Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 1 | /* |
| 2 | * builtin-diff.c |
| 3 | * |
| 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. |
| 6 | */ |
| 7 | #include "builtin.h" |
| 8 | |
| 9 | #include "util/debug.h" |
| 10 | #include "util/event.h" |
| 11 | #include "util/hist.h" |
Arnaldo Carvalho de Melo | 743eb868 | 2011-11-28 07:56:39 -0200 | [diff] [blame] | 12 | #include "util/evsel.h" |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 13 | #include "util/session.h" |
Arnaldo Carvalho de Melo | 45694aa | 2011-11-28 08:30:20 -0200 | [diff] [blame] | 14 | #include "util/tool.h" |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 15 | #include "util/sort.h" |
| 16 | #include "util/symbol.h" |
| 17 | #include "util/util.h" |
| 18 | |
| 19 | #include <stdlib.h> |
| 20 | |
Arnaldo Carvalho de Melo | c351c28 | 2009-12-16 13:49:27 -0200 | [diff] [blame] | 21 | static char const *input_old = "perf.data.old", |
| 22 | *input_new = "perf.data"; |
Arnaldo Carvalho de Melo | 604c5c9 | 2009-12-16 14:09:53 -0200 | [diff] [blame] | 23 | static char diff__default_sort_order[] = "dso,symbol"; |
Ian Munsie | c055564 | 2010-04-13 18:37:33 +1000 | [diff] [blame] | 24 | static bool force; |
Arnaldo Carvalho de Melo | c351c28 | 2009-12-16 13:49:27 -0200 | [diff] [blame] | 25 | static bool show_displacement; |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 26 | |
Jiri Olsa | 4bf9ce1 | 2012-03-22 14:37:26 +0100 | [diff] [blame] | 27 | struct perf_diff { |
| 28 | struct perf_tool tool; |
| 29 | struct perf_session *session; |
| 30 | }; |
| 31 | |
Arnaldo Carvalho de Melo | 1c02c4d | 2010-05-10 13:04:11 -0300 | [diff] [blame] | 32 | static int hists__add_entry(struct hists *self, |
Arnaldo Carvalho de Melo | c82ee82 | 2010-05-14 14:19:35 -0300 | [diff] [blame] | 33 | struct addr_location *al, u64 period) |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 34 | { |
Arnaldo Carvalho de Melo | c82ee82 | 2010-05-14 14:19:35 -0300 | [diff] [blame] | 35 | if (__hists__add_entry(self, al, NULL, period) != NULL) |
Arnaldo Carvalho de Melo | 28e2a10 | 2010-05-09 13:02:23 -0300 | [diff] [blame] | 36 | return 0; |
| 37 | return -ENOMEM; |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 38 | } |
| 39 | |
Jiri Olsa | 4bf9ce1 | 2012-03-22 14:37:26 +0100 | [diff] [blame] | 40 | static int diff__process_sample_event(struct perf_tool *tool, |
Arnaldo Carvalho de Melo | d20deb6 | 2011-11-25 08:19:45 -0200 | [diff] [blame] | 41 | union perf_event *event, |
Arnaldo Carvalho de Melo | 8d50e5b | 2011-01-29 13:02:00 -0200 | [diff] [blame] | 42 | struct perf_sample *sample, |
Arnaldo Carvalho de Melo | 9e69c21 | 2011-03-15 15:44:01 -0300 | [diff] [blame] | 43 | struct perf_evsel *evsel __used, |
Arnaldo Carvalho de Melo | 743eb868 | 2011-11-28 07:56:39 -0200 | [diff] [blame] | 44 | struct machine *machine) |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 45 | { |
Jiri Olsa | 4bf9ce1 | 2012-03-22 14:37:26 +0100 | [diff] [blame] | 46 | struct perf_diff *_diff = container_of(tool, struct perf_diff, tool); |
| 47 | struct perf_session *session = _diff->session; |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 48 | struct addr_location al; |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 49 | |
Arnaldo Carvalho de Melo | 743eb868 | 2011-11-28 07:56:39 -0200 | [diff] [blame] | 50 | if (perf_event__preprocess_sample(event, machine, &al, sample, NULL) < 0) { |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 51 | pr_warning("problem processing %d event, skipping it.\n", |
| 52 | event->header.type); |
| 53 | return -1; |
| 54 | } |
| 55 | |
Arnaldo Carvalho de Melo | cdbae31 | 2009-12-28 22:48:35 -0200 | [diff] [blame] | 56 | if (al.filtered || al.sym == NULL) |
Arnaldo Carvalho de Melo | c410a33 | 2009-12-15 20:04:41 -0200 | [diff] [blame] | 57 | return 0; |
| 58 | |
