tools/perf/util/kwork.h

   1 #ifndef PERF_UTIL_KWORK_H
   2 #define PERF_UTIL_KWORK_H
   3
   4 #include "util/tool.h"
   5 #include "util/time-utils.h"
   6
   7 #include <linux/bitmap.h>
   8 #include <linux/list.h>
   9 #include <linux/rbtree.h>
  10 #include <linux/types.h>
  11
  12 struct perf_sample;
  13 struct perf_session;
  14
  15 enum kwork_class_type {
  16         KWORK_CLASS_IRQ,
  17         KWORK_CLASS_SOFTIRQ,
  18         KWORK_CLASS_WORKQUEUE,
  19         KWORK_CLASS_SCHED,
  20         KWORK_CLASS_MAX,
  21 };
  22
  23 enum kwork_report_type {
  24         KWORK_REPORT_RUNTIME,
  25         KWORK_REPORT_LATENCY,
  26         KWORK_REPORT_TIMEHIST,
  27         KWORK_REPORT_TOP,
  28 };
  29
  30 enum kwork_trace_type {
  31         KWORK_TRACE_RAISE,
  32         KWORK_TRACE_ENTRY,
  33         KWORK_TRACE_EXIT,
  34         KWORK_TRACE_MAX,
  35 };
  36
  37 /*
  38  * data structure:
  39  *
  40  *                 +==================+ +============+ +======================+
  41  *                 |      class       | |    work    | |         atom         |
  42  *                 +==================+ +============+ +======================+
  43  * +------------+  |  +-----+         | |  +------+  | |  +-------+   +-----+ |
  44  * | perf_kwork | +-> | irq | --------|+-> | eth0 | --+-> | raise | - | ... | --+   +-----------+
  45  * +-----+------+ ||  +-----+         |||  +------+  |||  +-------+   +-----+ | |   |           |
  46  *       |        ||                  |||            |||                      | +-> | atom_page |
  47  *       |        ||                  |||            |||  +-------+   +-----+ |     |           |
  48  *       |  class_list                |||            |+-> | entry | - | ... | ----> |           |
  49  *       |        ||                  |||            |||  +-------+   +-----+ |     |           |
  50  *       |        ||                  |||            |||                      | +-> |           |
  51  *       |        ||                  |||            |||  +-------+   +-----+ | |   |           |
  52  *       |        ||                  |||            |+-> | exit  | - | ... | --+   +-----+-----+
  53  *       |        ||                  |||            | |  +-------+   +-----+ |           |
  54  *       |        ||                  |||            | |                      |           |
  55  *       |        ||                  |||  +-----+   | |                      |           |
  56  *       |        ||                  |+-> | ... |   | |                      |           |
  57  *       |        ||                  | |  +-----+   | |                      |           |
  58  *       |        ||                  | |            | |                      |           |
  59  *       |        ||  +---------+     | |  +-----+   | |  +-------+   +-----+ |           |
  60  *       |        +-> | softirq | -------> | RCU | ---+-> | raise | - | ... | --+   +-----+-----+
  61  *       |        ||  +---------+     | |  +-----+   |||  +-------+   +-----+ | |   |           |
  62  *       |        ||                  | |            |||                      | +-> | atom_page |
  63  *       |        ||                  | |            |||  +-------+   +-----+ |     |           |
  64  *       |        ||                  | |            |+-> | entry | - | ... | ----> |           |
  65  *       |        ||                  | |            |||  +-------+   +-----+ |     |           |
  66  *       |        ||                  | |            |||                      | +-> |           |
  67  *       |        ||                  | |            |||  +-------+   +-----+ | |   |           |
  68  *       |        ||                  | |            |+-> | exit  | - | ... | --+   +-----+-----+
  69  *       |        ||                  | |            | |  +-------+   +-----+ |           |
