kernel/tools/perf/builtin-mem.c

   1 #include "builtin.h"
   2 #include "perf.h"
   3
   4 #include "util/parse-options.h"
   5 #include "util/trace-event.h"
   6 #include "util/tool.h"
   7 #include "util/session.h"
   8 #include "util/data.h"
   9
  10 #define MEM_OPERATION_LOAD      0x1
  11 #define MEM_OPERATION_STORE     0x2
  12
  13 struct perf_mem {
  14         struct perf_tool        tool;
  15         char const              *input_name;
  16         bool                    hide_unresolved;
  17         bool                    dump_raw;
  18         bool                    force;
  19         int                     operation;
  20         const char              *cpu_list;
  21         DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
  22 };
  23
  24 static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
  25 {
  26         int rec_argc, i = 0, j;
  27         const char **rec_argv;
  28         int ret;
  29
  30         rec_argc = argc + 7; /* max number of arguments */
  31         rec_argv = calloc(rec_argc + 1, sizeof(char *));
  32         if (!rec_argv)
  33                 return -1;
  34
  35         rec_argv[i++] = "record";
  36
  37         if (mem->operation & MEM_OPERATION_LOAD)
  38                 rec_argv[i++] = "-W";
  39
  40         rec_argv[i++] = "-d";
  41
  42         if (mem->operation & MEM_OPERATION_LOAD) {
  43                 rec_argv[i++] = "-e";
  44                 rec_argv[i++] = "cpu/mem-loads/pp";
  45         }
  46
  47         if (mem->operation & MEM_OPERATION_STORE) {
  48                 rec_argv[i++] = "-e";
  49                 rec_argv[i++] = "cpu/mem-stores/pp";
  50         }
  51
  52         for (j = 1; j < argc; j++, i++)
  53                 rec_argv[i] = argv[j];
  54
  55         ret = cmd_record(i, rec_argv, NULL);
  56         free(rec_argv);
  57         return ret;
  58 }
  59
  60 static int
  61 dump_raw_samples(struct perf_tool *tool,
  62                  union perf_event *event,
  63                  struct perf_sample *sample,
  64                  struct machine *machine)
  65 {
  66         struct perf_mem *mem = container_of(tool, struct perf_mem, tool);
  67         struct addr_location al;
  68         const char *fmt;
  69
  70         if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
  71                 fprintf(stderr, "problem processing %d event, skipping it.\n",
  72                                 event->header.type);
  73                 return -1;
  74         }
  75
  76         if (al.filtered || (mem->hide_unresolved && al.sym == NULL))
  77                 goto out_put;
  78
  79         if (al.map != NULL)
  80                 al.map->dso->hit = 1;
  81
  82         if (symbol_conf.field_sep) {
  83                 fmt = "%d%s%d%s0x%"PRIx64"%s0x%"PRIx64"%s%"PRIu64
  84                       "%s0x%"PRIx64"%s%s:%s\n";
  85         } else {
  86                 fmt = "%5d%s%5d%s0x%016"PRIx64"%s0x016%"PRIx64
  87                       "%s%5"PRIu64"%s0x%06"PRIx64"%s%s:%s\n";
  88                 symbol_conf.field_sep = " ";
  89         }
  90
  91         printf(fmt,
  92                 sample->pid,
  93                 symbol_conf.field_sep,
  94                 sample->tid,
  95                 symbol_conf.field_sep,
  96                 sample->ip,
  97                 symbol_conf.field_sep,
  98                 sample->addr,
  99                 symbol_conf.field_sep,
 100                 sample->weight,
 101                 symbol_conf.field_sep,
 102                 sample->data_src,
 103                 symbol_conf.field_sep,
 104                 al.map ? (al.map->dso ? al.map->dso->long_name : "???") : "???",
 105                 al.sym ? al.sym->name : "???");
 106 out_put:
 107         addr_location__put(&al);
 108         return 0;
 109 }
 110
 111 static int process_sample_event(struct perf_tool *tool,
 112                                 union perf_event *event,
 113                                 struct perf_sample *sample,
 114                                 struct perf_evsel *evsel __maybe_unused,
 115                                 struct machine *machine)
 116 {
 117         return dump_raw_samples(tool, event, sample, machine);
 118 }
 119
 120 static int report_raw_events(struct perf_mem *mem)
 121 {
 122         struct perf_data_file file = {
 123                 .path = input_name,
 124                 .mode = PERF_DATA_MODE_READ,
 125                 .force = mem->force,
 126         };
 127         int ret;
 128         struct perf_session *session = perf_session__new(&file, false,
 129                                                          &mem->tool);
 130
 131         if (session == NULL)
 132                 return -1;
 133
 134         if (mem->cpu_list) {
 135                 ret = perf_session__cpu_bitmap(session, mem->cpu_list,
 136                                                mem->cpu_bitmap);
 137                 if (ret < 0)
 138                         goto out_delete;
 139         }
 140
 141         ret = symbol__init(&session->header.env);
 142         if (ret < 0)
 143                 goto out_delete;
 144
 145         printf("# PID, TID, IP, ADDR, LOCAL WEIGHT, DSRC, SYMBOL\n");
 146
 147         ret = perf_session__process_events(session);
 148
 149 out_delete:
 150         perf_session__delete(session);
 151         return ret;
 152 }
 153
 154 static int report_events(int argc, const char **argv, struct perf_mem *mem)
 155 {
 156         const char **rep_argv;
 157         int ret, i = 0, j, rep_argc;
 158
 159         if (mem->dump_raw)
 160                 return report_raw_events(mem);
 161
 162         rep_argc = argc + 3;
 163         rep_argv = calloc(rep_argc + 1, sizeof(char *));
 164         if (!rep_argv)
 165                 return -1;
 166
 167         rep_argv[i++] = "report";
 168         rep_argv[i++] = "--mem-mode";
 169         rep_argv[i++] = "-n"; /* display number of samples */