Jiri Olsa | 4bf9ce1 | 2012-03-22 14:37:26 +0100 | [diff] [blame] | 59 | if (hists__add_entry(&session->hists, &al, sample->period)) { |
Arnaldo Carvalho de Melo | c82ee82 | 2010-05-14 14:19:35 -0300 | [diff] [blame] | 60 | pr_warning("problem incrementing symbol period, skipping event\n"); |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 61 | return -1; |
| 62 | } |
| 63 | |
Jiri Olsa | 4bf9ce1 | 2012-03-22 14:37:26 +0100 | [diff] [blame] | 64 | session->hists.stats.total_period += sample->period; |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 65 | return 0; |
| 66 | } |
| 67 | |
Jiri Olsa | 4bf9ce1 | 2012-03-22 14:37:26 +0100 | [diff] [blame] | 68 | static struct perf_diff diff = { |
| 69 | .tool = { |
| 70 | .sample = diff__process_sample_event, |
| 71 | .mmap = perf_event__process_mmap, |
| 72 | .comm = perf_event__process_comm, |
| 73 | .exit = perf_event__process_task, |
| 74 | .fork = perf_event__process_task, |
| 75 | .lost = perf_event__process_lost, |
| 76 | .ordered_samples = true, |
| 77 | .ordering_requires_timestamps = true, |
| 78 | }, |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 79 | }; |
| 80 | |
| 81 | static void perf_session__insert_hist_entry_by_name(struct rb_root *root, |
| 82 | struct hist_entry *he) |
| 83 | { |
| 84 | struct rb_node **p = &root->rb_node; |
| 85 | struct rb_node *parent = NULL; |
| 86 | struct hist_entry *iter; |
| 87 | |
| 88 | while (*p != NULL) { |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 89 | parent = *p; |
| 90 | iter = rb_entry(parent, struct hist_entry, rb_node); |
Arnaldo Carvalho de Melo | 9c443df | 2009-12-28 22:48:36 -0200 | [diff] [blame] | 91 | if (hist_entry__cmp(he, iter) < 0) |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 92 | p = &(*p)->rb_left; |
Arnaldo Carvalho de Melo | 9c443df | 2009-12-28 22:48:36 -0200 | [diff] [blame] | 93 | else |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 94 | p = &(*p)->rb_right; |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | rb_link_node(&he->rb_node, parent, p); |
| 98 | rb_insert_color(&he->rb_node, root); |
| 99 | } |
| 100 | |
Arnaldo Carvalho de Melo | 1c02c4d | 2010-05-10 13:04:11 -0300 | [diff] [blame] | 101 | static void hists__resort_entries(struct hists *self) |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 102 | { |
| 103 | unsigned long position = 1; |
| 104 | struct rb_root tmp = RB_ROOT; |
Arnaldo Carvalho de Melo | 1c02c4d | 2010-05-10 13:04:11 -0300 | [diff] [blame] | 105 | struct rb_node *next = rb_first(&self->entries); |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 106 | |
| 107 | while (next != NULL) { |
| 108 | struct hist_entry *n = rb_entry(next, struct hist_entry, rb_node); |
| 109 | |
| 110 | next = rb_next(&n->rb_node); |
Arnaldo Carvalho de Melo | 1c02c4d | 2010-05-10 13:04:11 -0300 | [diff] [blame] | 111 | rb_erase(&n->rb_node, &self->entries); |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 112 | n->position = position++; |
| 113 | perf_session__insert_hist_entry_by_name(&tmp, n); |
| 114 | } |
| 115 | |
Arnaldo Carvalho de Melo | 1c02c4d | 2010-05-10 13:04:11 -0300 | [diff] [blame] | 116 | self->entries = tmp; |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 117 | } |
| 118 | |
Arnaldo Carvalho de Melo | 1c02c4d | 2010-05-10 13:04:11 -0300 | [diff] [blame] | 119 | static struct hist_entry *hists__find_entry(struct hists *self, |
| 120 | struct hist_entry *he) |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 121 | { |
Arnaldo Carvalho de Melo | 1c02c4d | 2010-05-10 13:04:11 -0300 | [diff] [blame] | 122 | struct rb_node *n = self->entries.rb_node; |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 123 | |
| 124 | while (n) { |
| 125 | struct hist_entry *iter = rb_entry(n, struct hist_entry, rb_node); |
Arnaldo Carvalho de Melo | 9c443df | 2009-12-28 22:48:36 -0200 | [diff] [blame] | 126 | int64_t cmp = hist_entry__cmp(he, iter); |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 127 | |
