Commit | Line | Data |
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86a9eee0 ACM |
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" | |
743eb868 | 12 | #include "util/evsel.h" |
863e451f | 13 | #include "util/evlist.h" |
86a9eee0 | 14 | #include "util/session.h" |
45694aa7 | 15 | #include "util/tool.h" |
86a9eee0 ACM |
16 | #include "util/sort.h" |
17 | #include "util/symbol.h" | |
18 | #include "util/util.h" | |
19 | ||
20 | #include <stdlib.h> | |
21 | ||
c351c281 ACM |
22 | static char const *input_old = "perf.data.old", |
23 | *input_new = "perf.data"; | |
604c5c92 | 24 | static char diff__default_sort_order[] = "dso,symbol"; |
c0555642 | 25 | static bool force; |
c351c281 | 26 | static bool show_displacement; |
86a9eee0 | 27 | |
1c02c4d2 | 28 | static int hists__add_entry(struct hists *self, |
c82ee828 | 29 | struct addr_location *al, u64 period) |
86a9eee0 | 30 | { |
c82ee828 | 31 | if (__hists__add_entry(self, al, NULL, period) != NULL) |
28e2a106 ACM |
32 | return 0; |
33 | return -ENOMEM; | |
86a9eee0 ACM |
34 | } |
35 | ||
1d037ca1 | 36 | static int diff__process_sample_event(struct perf_tool *tool __maybe_unused, |
d20deb64 | 37 | union perf_event *event, |
8d50e5b4 | 38 | struct perf_sample *sample, |
863e451f | 39 | struct perf_evsel *evsel, |
743eb868 | 40 | struct machine *machine) |
86a9eee0 ACM |
41 | { |
42 | struct addr_location al; | |
86a9eee0 | 43 | |
743eb868 | 44 | if (perf_event__preprocess_sample(event, machine, &al, sample, NULL) < 0) { |
86a9eee0 ACM |
45 | pr_warning("problem processing %d event, skipping it.\n", |
46 | event->header.type); | |
47 | return -1; | |
48 | } | |
49 | ||
cdbae314 | 50 | if (al.filtered || al.sym == NULL) |
c410a338 ACM |
51 | return 0; |
52 | ||
863e451f | 53 | if (hists__add_entry(&evsel->hists, &al, sample->period)) { |
c82ee828 | 54 | pr_warning("problem incrementing symbol period, skipping event\n"); |
86a9eee0 ACM |
55 | return -1; |
56 | } | |
57 | ||
863e451f | 58 | evsel->hists.stats.total_period += sample->period; |
86a9eee0 ACM |
59 | return 0; |
60 | } | |
61 | ||
863e451f JO |
62 | static struct perf_tool tool = { |
63 | .sample = diff__process_sample_event, | |
64 | .mmap = perf_event__process_mmap, | |
65 | .comm = perf_event__process_comm, | |
66 | .exit = perf_event__process_task, | |
67 | .fork = perf_event__process_task, | |
68 | .lost = perf_event__process_lost, | |
69 | .ordered_samples = true, | |
70 | .ordering_requires_timestamps = true, | |
86a9eee0 ACM |
71 | }; |
72 | ||
73 | static void perf_session__insert_hist_entry_by_name(struct rb_root *root, | |
74 | struct hist_entry *he) | |
75 | { | |
76 | struct rb_node **p = &root->rb_node; | |
77 | struct rb_node *parent = NULL; | |
78 | struct hist_entry *iter; | |
79 | ||
80 | while (*p != NULL) { | |
86a9eee0 ACM |
81 | parent = *p; |
82 | iter = rb_entry(parent, struct hist_entry, rb_node); | |
9c443dfd | 83 | if (hist_entry__cmp(he, iter) < 0) |
86a9eee0 | 84 | p = &(*p)->rb_left; |
9c443dfd | 85 | else |
86a9eee0 | 86 | p = &(*p)->rb_right; |
86a9eee0 ACM |
87 | } |
88 | ||
89 | rb_link_node(&he->rb_node, parent, p); | |
90 | rb_insert_color(&he->rb_node, root); | |
91 | } | |
92 | ||
1c02c4d2 | 93 | static void hists__resort_entries(struct hists *self) |
86a9eee0 ACM |
94 | { |
95 | unsigned long position = 1; | |
96 | struct rb_root tmp = RB_ROOT; | |
1c02c4d2 | 97 | struct rb_node *next = rb_first(&self->entries); |
86a9eee0 ACM |
98 | |
99 | while (next != NULL) { | |
