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" |
86a9eee0 | 13 | #include "util/session.h" |
45694aa7 | 14 | #include "util/tool.h" |
86a9eee0 ACM |
15 | #include "util/sort.h" |
16 | #include "util/symbol.h" | |
17 | #include "util/util.h" | |
18 | ||
19 | #include <stdlib.h> | |
20 | ||
c351c281 ACM |
21 | static char const *input_old = "perf.data.old", |
22 | *input_new = "perf.data"; | |
604c5c92 | 23 | static char diff__default_sort_order[] = "dso,symbol"; |
c0555642 | 24 | static bool force; |
c351c281 | 25 | static bool show_displacement; |
86a9eee0 | 26 | |
4bf9ce1b JO |
27 | struct perf_diff { |
28 | struct perf_tool tool; | |
29 | struct perf_session *session; | |
30 | }; | |
31 | ||
1c02c4d2 | 32 | static int hists__add_entry(struct hists *self, |
c82ee828 | 33 | struct addr_location *al, u64 period) |
86a9eee0 | 34 | { |
c82ee828 | 35 | if (__hists__add_entry(self, al, NULL, period) != NULL) |
28e2a106 ACM |
36 | return 0; |
37 | return -ENOMEM; | |
86a9eee0 ACM |
38 | } |
39 | ||
4bf9ce1b | 40 | static int diff__process_sample_event(struct perf_tool *tool, |
d20deb64 | 41 | union perf_event *event, |
8d50e5b4 | 42 | struct perf_sample *sample, |
9e69c210 | 43 | struct perf_evsel *evsel __used, |
743eb868 | 44 | struct machine *machine) |
86a9eee0 | 45 | { |
4bf9ce1b JO |
46 | struct perf_diff *_diff = container_of(tool, struct perf_diff, tool); |
47 | struct perf_session *session = _diff->session; | |
86a9eee0 | 48 | struct addr_location al; |
86a9eee0 | 49 | |
743eb868 | 50 | if (perf_event__preprocess_sample(event, machine, &al, sample, NULL) < 0) { |
86a9eee0 ACM |
51 | pr_warning("problem processing %d event, skipping it.\n", |
52 | event->header.type); | |
53 | return -1; | |
54 | } | |
55 | ||
cdbae314 | 56 | if (al.filtered || al.sym == NULL) |
c410a338 ACM |
57 | return 0; |
58 | ||
4bf9ce1b | 59 | if (hists__add_entry(&session->hists, &al, sample->period)) { |
c82ee828 | 60 | pr_warning("problem incrementing symbol period, skipping event\n"); |
86a9eee0 ACM |
61 | return -1; |
62 | } | |
63 | ||
4bf9ce1b | 64 | session->hists.stats.total_period += sample->period; |
86a9eee0 ACM |
65 | return 0; |
66 | } | |
67 | ||
4bf9ce1b JO |
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 | }, | |
86a9eee0 ACM |
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) { | |
86a9eee0 ACM |
89 | parent = *p; |
90 | iter = rb_entry(parent, struct hist_entry, rb_node); | |
9c443dfd | 91 | if (hist_entry__cmp(he, iter) < 0) |
86a9eee0 | 92 | p = &(*p)->rb_left; |
9c443dfd | 93 | else |
86a9eee0 | 94 | p = &(*p)->rb_right; |
86a9eee0 ACM |
95 | } |
96 | ||
97 | rb_link_node(&he->rb_node, parent, p); | |
98 | rb_insert_color(&he->rb_node, root); | |
99 | } | |
100 | ||
1c02c4d2 | 101 | static void hists__resort_entries(struct hists *self) |
86a9eee0 ACM |
102 | { |
103 | unsigned long position = 1; | |
104 | struct rb_root tmp = RB_ROOT; | |
1c02c4d2 | 105 | struct rb_node *next = rb_first(&self->entries); |
86a9eee0 ACM |
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); | |
1c02c4d2 | 111 | rb_erase(&n->rb_node, &self->entries); |
86a9eee0 ACM |
112 | n->position = position++; |
113 | perf_session__insert_hist_entry_by_name(&tmp, n); | |
114 | } | |
115 | ||
1c02c4d2 | 116 | self->entries = tmp; |
86a9eee0 ACM |
117 | } |
118 | ||
1c02c4d2 ACM |
119 | static struct hist_entry *hists__find_entry(struct hists *self, |
120 | struct hist_entry *he) | |
86a9eee0 | 121 | { |
1c02c4d2 | 122 | struct rb_node *n = self->entries.rb_node; |
86a9eee0 ACM |
123 | |
124 | while (n) { | |
125 | struct hist_entry *iter = rb_entry(n, struct hist_entry, rb_node); | |