  70  *       |        ||                  | |            | |                      |           |
  71  *       |        ||  +-----------+   | |  +-----+   | |                      |           |
  72  *       |        +-> | workqueue | -----> | ... |   | |                      |           |
  73  *       |         |  +-----------+   | |  +-----+   | |                      |           |
  74  *       |         +==================+ +============+ +======================+           |
  75  *       |                                                                                |
  76  *       +---->  atom_page_list  ---------------------------------------------------------+
  77  *
  78  */
  79
  80 struct kwork_atom {
  81         struct list_head list;
  82         u64 time;
  83         struct kwork_atom *prev;
  84
  85         void *page_addr;
  86         unsigned long bit_inpage;
  87 };
  88
  89 #define NR_ATOM_PER_PAGE 128
  90 struct kwork_atom_page {
  91         struct list_head list;
  92         struct kwork_atom atoms[NR_ATOM_PER_PAGE];
  93         DECLARE_BITMAP(bitmap, NR_ATOM_PER_PAGE);
  94 };
  95
  96 struct perf_kwork;
  97 struct kwork_class;
  98 struct kwork_work {
  99         /*
 100          * class field
 101          */
 102         struct rb_node node;
 103         struct kwork_class *class;
 104
 105         /*
 106          * work field
 107          */
 108         u64 id;
 109         int cpu;
 110         char *name;
 111
 112         /*
 113          * atom field
 114          */
 115         u64 nr_atoms;
 116         struct list_head atom_list[KWORK_TRACE_MAX];
 117
 118         /*
 119          * runtime report
 120          */
 121         u64 max_runtime;
 122         u64 max_runtime_start;
 123         u64 max_runtime_end;
 124         u64 total_runtime;
 125
 126         /*
 127          * latency report
 128          */
 129         u64 max_latency;
 130         u64 max_latency_start;
 131         u64 max_latency_end;
 132         u64 total_latency;
 133
 134         /*
 135          * top report
 136          */
 137         u32 cpu_usage;
 138         u32 tgid;
 139         bool is_kthread;
 140 };
 141
 142 struct kwork_class {
 143         struct list_head list;
 144         const char *name;
 145         enum kwork_class_type type;
 146
 147         unsigned int nr_tracepoints;
 148         const struct evsel_str_handler *tp_handlers;
 149
 150         struct rb_root_cached work_root;
 151
 152         int (*class_init)(struct kwork_class *class,
 153                           struct perf_session *session);
 154
 155         void (*work_init)(struct perf_kwork *kwork,
 156                           struct kwork_class *class,
 157                           struct kwork_work *work,
 158                           enum kwork_trace_type src_type,
 159                           struct evsel *evsel,
 160                           struct perf_sample *sample,
 161                           struct machine *machine);
 162
 163         void (*work_name)(struct kwork_work *work,
 164                           char *buf, int len);
 165 };
 166
 167 struct trace_kwork_handler {
 168         int (*raise_event)(struct perf_kwork *kwork,
 169                            struct kwork_class *class, struct evsel *evsel,
 170                            struct perf_sample *sample, struct machine *machine);
 171
 172         int (*entry_event)(struct perf_kwork *kwork,
 173                            struct kwork_class *class, struct evsel *evsel,
 174                            struct perf_sample *sample, struct machine *machine);
 175
 176         int (*exit_event)(struct perf_kwork *kwork,
 177                           struct kwork_class *class, struct evsel *evsel,
 178                           struct perf_sample *sample, struct machine *machine);
 179
 180         int (*sched_switch_event)(struct perf_kwork *kwork,
