tools/perf/util/evsel.h

   1 #ifndef __PERF_EVSEL_H
   2 #define __PERF_EVSEL_H 1
   3
   4 #include <linux/list.h>
   5 #include <stdbool.h>
   6 #include <stddef.h>
   7 #include <linux/perf_event.h>
   8 #include <linux/types.h>
   9 #include "xyarray.h"
  10 #include "symbol.h"
  11 #include "cpumap.h"
  12 #include "counts.h"
  13
  14 struct perf_evsel;
  15
  16 /*
  17  * Per fd, to map back from PERF_SAMPLE_ID to evsel, only used when there are
  18  * more than one entry in the evlist.
  19  */
  20 struct perf_sample_id {
  21         struct hlist_node       node;
  22         u64                     id;
  23         struct perf_evsel       *evsel;
  24         int                     idx;
  25         int                     cpu;
  26         pid_t                   tid;
  27
  28         /* Holds total ID period value for PERF_SAMPLE_READ processing. */
  29         u64                     period;
  30 };
  31
  32 struct cgroup_sel;
  33
  34 /*
  35  * The 'struct perf_evsel_config_term' is used to pass event
  36  * specific configuration data to perf_evsel__config routine.
  37  * It is allocated within event parsing and attached to
  38  * perf_evsel::config_terms list head.
  39 */
  40 enum {
  41         PERF_EVSEL__CONFIG_TERM_PERIOD,
  42         PERF_EVSEL__CONFIG_TERM_FREQ,
  43         PERF_EVSEL__CONFIG_TERM_TIME,
  44         PERF_EVSEL__CONFIG_TERM_CALLGRAPH,
  45         PERF_EVSEL__CONFIG_TERM_STACK_USER,
  46         PERF_EVSEL__CONFIG_TERM_INHERIT,
  47         PERF_EVSEL__CONFIG_TERM_MAX,
  48 };
  49
  50 struct perf_evsel_config_term {
  51         struct list_head        list;
  52         int     type;
  53         union {
  54                 u64     period;
  55                 u64     freq;
  56                 bool    time;
  57                 char    *callgraph;
  58                 u64     stack_user;
  59                 bool    inherit;
  60         } val;
  61 };
  62
  63 /** struct perf_evsel - event selector
  64  *
  65  * @evlist - evlist this evsel is in, if it is in one.
  66  * @node - To insert it into evlist->entries or in other list_heads, say in
  67  *         the event parsing routines.
  68  * @name - Can be set to retain the original event name passed by the user,
  69  *         so that when showing results in tools such as 'perf stat', we
  70  *         show the name used, not some alias.
  71  * @id_pos: the position of the event id (PERF_SAMPLE_ID or
  72  *          PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of
  73  *          struct sample_event
  74  * @is_pos: the position (counting backwards) of the event id (PERF_SAMPLE_ID or
  75  *          PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if sample_id_all
  76  *          is used there is an id sample appended to non-sample events
  77  * @priv:   And what is in its containing unnamed union are tool specific
  78  */
  79 struct perf_evsel {
  80         struct list_head        node;
  81         struct perf_evlist      *evlist;
  82         struct perf_event_attr  attr;
  83         char                    *filter;
  84         struct xyarray          *fd;
  85         struct xyarray          *sample_id;
  86         u64                     *id;
  87         struct perf_counts      *counts;
  88         struct perf_counts      *prev_raw_counts;
  89         int                     idx;
  90         u32                     ids;
  91         char                    *name;
  92         double                  scale;
  93         const char              *unit;
  94         struct event_format     *tp_format;
  95         off_t                   id_offset;
  96         union {
  97                 void            *priv;
  98                 u64             db_id;
  99         };
 100         struct cgroup_sel       *cgrp;
 101         void                    *handler;
 102         struct cpu_map          *cpus;
 103         struct cpu_map          *own_cpus;
 104         struct thread_map       *threads;
 105         unsigned int            sample_size;
 106         int                     id_pos;
 107         int                     is_pos;
 108         bool                    snapshot;
 109         bool                    supported;
 110         bool                    needs_swap;
 111         bool                    no_aux_samples;
 112         bool                    immediate;
 113         bool                    system_wide;
 114         bool                    tracking;
 115         bool                    per_pkg;
 116         bool                    precise_max;
 117         /* parse modifier helper */
 118         int                     exclude_GH;
 119         int                     nr_members;
 120         int                     sample_read;
 121         unsigned long           *per_pkg_mask;
 122         struct perf_evsel       *leader;
 123         char                    *group_name;
 124         bool                    cmdline_group_boundary;
 125         struct list_head        config_terms;
 126         int                     bpf_fd;
 127 };
 128
 129 union u64_swap {
 130         u64 val64;
 131         u32 val32[2];
 132 };
 133
 134 struct cpu_map;
 135 struct target;
 136 struct thread_map;
 137 struct record_opts;
 138
 139 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
 140 {
 141         return evsel->cpus;
 142 }
 143
 144 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
 145 {
 146         return perf_evsel__cpus(evsel)->nr;
 147 }
 148
 149 void perf_counts_values__scale(struct perf_counts_values *count,
 150                                bool scale, s8 *pscaled);
 151
 152 void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu, int thread,
 153                                 struct perf_counts_values *count);
 154
 155 int perf_evsel__object_config(size_t object_size,
 156                               int (*init)(struct perf_evsel *evsel),
 157                               void (*fini)(struct perf_evsel *evsel));
 158
 159 struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx);
 160
 161 static inline struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr)
 162 {
 163         return perf_evsel__new_idx(attr, 0);
 164 }
 165
 166 struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx);
 167
 168 /*
 169  * Returns pointer with encoded error via <linux/err.h> interface.