100 | struct hist_entry *n = rb_entry(next, struct hist_entry, rb_node); | |
101 | ||
102 | next = rb_next(&n->rb_node); | |
1c02c4d2 | 103 | rb_erase(&n->rb_node, &self->entries); |
86a9eee0 ACM |
104 | n->position = position++; |
105 | perf_session__insert_hist_entry_by_name(&tmp, n); | |
106 | } | |
107 | ||
1c02c4d2 | 108 | self->entries = tmp; |
86a9eee0 ACM |
109 | } |
110 | ||
1c02c4d2 ACM |
111 | static struct hist_entry *hists__find_entry(struct hists *self, |
112 | struct hist_entry *he) | |
86a9eee0 | 113 | { |
1c02c4d2 | 114 | struct rb_node *n = self->entries.rb_node; |
86a9eee0 ACM |
115 | |
116 | while (n) { | |
117 | struct hist_entry *iter = rb_entry(n, struct hist_entry, rb_node); | |
9c443dfd | 118 | int64_t cmp = hist_entry__cmp(he, iter); |
86a9eee0 | 119 | |
9c443dfd | 120 | if (cmp < 0) |
86a9eee0 | 121 | n = n->rb_left; |
9c443dfd | 122 | else if (cmp > 0) |
86a9eee0 | 123 | n = n->rb_right; |
9c443dfd ACM |
124 | else |
125 | return iter; | |
86a9eee0 ACM |
126 | } |
127 | ||
128 | return NULL; | |
129 | } | |
130 | ||
1c02c4d2 | 131 | static void hists__match(struct hists *older, struct hists *newer) |
86a9eee0 ACM |
132 | { |
133 | struct rb_node *nd; | |
134 | ||
1c02c4d2 | 135 | for (nd = rb_first(&newer->entries); nd; nd = rb_next(nd)) { |
86a9eee0 | 136 | struct hist_entry *pos = rb_entry(nd, struct hist_entry, rb_node); |
1c02c4d2 | 137 | pos->pair = hists__find_entry(older, pos); |
86a9eee0 ACM |
138 | } |
139 | } | |
140 | ||
863e451f JO |
141 | static struct perf_evsel *evsel_match(struct perf_evsel *evsel, |
142 | struct perf_evlist *evlist) | |
143 | { | |
144 | struct perf_evsel *e; | |
145 | ||
146 | list_for_each_entry(e, &evlist->entries, node) | |
147 | if (perf_evsel__match2(evsel, e)) | |
148 | return e; | |
149 | ||
150 | return NULL; | |
151 | } | |
152 | ||
86a9eee0 ACM |
153 | static int __cmd_diff(void) |
154 | { | |
155 | int ret, i; | |
4bf9ce1b JO |
156 | #define older (session[0]) |
157 | #define newer (session[1]) | |
86a9eee0 | 158 | struct perf_session *session[2]; |
863e451f JO |
159 | struct perf_evlist *evlist_new, *evlist_old; |
160 | struct perf_evsel *evsel; | |
161 | bool first = true; | |
86a9eee0 | 162 | |
4bf9ce1b | 163 | older = perf_session__new(input_old, O_RDONLY, force, false, |
863e451f | 164 | &tool); |
4bf9ce1b | 165 | newer = perf_session__new(input_new, O_RDONLY, force, false, |
863e451f | 166 | &tool); |
86a9eee0 ACM |
167 | if (session[0] == NULL || session[1] == NULL) |
168 | return -ENOMEM; | |
169 | ||
170 | for (i = 0; i < 2; ++i) { | |
863e451f | 171 | ret = perf_session__process_events(session[i], &tool); |
86a9eee0 ACM |
172 | if (ret) |
173 | goto out_delete; | |
86a9eee0 ACM |
174 | } |
175 | ||
863e451f JO |
176 | evlist_old = older->evlist; |
177 | evlist_new = newer->evlist; | |
178 | ||
179 | list_for_each_entry(evsel, &evlist_new->entries, node) | |
180 | hists__output_resort(&evsel->hists); | |
181 | ||
182 | list_for_each_entry(evsel, &evlist_old->entries, node) { | |
183 | hists__output_resort(&evsel->hists); | |
184 | ||
185 | if (show_displacement) | |
186 | hists__resort_entries(&evsel->hists); | |
187 | } | |
188 | ||
189 | list_for_each_entry(evsel, &evlist_new->entries, node) { | |
190 | struct perf_evsel *evsel_old; | |
191 | ||
192 | evsel_old = evsel_match(evsel, evlist_old); | |
193 | if (!evsel_old) | |
194 | continue; | |
195 | ||
196 | fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n", | |
197 | perf_evsel__name(evsel)); | |