Arnaldo Carvalho de Melo | 9c443df | 2009-12-28 22:48:36 -0200 | [diff] [blame] | 128 | if (cmp < 0) |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 129 | n = n->rb_left; |
Arnaldo Carvalho de Melo | 9c443df | 2009-12-28 22:48:36 -0200 | [diff] [blame] | 130 | else if (cmp > 0) |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 131 | n = n->rb_right; |
Arnaldo Carvalho de Melo | 9c443df | 2009-12-28 22:48:36 -0200 | [diff] [blame] | 132 | else |
| 133 | return iter; |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | return NULL; |
| 137 | } |
| 138 | |
Arnaldo Carvalho de Melo | 1c02c4d | 2010-05-10 13:04:11 -0300 | [diff] [blame] | 139 | static void hists__match(struct hists *older, struct hists *newer) |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 140 | { |
| 141 | struct rb_node *nd; |
| 142 | |
Arnaldo Carvalho de Melo | 1c02c4d | 2010-05-10 13:04:11 -0300 | [diff] [blame] | 143 | for (nd = rb_first(&newer->entries); nd; nd = rb_next(nd)) { |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 144 | struct hist_entry *pos = rb_entry(nd, struct hist_entry, rb_node); |
Arnaldo Carvalho de Melo | 1c02c4d | 2010-05-10 13:04:11 -0300 | [diff] [blame] | 145 | pos->pair = hists__find_entry(older, pos); |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 146 | } |
| 147 | } |
| 148 | |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 149 | static int __cmd_diff(void) |
| 150 | { |
| 151 | int ret, i; |
Jiri Olsa | 4bf9ce1 | 2012-03-22 14:37:26 +0100 | [diff] [blame] | 152 | #define older (session[0]) |
| 153 | #define newer (session[1]) |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 154 | struct perf_session *session[2]; |
| 155 | |
Jiri Olsa | 4bf9ce1 | 2012-03-22 14:37:26 +0100 | [diff] [blame] | 156 | older = perf_session__new(input_old, O_RDONLY, force, false, |
| 157 | &diff.tool); |
| 158 | newer = perf_session__new(input_new, O_RDONLY, force, false, |
| 159 | &diff.tool); |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 160 | if (session[0] == NULL || session[1] == NULL) |
| 161 | return -ENOMEM; |
| 162 | |
| 163 | for (i = 0; i < 2; ++i) { |
Jiri Olsa | 4bf9ce1 | 2012-03-22 14:37:26 +0100 | [diff] [blame] | 164 | diff.session = session[i]; |
| 165 | ret = perf_session__process_events(session[i], &diff.tool); |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 166 | if (ret) |
| 167 | goto out_delete; |
Jiri Olsa | 4bf9ce1 | 2012-03-22 14:37:26 +0100 | [diff] [blame] | 168 | hists__output_resort(&session[i]->hists); |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 169 | } |
| 170 | |
Arnaldo Carvalho de Melo | 9c443df | 2009-12-28 22:48:36 -0200 | [diff] [blame] | 171 | if (show_displacement) |
Jiri Olsa | 4bf9ce1 | 2012-03-22 14:37:26 +0100 | [diff] [blame] | 172 | hists__resort_entries(&older->hists); |
Arnaldo Carvalho de Melo | 9c443df | 2009-12-28 22:48:36 -0200 | [diff] [blame] | 173 | |
Jiri Olsa | 4bf9ce1 | 2012-03-22 14:37:26 +0100 | [diff] [blame] | 174 | hists__match(&older->hists, &newer->hists); |
| 175 | hists__fprintf(&newer->hists, &older->hists, |
Arnaldo Carvalho de Melo | ef9dfe6 | 2011-09-26 12:46:11 -0300 | [diff] [blame] | 176 | show_displacement, true, 0, 0, stdout); |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 177 | out_delete: |
| 178 | for (i = 0; i < 2; ++i) |
| 179 | perf_session__delete(session[i]); |
| 180 | return ret; |
Jiri Olsa | 4bf9ce1 | 2012-03-22 14:37:26 +0100 | [diff] [blame] | 181 | #undef older |
| 182 | #undef newer |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 183 | } |
| 184 | |
Arnaldo Carvalho de Melo | 0422a4f | 2009-12-18 16:35:58 -0200 | [diff] [blame] | 185 | static const char * const diff_usage[] = { |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 186 | "perf diff [<options>] [old_file] [new_file]", |
