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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" | |
12 | #include "util/session.h" | |
13 | #include "util/sort.h" | |
14 | #include "util/symbol.h" | |
15 | #include "util/util.h" | |
16 | ||
17 | #include <stdlib.h> | |
18 | ||
c351c281 ACM |
19 | static char const *input_old = "perf.data.old", |
20 | *input_new = "perf.data"; | |
604c5c92 | 21 | static char diff__default_sort_order[] = "dso,symbol"; |
c0555642 | 22 | static bool force; |
c351c281 | 23 | static bool show_displacement; |
86a9eee0 | 24 | |
1c02c4d2 | 25 | static int hists__add_entry(struct hists *self, |
c82ee828 | 26 | struct addr_location *al, u64 period) |
86a9eee0 | 27 | { |
c82ee828 | 28 | if (__hists__add_entry(self, al, NULL, period) != NULL) |
28e2a106 ACM |
29 | return 0; |
30 | return -ENOMEM; | |
86a9eee0 ACM |
31 | } |
32 | ||
8115d60c | 33 | static int diff__process_sample_event(union perf_event *event, |
8d50e5b4 | 34 | struct perf_sample *sample, |
640c03ce | 35 | struct perf_session *session) |
86a9eee0 ACM |
36 | { |
37 | struct addr_location al; | |
86a9eee0 | 38 | |
8115d60c | 39 | if (perf_event__preprocess_sample(event, session, &al, sample, NULL) < 0) { |
86a9eee0 ACM |
40 | pr_warning("problem processing %d event, skipping it.\n", |
41 | event->header.type); | |
42 | return -1; | |
43 | } | |
44 | ||
cdbae314 | 45 | if (al.filtered || al.sym == NULL) |
c410a338 ACM |
46 | return 0; |
47 | ||
640c03ce | 48 | if (hists__add_entry(&session->hists, &al, sample->period)) { |
c82ee828 | 49 | pr_warning("problem incrementing symbol period, skipping event\n"); |
86a9eee0 ACM |
50 | return -1; |
51 | } | |
52 | ||
640c03ce | 53 | session->hists.stats.total_period += sample->period; |
86a9eee0 ACM |
54 | return 0; |
55 | } | |
56 | ||
57 | static struct perf_event_ops event_ops = { | |
55aa640f | 58 | .sample = diff__process_sample_event, |
8115d60c ACM |
59 | .mmap = perf_event__process_mmap, |
60 | .comm = perf_event__process_comm, | |
61 | .exit = perf_event__process_task, | |
62 | .fork = perf_event__process_task, | |
63 | .lost = perf_event__process_lost, | |
eac23d1c IM |
64 | .ordered_samples = true, |
65 | .ordering_requires_timestamps = true, | |
86a9eee0 ACM |
66 | }; |
67 | ||
68 | static void perf_session__insert_hist_entry_by_name(struct rb_root *root, | |
69 | struct hist_entry *he) | |
70 | { | |
71 | struct rb_node **p = &root->rb_node; | |
72 | struct rb_node *parent = NULL; | |
73 | struct hist_entry *iter; | |
74 | ||
75 | while (*p != NULL) { | |
86a9eee0 ACM |
76 | parent = *p; |
77 | iter = rb_entry(parent, struct hist_entry, rb_node); | |
9c443dfd | 78 | if (hist_entry__cmp(he, iter) < 0) |
86a9eee0 | 79 | p = &(*p)->rb_left; |
9c443dfd | 80 | else |
86a9eee0 | 81 | p = &(*p)->rb_right; |
86a9eee0 ACM |
82 | } |
83 | ||
84 | rb_link_node(&he->rb_node, parent, p); | |
85 | rb_insert_color(&he->rb_node, root); | |
86 | } | |
87 | ||
1c02c4d2 | 88 | static void hists__resort_entries(struct hists *self) |
86a9eee0 ACM |
89 | { |
90 | unsigned long position = 1; | |
91 | struct rb_root tmp = RB_ROOT; | |
1c02c4d2 | 92 | struct rb_node *next = rb_first(&self->entries); |
86a9eee0 ACM |
93 | |
94 | while (next != NULL) { | |
95 | struct hist_entry *n = rb_entry(next, struct hist_entry, rb_node); | |
96 | ||
97 | next = rb_next(&n->rb_node); | |
1c02c4d2 | 98 | rb_erase(&n->rb_node, &self->entries); |
86a9eee0 ACM |
99 | n->position = position++; |
100 | perf_session__insert_hist_entry_by_name(&tmp, n); | |
101 | } | |
102 | ||
1c02c4d2 | 103 | self->entries = tmp; |
86a9eee0 ACM |
104 | } |
105 | ||
1c02c4d2 | 106 | static void hists__set_positions(struct hists *self) |
9c443dfd | 107 | { |
1c02c4d2 ACM |
108 | hists__output_resort(self); |
109 | hists__resort_entries(self); | |
9c443dfd ACM |
110 | } |
111 | ||
1c02c4d2 ACM |
112 | static struct hist_entry *hists__find_entry(struct hists *self, |
113 | struct hist_entry *he) | |
86a9eee0 | 114 | { |
1c02c4d2 | 115 | struct rb_node *n = self->entries.rb_node; |
86a9eee0 ACM |
116 | |
117 | while (n) { | |
118 | struct hist_entry *iter = rb_entry(n, struct hist_entry, rb_node); | |
9c443dfd | 119 | int64_t cmp = hist_entry__cmp(he, iter); |
86a9eee0 | 120 | |
9c443dfd | 121 | if (cmp < 0) |
86a9eee0 | 122 | n = n->rb_left; |
9c443dfd | 123 | else if (cmp > 0) |
86a9eee0 | 124 | n = n->rb_right; |
9c443dfd ACM |
125 | else |
126 | return iter; | |
86a9eee0 ACM |
127 | } |
128 | ||
129 | return NULL; | |
130 | } | |