198 | ||
199 | first = false; | |
200 | ||
201 | hists__match(&evsel_old->hists, &evsel->hists); | |
202 | hists__fprintf(&evsel->hists, &evsel_old->hists, | |
203 | show_displacement, true, 0, 0, stdout); | |
204 | } | |
9c443dfd | 205 | |
86a9eee0 ACM |
206 | out_delete: |
207 | for (i = 0; i < 2; ++i) | |
208 | perf_session__delete(session[i]); | |
209 | return ret; | |
4bf9ce1b JO |
210 | #undef older |
211 | #undef newer | |
86a9eee0 ACM |
212 | } |
213 | ||
0422a4fc | 214 | static const char * const diff_usage[] = { |
86a9eee0 | 215 | "perf diff [<options>] [old_file] [new_file]", |
0422a4fc | 216 | NULL, |
86a9eee0 ACM |
217 | }; |
218 | ||
219 | static const struct option options[] = { | |
c0555642 | 220 | OPT_INCR('v', "verbose", &verbose, |
86a9eee0 | 221 | "be more verbose (show symbol address, etc)"), |
34295559 | 222 | OPT_BOOLEAN('M', "displacement", &show_displacement, |
c351c281 | 223 | "Show position displacement relative to baseline"), |
86a9eee0 ACM |
224 | OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, |
225 | "dump raw trace in ASCII"), | |
226 | OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), | |
227 | OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules, | |
228 | "load module symbols - WARNING: use only with -k and LIVE kernel"), | |
c410a338 ACM |
229 | OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]", |
230 | "only consider symbols in these dsos"), | |
231 | OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]", | |
232 | "only consider symbols in these comms"), | |
233 | OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]", | |
234 | "only consider these symbols"), | |
c351c281 ACM |
235 | OPT_STRING('s', "sort", &sort_order, "key[,key2...]", |
236 | "sort by key(s): pid, comm, dso, symbol, parent"), | |
237 | OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator", | |
238 | "separator for columns, no spaces will be added between " | |
239 | "columns '.' is reserved."), | |
ec5761ea DA |
240 | OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory", |
241 | "Look for files with symbols relative to this directory"), | |
86a9eee0 ACM |
242 | OPT_END() |
243 | }; | |
244 | ||
1d037ca1 | 245 | int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused) |
86a9eee0 | 246 | { |
604c5c92 | 247 | sort_order = diff__default_sort_order; |
86a9eee0 ACM |
248 | argc = parse_options(argc, argv, options, diff_usage, 0); |
249 | if (argc) { | |
250 | if (argc > 2) | |
251 | usage_with_options(diff_usage, options); | |
252 | if (argc == 2) { | |
253 | input_old = argv[0]; | |
254 | input_new = argv[1]; | |
255 | } else | |
256 | input_new = argv[0]; | |
a1645ce1 ZY |
257 | } else if (symbol_conf.default_guest_vmlinux_name || |
258 | symbol_conf.default_guest_kallsyms) { | |
259 | input_old = "perf.data.host"; | |
260 | input_new = "perf.data.guest"; | |
86a9eee0 ACM |
261 | } |
262 | ||
c351c281 | 263 | symbol_conf.exclude_other = false; |
655000e7 ACM |
264 | if (symbol__init() < 0) |
265 | return -1; | |
266 | ||
ea251d51 | 267 | perf_hpp__init(true, show_displacement); |
655000e7 | 268 | setup_sorting(diff_usage, options); |
86a9eee0 | 269 | setup_pager(); |
c351c281 ACM |
270 | |
271 | sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", NULL); | |
272 | sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", NULL); | |
273 | sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", NULL); | |
274 | ||
86a9eee0 ACM |
275 | return __cmd_diff(); |
276 | } |