Arnaldo Carvalho de Melo | 0422a4f | 2009-12-18 16:35:58 -0200 | [diff] [blame] | 187 | NULL, |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 188 | }; |
| 189 | |
| 190 | static const struct option options[] = { |
Ian Munsie | c055564 | 2010-04-13 18:37:33 +1000 | [diff] [blame] | 191 | OPT_INCR('v', "verbose", &verbose, |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 192 | "be more verbose (show symbol address, etc)"), |
Shawn Bohrer | 3429555 | 2010-11-30 19:57:11 -0600 | [diff] [blame] | 193 | OPT_BOOLEAN('M', "displacement", &show_displacement, |
Arnaldo Carvalho de Melo | c351c28 | 2009-12-16 13:49:27 -0200 | [diff] [blame] | 194 | "Show position displacement relative to baseline"), |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 195 | OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, |
| 196 | "dump raw trace in ASCII"), |
| 197 | OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), |
| 198 | OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules, |
| 199 | "load module symbols - WARNING: use only with -k and LIVE kernel"), |
Arnaldo Carvalho de Melo | c410a33 | 2009-12-15 20:04:41 -0200 | [diff] [blame] | 200 | OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]", |
| 201 | "only consider symbols in these dsos"), |
| 202 | OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]", |
| 203 | "only consider symbols in these comms"), |
| 204 | OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]", |
| 205 | "only consider these symbols"), |
Arnaldo Carvalho de Melo | c351c28 | 2009-12-16 13:49:27 -0200 | [diff] [blame] | 206 | OPT_STRING('s', "sort", &sort_order, "key[,key2...]", |
| 207 | "sort by key(s): pid, comm, dso, symbol, parent"), |
| 208 | OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator", |
| 209 | "separator for columns, no spaces will be added between " |
| 210 | "columns '.' is reserved."), |
David Ahern | ec5761e | 2010-12-09 13:27:07 -0700 | [diff] [blame] | 211 | OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory", |
| 212 | "Look for files with symbols relative to this directory"), |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 213 | OPT_END() |
| 214 | }; |
| 215 | |
| 216 | int cmd_diff(int argc, const char **argv, const char *prefix __used) |
| 217 | { |
Arnaldo Carvalho de Melo | 604c5c9 | 2009-12-16 14:09:53 -0200 | [diff] [blame] | 218 | sort_order = diff__default_sort_order; |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 219 | argc = parse_options(argc, argv, options, diff_usage, 0); |
| 220 | if (argc) { |
| 221 | if (argc > 2) |
| 222 | usage_with_options(diff_usage, options); |
| 223 | if (argc == 2) { |
| 224 | input_old = argv[0]; |
| 225 | input_new = argv[1]; |
| 226 | } else |
| 227 | input_new = argv[0]; |
Zhang, Yanmin | a1645ce | 2010-04-19 13:32:50 +0800 | [diff] [blame] | 228 | } else if (symbol_conf.default_guest_vmlinux_name || |
| 229 | symbol_conf.default_guest_kallsyms) { |
| 230 | input_old = "perf.data.host"; |
| 231 | input_new = "perf.data.guest"; |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 232 | } |
| 233 | |
Arnaldo Carvalho de Melo | c351c28 | 2009-12-16 13:49:27 -0200 | [diff] [blame] | 234 | symbol_conf.exclude_other = false; |
Arnaldo Carvalho de Melo | 655000e | 2009-12-15 20:04:40 -0200 | [diff] [blame] | 235 | if (symbol__init() < 0) |
| 236 | return -1; |
| 237 | |
| 238 | setup_sorting(diff_usage, options); |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 239 | setup_pager(); |
Arnaldo Carvalho de Melo | c351c28 | 2009-12-16 13:49:27 -0200 | [diff] [blame] | 240 | |
| 241 | sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", NULL); |
| 242 | sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", NULL); |
| 243 | sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", NULL); |
| 244 | |
Arnaldo Carvalho de Melo | 86a9eee | 2009-12-14 20:09:31 -0200 | [diff] [blame] | 245 | return __cmd_diff(); |
| 246 | } |