char *buf, size_t size)
271 double old_period = he->stat.period;
272 double new_period = pair->stat.period;
274 return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
277 static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair,
278 char *buf, size_t size)
280 u64 old_period = he->stat.period;
281 u64 new_period = pair->stat.period;
283 return scnprintf(buf, size,
284 "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
285 new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
288 static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair,
289 char *buf, size_t size)
293 return formula_delta(he, pair, buf, size);
295 return formula_ratio(he, pair, buf, size);
296 case COMPUTE_WEIGHTED_DIFF:
297 return formula_wdiff(he, pair, buf, size);
305 static int hists__add_entry(struct hists *self,
306 struct addr_location *al, u64 period,
309 if (__hists__add_entry(self, al, NULL, period, weight) != NULL)
314 static int diff__process_sample_event(struct perf_tool *tool __maybe_unused,
315 union perf_event *event,
316 struct perf_sample *sample,
317 struct perf_evsel *evsel,
318 struct machine *machine)
320 struct addr_location al;
322 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
323 pr_warning("problem processing %d event, skipping it.\n",
331 if (hists__add_entry(&evsel->hists, &al, sample->period, sample->weight)) {
332 pr_warning("problem incrementing symbol period, skipping event\n");
336 evsel->hists.stats.total_period += sample->period;
340 static struct perf_tool tool = {
341 .sample = diff__process_sample_event,
342 .mmap = perf_event__process_mmap,
343 .comm = perf_event__process_comm,
344 .exit = perf_event__process_exit,
345 .fork = perf_event__process_fork,
346 .lost = perf_event__process_lost,
347 .ordered_samples = true,
348 .ordering_requires_timestamps = true,
351 static struct perf_evsel *evsel_match(struct perf_evsel *evsel,
352 struct perf_evlist *evlist)
354 struct perf_evsel *e;
356 list_for_each_entry(e, &evlist->entries, node)
357 if (perf_evsel__match2(evsel, e))
363 static void perf_evlist__collapse_resort(struct perf_evlist *evlist)
365 struct perf_evsel *evsel;
367 list_for_each_entry(evsel, &evlist->entries, node) {
368 struct hists *hists = &evsel->hists;
370 hists__collapse_resort(hists);
374 static struct hist_entry*
375 get_pair_data(struct hist_entry *he, struct data__file *d)
377 if (hist_entry__has_pairs(he)) {
378 struct hist_entry *pair;
380 list_for_each_entry(pair, &he->pairs.head, pairs.node)
381 if (pair->hists == d->hists)
388 static struct hist_entry*
389 get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
391 void *ptr = dfmt - dfmt->idx;
392 struct data__file *d = container_of(ptr, struct data__file, fmt);
394 return get_pair_data(he, d);
397 static void hists__baseline_only(struct hists *hists)
399 struct rb_root *root;
400 struct rb_node *next;
402 if (sort__need_collapse)
403 root = &hists->entries_collapsed;
405 root = hists->entries_in;
407 next = rb_first(root);
408 while (next != NULL) {
409 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
411 next = rb_next(&he->rb_node_in);
412 if (!hist_entry__next_pair(he)) {
413 rb_erase(&he->rb_node_in, root);
414 hist_entry__free(he);
419 static void hists__precompute(struct hists *hists)
421 struct rb_root *root;
422 struct rb_node *next;
424 if (sort__need_collapse)
425 root = &hists->entries_collapsed;
427 root = hists->entries_in;
429 next = rb_first(root);
430 while (next != NULL) {
431 struct hist_entry *he, *pair;
433 he = rb_entry(next, struct hist_entry, rb_node_in);
434 next = rb_next(&he->rb_node_in);
436 pair = get_pair_data(he, &data__files[sort_compute]);
442 compute_delta(he, pair);
445 compute_ratio(he, pair);
447 case COMPUTE_WEIGHTED_DIFF:
448 compute_wdiff(he, pair);
456 static int64_t cmp_doubles(double l, double r)
467 __hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
473 double l = left->diff.period_ratio_delta;
474 double r = right->diff.period_ratio_delta;
476 return cmp_doubles(l, r);
480 double l = left->diff.period_ratio;
481 double r = right->diff.period_ratio;
483 return cmp_doubles(l, r);
485 case COMPUTE_WEIGHTED_DIFF:
487 s64 l = left->diff.wdiff;
488 s64 r = right->diff.wdiff;
500 hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
503 bool pairs_left = hist_entry__has_pairs(left);
504 bool pairs_right = hist_entry__has_pairs(right);
505 struct hist_entry *p_right, *p_left;
507 if (!pairs_left && !pairs_right)
510 if (!pairs_left || !pairs_right)
511 return pairs_left ? -1 : 1;
513 p_left = get_pair_data(left, &data__files[sort_compute]);
514 p_right = get_pair_data(right, &data__files[sort_compute]);
516 if (!p_left && !p_right)
519 if (!p_left || !p_right)
520 return p_left ? -1 : 1;
523 * We have 2 entries of same kind, let's
524 * make the data comparison.
