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