131 | ||
1c02c4d2 | 132 | static void hists__match(struct hists *older, struct hists *newer) |
86a9eee0 ACM |
133 | { |
134 | struct rb_node *nd; | |
135 | ||
1c02c4d2 | 136 | for (nd = rb_first(&newer->entries); nd; nd = rb_next(nd)) { |
86a9eee0 | 137 | struct hist_entry *pos = rb_entry(nd, struct hist_entry, rb_node); |
1c02c4d2 | 138 | pos->pair = hists__find_entry(older, pos); |
86a9eee0 ACM |
139 | } |
140 | } | |
141 | ||
86a9eee0 ACM |
142 | static int __cmd_diff(void) |
143 | { | |
144 | int ret, i; | |
145 | struct perf_session *session[2]; | |
146 | ||
21ef97f0 IM |
147 | session[0] = perf_session__new(input_old, O_RDONLY, force, false, &event_ops); |
148 | session[1] = perf_session__new(input_new, O_RDONLY, force, false, &event_ops); | |
86a9eee0 ACM |
149 | if (session[0] == NULL || session[1] == NULL) |
150 | return -ENOMEM; | |
151 | ||
152 | for (i = 0; i < 2; ++i) { | |
153 | ret = perf_session__process_events(session[i], &event_ops); | |
154 | if (ret) | |
155 | goto out_delete; | |
86a9eee0 ACM |
156 | } |
157 | ||
1c02c4d2 | 158 | hists__output_resort(&session[1]->hists); |
9c443dfd | 159 | if (show_displacement) |
1c02c4d2 | 160 | hists__set_positions(&session[0]->hists); |
9c443dfd | 161 | |
1c02c4d2 ACM |
162 | hists__match(&session[0]->hists, &session[1]->hists); |
163 | hists__fprintf(&session[1]->hists, &session[0]->hists, | |
164 | show_displacement, stdout); | |
86a9eee0 ACM |
165 | out_delete: |
166 | for (i = 0; i < 2; ++i) | |
167 | perf_session__delete(session[i]); | |
168 | return ret; | |
169 | } | |
170 | ||
0422a4fc | 171 | static const char * const diff_usage[] = { |
86a9eee0 | 172 | "perf diff [<options>] [old_file] [new_file]", |
0422a4fc | 173 | NULL, |
86a9eee0 ACM |
174 | }; |
175 | ||
176 | static const struct option options[] = { | |
c0555642 | 177 | OPT_INCR('v', "verbose", &verbose, |
86a9eee0 | 178 | "be more verbose (show symbol address, etc)"), |
34295559 | 179 | OPT_BOOLEAN('M', "displacement", &show_displacement, |
c351c281 | 180 | "Show position displacement relative to baseline"), |
86a9eee0 ACM |
181 | OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, |
182 | "dump raw trace in ASCII"), | |
183 | OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), | |
184 | OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules, | |
185 | "load module symbols - WARNING: use only with -k and LIVE kernel"), | |
c410a338 ACM |
186 | OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]", |
187 | "only consider symbols in these dsos"), | |
188 | OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]", | |
189 | "only consider symbols in these comms"), | |
190 | OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]", | |
191 | "only consider these symbols"), | |
c351c281 ACM |
192 | OPT_STRING('s', "sort", &sort_order, "key[,key2...]", |
193 | "sort by key(s): pid, comm, dso, symbol, parent"), | |
194 | OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator", | |
195 | "separator for columns, no spaces will be added between " | |
196 | "columns '.' is reserved."), | |
ec5761ea DA |
197 | OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory", |
198 | "Look for files with symbols relative to this directory"), | |
86a9eee0 ACM |
199 | OPT_END() |
200 | }; | |
201 | ||
202 | int cmd_diff(int argc, const char **argv, const char *prefix __used) | |
203 | { | |
604c5c92 | 204 | sort_order = diff__default_sort_order; |
86a9eee0 ACM |
205 | argc = parse_options(argc, argv, options, diff_usage, 0); |
206 | if (argc) { | |
207 | if (argc > 2) | |
208 | usage_with_options(diff_usage, options); | |
209 | if (argc == 2) { | |
210 | input_old = argv[0]; | |
211 | input_new = argv[1]; | |
212 | } else | |
213 | input_new = argv[0]; | |
a1645ce1 ZY |
214 | } else if (symbol_conf.default_guest_vmlinux_name || |
215 | symbol_conf.default_guest_kallsyms) { | |
216 | input_old = "perf.data.host"; | |
217 | input_new = "perf.data.guest"; | |
86a9eee0 ACM |
218 | } |
219 | ||
c351c281 | 220 | symbol_conf.exclude_other = false; |
655000e7 ACM |
221 | if (symbol__init() < 0) |
222 | return -1; | |
223 | ||
224 | setup_sorting(diff_usage, options); | |
86a9eee0 | 225 | setup_pager(); |
c351c281 ACM |
226 | |
227 | sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", NULL); | |
228 | sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", NULL); | |
229 | sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", NULL); | |
230 | ||
86a9eee0 ACM |
231 | return __cmd_diff(); |
232 | } |