526 return __hist_entry__cmp_compute(p_left, p_right, c);
529 static void insert_hist_entry_by_compute(struct rb_root *root,
530 struct hist_entry *he,
533 struct rb_node **p = &root->rb_node;
534 struct rb_node *parent = NULL;
535 struct hist_entry *iter;
539 iter = rb_entry(parent, struct hist_entry, rb_node);
540 if (hist_entry__cmp_compute(he, iter, c) < 0)
546 rb_link_node(&he->rb_node, parent, p);
547 rb_insert_color(&he->rb_node, root);
550 static void hists__compute_resort(struct hists *hists)
552 struct rb_root *root;
553 struct rb_node *next;
555 if (sort__need_collapse)
556 root = &hists->entries_collapsed;
558 root = hists->entries_in;
560 hists->entries = RB_ROOT;
561 next = rb_first(root);
563 hists->nr_entries = 0;
564 hists->stats.total_period = 0;
565 hists__reset_col_len(hists);
567 while (next != NULL) {
568 struct hist_entry *he;
570 he = rb_entry(next, struct hist_entry, rb_node_in);
571 next = rb_next(&he->rb_node_in);
573 insert_hist_entry_by_compute(&hists->entries, he, compute);
574 hists__inc_nr_entries(hists, he);
578 static void hists__process(struct hists *hists)
580 if (show_baseline_only)
581 hists__baseline_only(hists);
584 hists__precompute(hists);
585 hists__compute_resort(hists);
587 hists__output_resort(hists);
590 hists__fprintf(hists, true, 0, 0, 0, stdout);
593 static void data__fprintf(void)
595 struct data__file *d;
598 fprintf(stdout, "# Data files:\n");
600 data__for_each_file(i, d)
601 fprintf(stdout, "# [%d] %s %s\n",
603 !d->idx ? "(Baseline)" : "");
605 fprintf(stdout, "#\n");
608 static void data_process(void)
610 struct perf_evlist *evlist_base = data__files[0].session->evlist;
611 struct perf_evsel *evsel_base;
614 list_for_each_entry(evsel_base, &evlist_base->entries, node) {
615 struct data__file *d;
618 data__for_each_file_new(i, d) {
619 struct perf_evlist *evlist = d->session->evlist;
620 struct perf_evsel *evsel;
622 evsel = evsel_match(evsel_base, evlist);
626 d->hists = &evsel->hists;
628 hists__match(&evsel_base->hists, &evsel->hists);
630 if (!show_baseline_only)
631 hists__link(&evsel_base->hists,
635 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
636 perf_evsel__name(evsel_base));
640 if (verbose || data__files_cnt > 2)
643 hists__process(&evsel_base->hists);
647 static void data__free(struct data__file *d)
651 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
652 struct diff_hpp_fmt *fmt = &d->fmt[col];
658 static int __cmd_diff(void)
660 struct data__file *d;
661 int ret = -EINVAL, i;
663 data__for_each_file(i, d) {
664 d->session = perf_session__new(d->file, O_RDONLY, force,
667 pr_err("Failed to open %s\n", d->file);
672 ret = perf_session__process_events(d->session, &tool);
674 pr_err("Failed to process %s\n", d->file);
678 perf_evlist__collapse_resort(d->session->evlist);
684 data__for_each_file(i, d) {
686 perf_session__delete(d->session);
695 static const char * const diff_usage[] = {
696 "perf diff [<options>] [old_file] [new_file]",
700 static const struct option options[] = {
701 OPT_INCR('v', "verbose", &verbose,
702 "be more verbose (show symbol address, etc)"),
703 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
704 "Show only items with match in baseline"),
705 OPT_CALLBACK('c', "compute", &compute,
706 "delta,ratio,wdiff:w1,w2 (default delta)",
707 "Entries differential computation selection",
709 OPT_BOOLEAN('p', "period", &show_period,
710 "Show period values."),
711 OPT_BOOLEAN('F', "formula", &show_formula,
