diff options
Diffstat (limited to 'tools/lib/traceevent/plugin_sched_switch.c')
-rw-r--r-- | tools/lib/traceevent/plugin_sched_switch.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/tools/lib/traceevent/plugin_sched_switch.c b/tools/lib/traceevent/plugin_sched_switch.c new file mode 100644 index 000000000000..f1ce60065258 --- /dev/null +++ b/tools/lib/traceevent/plugin_sched_switch.c | |||
@@ -0,0 +1,160 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> | ||
3 | * | ||
4 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
5 | * This program is free software; you can redistribute it and/or | ||
6 | * modify it under the terms of the GNU Lesser General Public | ||
7 | * License as published by the Free Software Foundation; | ||
8 | * version 2.1 of the License (not later!) | ||
9 | * | ||
10 | * This program is distributed in the hope that it will be useful, | ||
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
13 | * GNU Lesser General Public License for more details. | ||
14 | * | ||
15 | * You should have received a copy of the GNU Lesser General Public | ||
16 | * License along with this program; if not, see <http://www.gnu.org/licenses> | ||
17 | * | ||
18 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
19 | */ | ||
20 | #include <stdio.h> | ||
21 | #include <stdlib.h> | ||
22 | #include <string.h> | ||
23 | |||
24 | #include "event-parse.h" | ||
25 | |||
26 | static void write_state(struct trace_seq *s, int val) | ||
27 | { | ||
28 | const char states[] = "SDTtZXxW"; | ||
29 | int found = 0; | ||
30 | int i; | ||
31 | |||
32 | for (i = 0; i < (sizeof(states) - 1); i++) { | ||
33 | if (!(val & (1 << i))) | ||
34 | continue; | ||
35 | |||
36 | if (found) | ||
37 | trace_seq_putc(s, '|'); | ||
38 | |||
39 | found = 1; | ||
40 | trace_seq_putc(s, states[i]); | ||
41 | } | ||
42 | |||
43 | if (!found) | ||
44 | trace_seq_putc(s, 'R'); | ||
45 | } | ||
46 | |||
47 | static void write_and_save_comm(struct format_field *field, | ||
48 | struct pevent_record *record, | ||
49 | struct trace_seq *s, int pid) | ||
50 | { | ||
51 | const char *comm; | ||
52 | int len; | ||
53 | |||
54 | comm = (char *)(record->data + field->offset); | ||
55 | len = s->len; | ||
56 | trace_seq_printf(s, "%.*s", | ||
57 | field->size, comm); | ||
58 | |||
59 | /* make sure the comm has a \0 at the end. */ | ||
60 | trace_seq_terminate(s); | ||
61 | comm = &s->buffer[len]; | ||
62 | |||
63 | /* Help out the comm to ids. This will handle dups */ | ||
64 | pevent_register_comm(field->event->pevent, comm, pid); | ||
65 | } | ||
66 | |||
67 | static int sched_wakeup_handler(struct trace_seq *s, | ||
68 | struct pevent_record *record, | ||
69 | struct event_format *event, void *context) | ||
70 | { | ||
71 | struct format_field *field; | ||
72 | unsigned long long val; | ||
73 | |||
74 | if (pevent_get_field_val(s, event, "pid", record, &val, 1)) | ||
75 | return trace_seq_putc(s, '!'); | ||
76 | |||
77 | field = pevent_find_any_field(event, "comm"); | ||
78 | if (field) { | ||
79 | write_and_save_comm(field, record, s, val); | ||
80 | trace_seq_putc(s, ':'); | ||
81 | } | ||
82 | trace_seq_printf(s, "%lld", val); | ||
83 | |||
84 | if (pevent_get_field_val(s, event, "prio", record, &val, 0) == 0) | ||
85 | trace_seq_printf(s, " [%lld]", val); | ||
86 | |||
87 | if (pevent_get_field_val(s, event, "success", record, &val, 1) == 0) | ||
88 | trace_seq_printf(s, " success=%lld", val); | ||
89 | |||
90 | if (pevent_get_field_val(s, event, "target_cpu", record, &val, 0) == 0) | ||
91 | trace_seq_printf(s, " CPU:%03llu", val); | ||
92 | |||
93 | return 0; | ||
94 | } | ||
95 | |||
96 | static int sched_switch_handler(struct trace_seq *s, | ||
97 | struct pevent_record *record, | ||
98 | struct event_format *event, void *context) | ||
99 | { | ||
100 | struct format_field *field; | ||
101 | unsigned long long val; | ||
102 | |||
103 | if (pevent_get_field_val(s, event, "prev_pid", record, &val, 1)) | ||
104 | return trace_seq_putc(s, '!'); | ||
105 | |||
106 | field = pevent_find_any_field(event, "prev_comm"); | ||
107 | if (field) { | ||
108 | write_and_save_comm(field, record, s, val); | ||
109 | trace_seq_putc(s, ':'); | ||
110 | } | ||
111 | trace_seq_printf(s, "%lld ", val); | ||
112 | |||
113 | if (pevent_get_field_val(s, event, "prev_prio", record, &val, 0) == 0) | ||
114 | trace_seq_printf(s, "[%lld] ", val); | ||
115 | |||
116 | if (pevent_get_field_val(s, event, "prev_state", record, &val, 0) == 0) | ||
117 | write_state(s, val); | ||
118 | |||
119 | trace_seq_puts(s, " ==> "); | ||
120 | |||
121 | if (pevent_get_field_val(s, event, "next_pid", record, &val, 1)) | ||
122 | return trace_seq_putc(s, '!'); | ||
123 | |||
124 | field = pevent_find_any_field(event, "next_comm"); | ||
125 | if (field) { | ||
126 | write_and_save_comm(field, record, s, val); | ||
127 | trace_seq_putc(s, ':'); | ||
128 | } | ||
129 | trace_seq_printf(s, "%lld", val); | ||
130 | |||
131 | if (pevent_get_field_val(s, event, "next_prio", record, &val, 0) == 0) | ||
132 | trace_seq_printf(s, " [%lld]", val); | ||
133 | |||
134 | return 0; | ||
135 | } | ||
136 | |||
137 | int PEVENT_PLUGIN_LOADER(struct pevent *pevent) | ||
138 | { | ||
139 | pevent_register_event_handler(pevent, -1, "sched", "sched_switch", | ||
140 | sched_switch_handler, NULL); | ||
141 | |||
142 | pevent_register_event_handler(pevent, -1, "sched", "sched_wakeup", | ||
143 | sched_wakeup_handler, NULL); | ||
144 | |||
145 | pevent_register_event_handler(pevent, -1, "sched", "sched_wakeup_new", | ||
146 | sched_wakeup_handler, NULL); | ||
147 | return 0; | ||
148 | } | ||
149 | |||
150 | void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent) | ||
151 | { | ||
152 | pevent_unregister_event_handler(pevent, -1, "sched", "sched_switch", | ||
153 | sched_switch_handler, NULL); | ||
154 | |||
155 | pevent_unregister_event_handler(pevent, -1, "sched", "sched_wakeup", | ||
156 | sched_wakeup_handler, NULL); | ||
157 | |||
158 | pevent_unregister_event_handler(pevent, -1, "sched", "sched_wakeup_new", | ||
159 | sched_wakeup_handler, NULL); | ||
160 | } | ||