9c443dfd | 126 | int64_t cmp = hist_entry__cmp(he, iter); |
86a9eee0 | 127 | |
9c443dfd | 128 | if (cmp < 0) |
86a9eee0 | 129 | n = n->rb_left; |
9c443dfd | 130 | else if (cmp > 0) |
86a9eee0 | 131 | n = n->rb_right; |
9c443dfd ACM |
132 | else |
133 | return iter; | |
86a9eee0 ACM |
134 | } |
135 | ||
136 | return NULL; | |
137 | } | |
138 | ||
1c02c4d2 | 139 | static void hists__match(struct hists *older, struct hists *newer) |
86a9eee0 ACM |
140 | { |
141 | struct rb_node *nd; | |
142 | ||
1c02c4d2 | 143 | for (nd = rb_first(&newer->entries); nd; nd = rb_next(nd)) { |
86a9eee0 | 144 | struct hist_entry *pos = rb_entry(nd, struct hist_entry, rb_node); |
1c02c4d2 | 145 | pos->pair = hists__find_entry(older, pos); |
86a9eee0 ACM |
146 | } |
147 | } | |
148 | ||
86a9eee0 ACM |
149 | static int __cmd_diff(void) |
150 | { | |
151 | int ret, i; | |
4bf9ce1b JO |
152 | #define older (session[0]) |
153 | #define newer (session[1]) | |
86a9eee0 ACM |
154 | struct perf_session *session[2]; |
155 | ||
4bf9ce1b JO |
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); | |
86a9eee0 ACM |
160 | if (session[0] == NULL || session[1] == NULL) |
161 | return -ENOMEM; | |
162 | ||
163 | for (i = 0; i < 2; ++i) { | |
4bf9ce1b JO |
164 | diff.session = session[i]; |
165 | ret = perf_session__process_events(session[i], &diff.tool); | |
86a9eee0 ACM |
166 | if (ret) |
167 | goto out_delete; | |
4bf9ce1b | 168 | hists__output_resort(&session[i]->hists); |
86a9eee0 ACM |
169 | } |
170 | ||
9c443dfd | 171 | if (show_displacement) |
4bf9ce1b | 172 | hists__resort_entries(&older->hists); |
9c443dfd | 173 | |
4bf9ce1b JO |
174 | hists__match(&older->hists, &newer->hists); |
175 | hists__fprintf(&newer->hists, &older->hists, | |
ef9dfe6e | 176 | show_displacement, true, 0, 0, stdout); |
86a9eee0 ACM |
177 | out_delete: |
178 | for (i = 0; i < 2; ++i) | |
179 | perf_session__delete(session[i]); | |
180 | return ret; | |
4bf9ce1b JO |
181 | #undef older |
182 | #undef newer | |
86a9eee0 ACM |
183 | } |
184 | ||
0422a4fc | 185 | static const char * const diff_usage[] = { |
86a9eee0 | 186 | "perf diff [<options>] [old_file] [new_file]", |
0422a4fc | 187 | NULL, |
86a9eee0 ACM |
188 | }; |
189 | ||
190 | static const struct option options[] = { | |
c0555642 | 191 | OPT_INCR('v', "verbose", &verbose, |
86a9eee0 | 192 | "be more verbose (show symbol address, etc)"), |
34295559 | 193 | OPT_BOOLEAN('M', "displacement", &show_displacement, |
c351c281 | 194 | "Show position displacement relative to baseline"), |
86a9eee0 ACM |
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"), | |
c410a338 ACM |
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"), | |
c351c281 ACM |
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."), | |
ec5761ea DA |
211 | OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory", |
212 | "Look for files with symbols relative to this directory"), | |
86a9eee0 ACM |
213 | OPT_END() |
214 | }; | |
215 | ||
216 | int cmd_diff(int argc, const char **argv, const char *prefix __used) | |
217 | { | |
604c5c92 | 218 | sort_order = diff__default_sort_order; |
86a9eee0 ACM |
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]; | |
a1645ce1 ZY |
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"; | |
86a9eee0 ACM |
232 | } |
233 | ||
c351c281 | 234 | symbol_conf.exclude_other = false; |
655000e7 ACM |
235 | if (symbol__init() < 0) |
236 | return -1; | |
237 | ||
238 | setup_sorting(diff_usage, options); | |
86a9eee0 | 239 | setup_pager(); |
c351c281 ACM |
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 | ||
86a9eee0 ACM |
245 | return __cmd_diff(); |
246 | } |