713 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
714 "dump raw trace in ASCII"),
715 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
716 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
717 "load module symbols - WARNING: use only with -k and LIVE kernel"),
718 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
719 "only consider symbols in these dsos"),
720 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
721 "only consider symbols in these comms"),
722 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
723 "only consider these symbols"),
724 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
725 "sort by key(s): pid, comm, dso, symbol, parent"),
726 OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
727 "separator for columns, no spaces will be added between "
728 "columns '.' is reserved."),
729 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
730 "Look for files with symbols relative to this directory"),
731 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
735 static double baseline_percent(struct hist_entry *he)
737 struct hists *hists = he->hists;
738 return 100.0 * he->stat.period / hists->stats.total_period;
741 static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
742 struct perf_hpp *hpp, struct hist_entry *he)
744 struct diff_hpp_fmt *dfmt =
745 container_of(fmt, struct diff_hpp_fmt, fmt);
746 double percent = baseline_percent(he);
750 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
751 return percent_color_snprintf(hpp->buf, hpp->size,
754 return scnprintf(hpp->buf, hpp->size, "%*s",
755 dfmt->header_width, pfmt);
758 static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
760 double percent = baseline_percent(he);
761 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
765 ret = scnprintf(buf, size, fmt, percent);
771 hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
774 case PERF_HPP_DIFF__PERIOD_BASELINE:
775 scnprintf(buf, size, "%" PRIu64, he->stat.period);
784 hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
785 int idx, char *buf, size_t size)
792 case PERF_HPP_DIFF__DELTA:
793 if (pair->diff.computed)
794 diff = pair->diff.period_ratio_delta;
796 diff = compute_delta(he, pair);
798 if (fabs(diff) >= 0.01)
799 scnprintf(buf, size, "%+4.2F%%", diff);
802 case PERF_HPP_DIFF__RATIO:
803 /* No point for ratio number if we are dummy.. */
807 if (pair->diff.computed)
808 ratio = pair->diff.period_ratio;
810 ratio = compute_ratio(he, pair);
813 scnprintf(buf, size, "%14.6F", ratio);
816 case PERF_HPP_DIFF__WEIGHTED_DIFF:
817 /* No point for wdiff number if we are dummy.. */
821 if (pair->diff.computed)
822 wdiff = pair->diff.wdiff;
824 wdiff = compute_wdiff(he, pair);
827 scnprintf(buf, size, "%14ld", wdiff);
830 case PERF_HPP_DIFF__FORMULA:
831 formula_fprintf(he, pair, buf, size);
834 case PERF_HPP_DIFF__PERIOD:
835 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
844 __hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
845 char *buf, size_t size)
847 struct hist_entry *pair = get_pair_fmt(he, dfmt);
850 /* baseline is special */
851 if (idx == PERF_HPP_DIFF__BASELINE)
852 hpp__entry_baseline(he, buf, size);
855 hpp__entry_pair(he, pair, idx, buf, size);
857 hpp__entry_unpair(he, idx, buf, size);
861 static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
862 struct hist_entry *he)
864 struct diff_hpp_fmt *dfmt =
865 container_of(_fmt, struct diff_hpp_fmt, fmt);
866 char buf[MAX_COL_WIDTH] = " ";
868 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
