2ade0db7cbeff18c58348ec77645e620891de94c
[lttngtop.git] / src / cputop.c
1 /*
2 * Copyright (C) 2011 Julien Desfossez
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License Version 2 as
6 * published by the Free Software Foundation;
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
16 * MA 02111-1307, USA.
17 */
18
19 #include <babeltrace/babeltrace.h>
20
21 #include "lttngtoptypes.h"
22 #include "common.h"
23 #include "cputop.h"
24
25 void update_cputop_data(unsigned long timestamp, int64_t cpu, int prev_pid,
26 int next_pid, char *prev_comm, char *next_comm)
27 {
28 struct cputime *tmpcpu;
29 unsigned long elapsed;
30
31 tmpcpu = get_cpu(cpu);
32
33 if (tmpcpu->current_task && tmpcpu->current_task->pid == prev_pid) {
34 elapsed = timestamp - tmpcpu->task_start;
35 tmpcpu->current_task->totalcpunsec += elapsed;
36 tmpcpu->current_task->threadstotalcpunsec += elapsed;
37 if (tmpcpu->current_task->pid != tmpcpu->current_task->tid)
38 tmpcpu->current_task->threadparent->threadstotalcpunsec += elapsed;
39 }
40
41 if (next_pid != 0)
42 tmpcpu->current_task = get_proc(&lttngtop, next_pid, next_comm, timestamp);
43 else
44 tmpcpu->current_task = NULL;
45
46 tmpcpu->task_start = timestamp;
47 }
48
49 enum bt_cb_ret handle_sched_switch(struct bt_ctf_event *call_data,
50 void *private_data)
51 {
52 struct definition *scope;
53 unsigned long timestamp;
54 uint64_t cpu_id;
55 char *prev_comm, *next_comm;
56 int prev_tid, next_tid;
57
58 timestamp = bt_ctf_get_timestamp(call_data);
59 if (timestamp == -1ULL)
60 goto error;
61
62 scope = bt_ctf_get_top_level_scope(call_data,
63 BT_EVENT_FIELDS);
64 prev_comm = bt_ctf_get_char_array(bt_ctf_get_field(call_data,
65 scope, "_prev_comm"));
66 if (bt_ctf_field_get_error()) {
67 fprintf(stderr, "Missing prev_comm context info\n");
68 goto error;
69 }
70
71 next_comm = bt_ctf_get_char_array(bt_ctf_get_field(call_data,
72 scope, "_next_comm"));
73 if (bt_ctf_field_get_error()) {
74 fprintf(stderr, "Missing next_comm context info\n");
75 goto error;
76 }
77
78 prev_tid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
79 scope, "_prev_tid"));
80 if (bt_ctf_field_get_error()) {
81 fprintf(stderr, "Missing prev_tid context info\n");
82 goto error;
83 }
84
85 next_tid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
86 scope, "_next_tid"));
87 if (bt_ctf_field_get_error()) {
88 fprintf(stderr, "Missing next_tid context info\n");
89 goto error;
90 }
91
92 scope = bt_ctf_get_top_level_scope(call_data,
93 BT_STREAM_PACKET_CONTEXT);
94 cpu_id = bt_ctf_get_uint64(bt_ctf_get_field(call_data,
95 scope, "cpu_id"));
96 if (bt_ctf_field_get_error()) {
97 fprintf(stderr, "Missing cpu_id context info\n");
98 goto error;
99 }
100
101 update_cputop_data(timestamp, cpu_id, prev_tid, next_tid,
102 prev_comm, next_comm);
103
104 return BT_CB_OK;
105
106 error:
107 return BT_CB_ERROR_STOP;
108 }
109
110 enum bt_cb_ret handle_sched_process_free(struct bt_ctf_event *call_data,
111 void *private_data)
112 {
113 struct definition *scope;
114 unsigned long timestamp;
115 char *comm;
116 int tid;
117
118 timestamp = bt_ctf_get_timestamp(call_data);
119 if (timestamp == -1ULL)
120 goto error;
121
122 scope = bt_ctf_get_top_level_scope(call_data,
123 BT_EVENT_FIELDS);
124 comm = bt_ctf_get_char_array(bt_ctf_get_field(call_data,
125 scope, "_comm"));
126 if (bt_ctf_field_get_error()) {
127 fprintf(stderr, "Missing procname context info\n");
128 goto error;
129 }
130
131 tid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
132 scope, "_tid"));
133 if (bt_ctf_field_get_error()) {
134 fprintf(stderr, "Missing tid context info\n");
135 goto error;
136 }
137
138 death_proc(&lttngtop, tid, comm, timestamp);
139
140 return BT_CB_OK;
141
142 error:
143 return BT_CB_ERROR_STOP;
144
145 }
146
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