 170  */
 171 static inline struct perf_evsel *perf_evsel__newtp(const char *sys, const char *name)
 172 {
 173         return perf_evsel__newtp_idx(sys, name, 0);
 174 }
 175
 176 struct event_format *event_format__new(const char *sys, const char *name);
 177
 178 void perf_evsel__init(struct perf_evsel *evsel,
 179                       struct perf_event_attr *attr, int idx);
 180 void perf_evsel__exit(struct perf_evsel *evsel);
 181 void perf_evsel__delete(struct perf_evsel *evsel);
 182
 183 void perf_evsel__config(struct perf_evsel *evsel,
 184                         struct record_opts *opts);
 185
 186 int __perf_evsel__sample_size(u64 sample_type);
 187 void perf_evsel__calc_id_pos(struct perf_evsel *evsel);
 188
 189 bool perf_evsel__is_cache_op_valid(u8 type, u8 op);
 190
 191 #define PERF_EVSEL__MAX_ALIASES 8
 192
 193 extern const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
 194                                        [PERF_EVSEL__MAX_ALIASES];
 195 extern const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
 196                                           [PERF_EVSEL__MAX_ALIASES];
 197 extern const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
 198                                               [PERF_EVSEL__MAX_ALIASES];
 199 extern const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX];
 200 extern const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX];
 201 int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
 202                                             char *bf, size_t size);
 203 const char *perf_evsel__name(struct perf_evsel *evsel);
 204
 205 const char *perf_evsel__group_name(struct perf_evsel *evsel);
 206 int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size);
 207
 208 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
 209 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
 210
 211 void __perf_evsel__set_sample_bit(struct perf_evsel *evsel,
 212                                   enum perf_event_sample_format bit);
 213 void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel,
 214                                     enum perf_event_sample_format bit);
 215
 216 #define perf_evsel__set_sample_bit(evsel, bit) \
 217         __perf_evsel__set_sample_bit(evsel, PERF_SAMPLE_##bit)
 218
 219 #define perf_evsel__reset_sample_bit(evsel, bit) \
 220         __perf_evsel__reset_sample_bit(evsel, PERF_SAMPLE_##bit)
 221
 222 void perf_evsel__set_sample_id(struct perf_evsel *evsel,
 223                                bool use_sample_identifier);
 224
 225 int perf_evsel__set_filter(struct perf_evsel *evsel, const char *filter);
 226 int perf_evsel__append_filter(struct perf_evsel *evsel,
 227                               const char *op, const char *filter);
 228 int perf_evsel__apply_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
 229                              const char *filter);
 230 int perf_evsel__enable(struct perf_evsel *evsel);
 231 int perf_evsel__disable(struct perf_evsel *evsel);
 232
 233 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
 234                              struct cpu_map *cpus);
 235 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
 236                                 struct thread_map *threads);
 237 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
 238                      struct thread_map *threads);
 239 void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads);
 240
 241 struct perf_sample;
 242
 243 void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
 244                          const char *name);
 245 u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
 246                        const char *name);
 247
 248 static inline char *perf_evsel__strval(struct perf_evsel *evsel,
 249                                        struct perf_sample *sample,
 250                                        const char *name)
 251 {
 252         return perf_evsel__rawptr(evsel, sample, name);
 253 }
 254
 255 struct format_field;
 256
 257 struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name);
 258
 259 #define perf_evsel__match(evsel, t, c)          \
 260         (evsel->attr.type == PERF_TYPE_##t &&   \
 261          evsel->attr.config == PERF_COUNT_##c)
 262
 263 static inline bool perf_evsel__match2(struct perf_evsel *e1,
 264                                       struct perf_evsel *e2)
 265 {
 266         return (e1->attr.type == e2->attr.type) &&
 267                (e1->attr.config == e2->attr.config);
 268 }
 269
 270 #define perf_evsel__cmp(a, b)                   \
 271         ((a) &&                                 \
 272          (b) &&                                 \
