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