870 if (symbol_conf.field_sep)
871 return scnprintf(hpp->buf, hpp->size, "%s", buf);
873 return scnprintf(hpp->buf, hpp->size, "%*s",
874 dfmt->header_width, buf);
877 static int hpp__header(struct perf_hpp_fmt *fmt,
878 struct perf_hpp *hpp)
880 struct diff_hpp_fmt *dfmt =
881 container_of(fmt, struct diff_hpp_fmt, fmt);
883 BUG_ON(!dfmt->header);
884 return scnprintf(hpp->buf, hpp->size, dfmt->header);
887 static int hpp__width(struct perf_hpp_fmt *fmt,
888 struct perf_hpp *hpp __maybe_unused)
890 struct diff_hpp_fmt *dfmt =
891 container_of(fmt, struct diff_hpp_fmt, fmt);
893 BUG_ON(dfmt->header_width <= 0);
894 return dfmt->header_width;
897 static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
899 #define MAX_HEADER_NAME 100
900 char buf_indent[MAX_HEADER_NAME];
901 char buf[MAX_HEADER_NAME];
902 const char *header = NULL;
905 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
906 header = columns[dfmt->idx].name;
907 width = columns[dfmt->idx].width;
909 /* Only our defined HPP fmts should appear here. */
912 if (data__files_cnt > 2)
913 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
915 #define NAME (data__files_cnt > 2 ? buf : header)
916 dfmt->header_width = width;
917 width = (int) strlen(NAME);
918 if (dfmt->header_width < width)
919 dfmt->header_width = width;
921 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
922 dfmt->header_width, NAME);
924 dfmt->header = strdup(buf_indent);
925 #undef MAX_HEADER_NAME
929 static void data__hpp_register(struct data__file *d, int idx)
931 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
932 struct perf_hpp_fmt *fmt = &dfmt->fmt;
936 fmt->header = hpp__header;
937 fmt->width = hpp__width;
938 fmt->entry = hpp__entry_global;
940 /* TODO more colors */
941 if (idx == PERF_HPP_DIFF__BASELINE)
942 fmt->color = hpp__color_baseline;
944 init_header(d, dfmt);
945 perf_hpp__column_register(fmt);
948 static void ui_init(void)
950 struct data__file *d;
953 data__for_each_file(i, d) {
956 * Baseline or compute realted columns:
958 * PERF_HPP_DIFF__BASELINE
959 * PERF_HPP_DIFF__DELTA
960 * PERF_HPP_DIFF__RATIO
961 * PERF_HPP_DIFF__WEIGHTED_DIFF
963 data__hpp_register(d, i ? compute_2_hpp[compute] :
964 PERF_HPP_DIFF__BASELINE);
969 * PERF_HPP_DIFF__FORMULA
970 * PERF_HPP_DIFF__PERIOD
971 * PERF_HPP_DIFF__PERIOD_BASELINE
973 if (show_formula && i)
974 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
977 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
978 PERF_HPP_DIFF__PERIOD_BASELINE);
982 static int data_init(int argc, const char **argv)
984 struct data__file *d;
985 static const char *defaults[] = {
989 bool use_default = true;
996 defaults[1] = argv[0];
998 data__files_cnt = argc;
1001 } else if (symbol_conf.default_guest_vmlinux_name ||
1002 symbol_conf.default_guest_kallsyms) {
1003 defaults[0] = "perf.data.host";
1004 defaults[1] = "perf.data.guest";
1007 if (sort_compute >= (unsigned int) data__files_cnt) {
1008 pr_err("Order option out of limit.\n");
1012 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1016 data__for_each_file(i, d) {
1017 d->file = use_default ? defaults[i] : argv[i];
1024 int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
1026 sort_order = diff__default_sort_order;
1027 argc = parse_options(argc, argv, options, diff_usage, 0);
1029 if (symbol__init() < 0)
1032 if (data_init(argc, argv) < 0)
1037 if (setup_sorting() < 0)
1038 usage_with_options(diff_usage, options);
1042 sort__setup_elide(NULL);
1044 return __cmd_diff();