 273          (a)->attr.type == (b)->attr.type &&    \
 274          (a)->attr.config == (b)->attr.config)
 275
 276 int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
 277                      struct perf_counts_values *count);
 278
 279 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
 280                               int cpu, int thread, bool scale);
 281
 282 /**
 283  * perf_evsel__read_on_cpu - Read out the results on a CPU and thread
 284  *
 285  * @evsel - event selector to read value
 286  * @cpu - CPU of interest
 287  * @thread - thread of interest
 288  */
 289 static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel,
 290                                           int cpu, int thread)
 291 {
 292         return __perf_evsel__read_on_cpu(evsel, cpu, thread, false);
 293 }
 294
 295 /**
 296  * perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
 297  *
 298  * @evsel - event selector to read value
 299  * @cpu - CPU of interest
 300  * @thread - thread of interest
 301  */
 302 static inline int perf_evsel__read_on_cpu_scaled(struct perf_evsel *evsel,
 303                                                  int cpu, int thread)
 304 {
 305         return __perf_evsel__read_on_cpu(evsel, cpu, thread, true);
 306 }
 307
 308 int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
 309                              struct perf_sample *sample);
 310
 311 static inline struct perf_evsel *perf_evsel__next(struct perf_evsel *evsel)
 312 {
 313         return list_entry(evsel->node.next, struct perf_evsel, node);
 314 }
 315
 316 static inline struct perf_evsel *perf_evsel__prev(struct perf_evsel *evsel)
 317 {
 318         return list_entry(evsel->node.prev, struct perf_evsel, node);
 319 }
 320
 321 /**
 322  * perf_evsel__is_group_leader - Return whether given evsel is a leader event
 323  *
 324  * @evsel - evsel selector to be tested
 325  *
 326  * Return %true if @evsel is a group leader or a stand-alone event
 327  */
 328 static inline bool perf_evsel__is_group_leader(const struct perf_evsel *evsel)
 329 {
 330         return evsel->leader == evsel;
 331 }
 332
 333 /**
 334  * perf_evsel__is_group_event - Return whether given evsel is a group event
 335  *
 336  * @evsel - evsel selector to be tested
 337  *
 338  * Return %true iff event group view is enabled and @evsel is a actual group
 339  * leader which has other members in the group
 340  */
 341 static inline bool perf_evsel__is_group_event(struct perf_evsel *evsel)
 342 {
 343         if (!symbol_conf.event_group)
 344                 return false;
 345
 346         return perf_evsel__is_group_leader(evsel) && evsel->nr_members > 1;
 347 }
 348
 349 /**
 350  * perf_evsel__is_function_event - Return whether given evsel is a function
 351  * trace event
 352  *
 353  * @evsel - evsel selector to be tested
 354  *
 355  * Return %true if event is function trace event
 356  */
 357 static inline bool perf_evsel__is_function_event(struct perf_evsel *evsel)
 358 {
 359 #define FUNCTION_EVENT "ftrace:function"
 360
 361         return evsel->name &&
 362                !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT));
 363
 364 #undef FUNCTION_EVENT
 365 }
 366
 367 struct perf_attr_details {
 368         bool freq;
 369         bool verbose;
 370         bool event_group;
 371         bool force;
 372         bool trace_fields;
 373 };
 374
 375 int perf_evsel__fprintf(struct perf_evsel *evsel,
 376                         struct perf_attr_details *details, FILE *fp);
 377
 378 bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
 379                           char *msg, size_t msgsize);
 380 int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
 381                               int err, char *msg, size_t size);
 382
 383 static inline int perf_evsel__group_idx(struct perf_evsel *evsel)
 384 {
 385         return evsel->idx - evsel->leader->idx;
 386 }
 387
 388 #define for_each_group_member(_evsel, _leader)                                  \
 389 for ((_evsel) = list_entry((_leader)->node.next, struct perf_evsel, node);      \
 390      (_evsel) && (_evsel)->leader == (_leader);                                 \
 391      (_evsel) = list_entry((_evsel)->node.next, struct perf_evsel, node))
 392
 393 static inline bool has_branch_callstack(struct perf_evsel *evsel)
 394 {
 395         return evsel->attr.branch_sample_type & PERF_SAMPLE_BRANCH_CALL_STACK;
 396 }
 397
 398 typedef int (*attr__fprintf_f)(FILE *, const char *, const char *, void *);
 399
 400 int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
 401                              attr__fprintf_f attr__fprintf, void *priv);
 402
 403 #endif /* __PERF_EVSEL_H */