 170
 171         /*
 172          * there is no weight (cost) associated with stores, so don't print
 173          * the column
 174          */
 175         if (!(mem->operation & MEM_OPERATION_LOAD))
 176                 rep_argv[i++] = "--sort=mem,sym,dso,symbol_daddr,"
 177                                 "dso_daddr,tlb,locked";
 178
 179         for (j = 1; j < argc; j++, i++)
 180                 rep_argv[i] = argv[j];
 181
 182         ret = cmd_report(i, rep_argv, NULL);
 183         free(rep_argv);
 184         return ret;
 185 }
 186
 187 struct mem_mode {
 188         const char *name;
 189         int mode;
 190 };
 191
 192 #define MEM_OPT(n, m) \
 193         { .name = n, .mode = (m) }
 194
 195 #define MEM_END { .name = NULL }
 196
 197 static const struct mem_mode mem_modes[]={
 198         MEM_OPT("load", MEM_OPERATION_LOAD),
 199         MEM_OPT("store", MEM_OPERATION_STORE),
 200         MEM_END
 201 };
 202
 203 static int
 204 parse_mem_ops(const struct option *opt, const char *str, int unset)
 205 {
 206         int *mode = (int *)opt->value;
 207         const struct mem_mode *m;
 208         char *s, *os = NULL, *p;
 209         int ret = -1;
 210
 211         if (unset)
 212                 return 0;
 213
 214         /* str may be NULL in case no arg is passed to -t */
 215         if (str) {
 216                 /* because str is read-only */
 217                 s = os = strdup(str);
 218                 if (!s)
 219                         return -1;
 220
 221                 /* reset mode */
 222                 *mode = 0;
 223
 224                 for (;;) {
 225                         p = strchr(s, ',');
 226                         if (p)
 227                                 *p = '\0';
 228
 229                         for (m = mem_modes; m->name; m++) {
 230                                 if (!strcasecmp(s, m->name))
 231                                         break;
 232                         }
 233                         if (!m->name) {
 234                                 fprintf(stderr, "unknown sampling op %s,"
 235                                             " check man page\n", s);
 236                                 goto error;
 237                         }
 238
 239                         *mode |= m->mode;
 240
 241                         if (!p)
 242                                 break;
 243
 244                         s = p + 1;
 245                 }
 246         }
 247         ret = 0;
 248
 249         if (*mode == 0)
 250                 *mode = MEM_OPERATION_LOAD;
 251 error:
 252         free(os);
 253         return ret;
 254 }
 255
 256 int cmd_mem(int argc, const char **argv, const char *prefix __maybe_unused)
 257 {
 258         struct stat st;
 259         struct perf_mem mem = {
 260                 .tool = {
 261                         .sample         = process_sample_event,
 262                         .mmap           = perf_event__process_mmap,
 263                         .mmap2          = perf_event__process_mmap2,
 264                         .comm           = perf_event__process_comm,
 265                         .lost           = perf_event__process_lost,
 266                         .fork           = perf_event__process_fork,
 267                         .build_id       = perf_event__process_build_id,
 268                         .ordered_events = true,
 269                 },
 270                 .input_name              = "perf.data",
 271                 /*
 272                  * default to both load an store sampling
 273                  */
 274                 .operation               = MEM_OPERATION_LOAD | MEM_OPERATION_STORE,
 275         };
 276         const struct option mem_options[] = {
 277         OPT_CALLBACK('t', "type", &mem.operation,
 278                    "type", "memory operations(load,store) Default load,store",
 279                     parse_mem_ops),
 280         OPT_BOOLEAN('D', "dump-raw-samples", &mem.dump_raw,
 281                     "dump raw samples in ASCII"),
 282         OPT_BOOLEAN('U', "hide-unresolved", &mem.hide_unresolved,
 283                     "Only display entries resolved to a symbol"),
 284         OPT_STRING('i', "input", &input_name, "file",
 285                    "input file name"),
 286         OPT_STRING('C', "cpu", &mem.cpu_list, "cpu",
 287                    "list of cpus to profile"),
 288         OPT_STRING_NOEMPTY('x', "field-separator", &symbol_conf.field_sep,
 289                    "separator",
 290                    "separator for columns, no spaces will be added"
 291                    " between columns '.' is reserved."),
 292         OPT_BOOLEAN('f', "force", &mem.force, "don't complain, do it"),
 293         OPT_END()
 294         };
 295         const char *const mem_subcommands[] = { "record", "report", NULL };
 296         const char *mem_usage[] = {
 297                 NULL,
 298                 NULL
 299         };
 300
 301
 302         argc = parse_options_subcommand(argc, argv, mem_options, mem_subcommands,
 303                                         mem_usage, PARSE_OPT_STOP_AT_NON_OPTION);
 304
 305         if (!argc || !(strncmp(argv[0], "rec", 3) || mem.operation))
 306                 usage_with_options(mem_usage, mem_options);
 307
 308         if (!mem.input_name || !strlen(mem.input_name)) {
 309                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
 310                         mem.input_name = "-";
 311                 else
 312                         mem.input_name = "perf.data";
 313         }
 314
 315         if (!strncmp(argv[0], "rec", 3))
 316                 return __cmd_record(argc, argv, &mem);
 317         else if (!strncmp(argv[0], "rep", 3))
 318                 return report_events(argc, argv, &mem);
 319         else
 320                 usage_with_options(mem_usage, mem_options);
 321
 322         return 0;
 323 }