 181                                   struct kwork_class *class, struct evsel *evsel,
 182                                   struct perf_sample *sample, struct machine *machine);
 183 };
 184
 185 struct __top_cpus_runtime {
 186         u64 load;
 187         u64 idle;
 188         u64 irq;
 189         u64 softirq;
 190         u64 total;
 191 };
 192
 193 struct kwork_top_stat {
 194         DECLARE_BITMAP(all_cpus_bitmap, MAX_NR_CPUS);
 195         struct __top_cpus_runtime *cpus_runtime;
 196 };
 197
 198 struct perf_kwork {
 199         /*
 200          * metadata
 201          */
 202         struct perf_tool tool;
 203         struct list_head class_list;
 204         struct list_head atom_page_list;
 205         struct list_head sort_list, cmp_id;
 206         struct rb_root_cached sorted_work_root;
 207         const struct trace_kwork_handler *tp_handler;
 208
 209         /*
 210          * profile filters
 211          */
 212         const char *profile_name;
 213
 214         const char *cpu_list;
 215         DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
 216
 217         const char *time_str;
 218         struct perf_time_interval ptime;
 219
 220         /*
 221          * options for command
 222          */
 223         bool force;
 224         const char *event_list_str;
 225         enum kwork_report_type report;
 226
 227         /*
 228          * options for subcommand
 229          */
 230         bool summary;
 231         const char *sort_order;
 232         bool show_callchain;
 233         unsigned int max_stack;
 234         bool use_bpf;
 235
 236         /*
 237          * statistics
 238          */
 239         u64 timestart;
 240         u64 timeend;
 241
 242         unsigned long nr_events;
 243         unsigned long nr_lost_chunks;
 244         unsigned long nr_lost_events;
 245
 246         u64 all_runtime;
 247         u64 all_count;
 248         u64 nr_skipped_events[KWORK_TRACE_MAX + 1];
 249
 250         /*
 251          * perf kwork top data
 252          */
 253         struct kwork_top_stat top_stat;
 254 };
 255
 256 struct kwork_work *perf_kwork_add_work(struct perf_kwork *kwork,
 257                                        struct kwork_class *class,
 258                                        struct kwork_work *key);
 259
 260 #ifdef HAVE_BPF_SKEL
 261
 262 int perf_kwork__trace_prepare_bpf(struct perf_kwork *kwork);
 263 int perf_kwork__report_read_bpf(struct perf_kwork *kwork);
 264 void perf_kwork__report_cleanup_bpf(void);
 265
 266 void perf_kwork__trace_start(void);
 267 void perf_kwork__trace_finish(void);
 268
 269 int perf_kwork__top_prepare_bpf(struct perf_kwork *kwork);
 270 int perf_kwork__top_read_bpf(struct perf_kwork *kwork);
 271 void perf_kwork__top_cleanup_bpf(void);
 272
 273 void perf_kwork__top_start(void);
 274 void perf_kwork__top_finish(void);
 275
 276 #else  /* !HAVE_BPF_SKEL */
 277
 278 static inline int
 279 perf_kwork__trace_prepare_bpf(struct perf_kwork *kwork __maybe_unused)
 280 {
 281         return -1;
 282 }
 283
 284 static inline int
 285 perf_kwork__report_read_bpf(struct perf_kwork *kwork __maybe_unused)
 286 {
 287         return -1;
 288 }
 289
 290 static inline void perf_kwork__report_cleanup_bpf(void) {}
 291
 292 static inline void perf_kwork__trace_start(void) {}
 293 static inline void perf_kwork__trace_finish(void) {}
 294
 295 static inline int
 296 perf_kwork__top_prepare_bpf(struct perf_kwork *kwork __maybe_unused)
 297 {
 298         return -1;
 299 }
 300
 301 static inline int
 302 perf_kwork__top_read_bpf(struct perf_kwork *kwork __maybe_unused)
 303 {
 304         return -1;
 305 }
 306
 307 static inline void perf_kwork__top_cleanup_bpf(void) {}
 308
 309 static inline void perf_kwork__top_start(void) {}
 310 static inline void perf_kwork__top_finish(void) {}
 311
 312 #endif  /* HAVE_BPF_SKEL */
 313
 314 #endif  /* PERF_UTIL_KWORK_H */