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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 | } | |
02bafd37 NK |
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 | } |