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c757249a SN |
1 | /* taskstats.h - exporting per-task statistics |
2 | * | |
3 | * Copyright (C) Shailabh Nagar, IBM Corp. 2006 | |
4 | * (C) Balbir Singh, IBM Corp. 2006 | |
f3cef7a9 | 5 | * (C) Jay Lan, SGI, 2006 |
c757249a SN |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of version 2.1 of the GNU Lesser General Public License | |
9 | * as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it would be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
14 | */ | |
15 | ||
16 | #ifndef _LINUX_TASKSTATS_H | |
17 | #define _LINUX_TASKSTATS_H | |
18 | ||
19 | /* Format for per-task data returned to userland when | |
20 | * - a task exits | |
21 | * - listener requests stats for a task | |
22 | * | |
23 | * The struct is versioned. Newer versions should only add fields to | |
24 | * the bottom of the struct to maintain backward compatibility. | |
25 | * | |
26 | * | |
27 | * To add new fields | |
28 | * a) bump up TASKSTATS_VERSION | |
29 | * b) add comment indicating new version number at end of struct | |
30 | * c) add new fields after version comment; maintain 64-bit alignment | |
31 | */ | |
32 | ||
f3cef7a9 JL |
33 | |
34 | #define TASKSTATS_VERSION 2 | |
35 | #define TS_COMM_LEN 16 /* should sync up with TASK_COMM_LEN | |
36 | * in linux/sched.h */ | |
c757249a SN |
37 | |
38 | struct taskstats { | |
39 | ||
40 | /* Version 1 */ | |
6f44993f | 41 | __u16 version; |
f3cef7a9 JL |
42 | __u32 ac_exitcode; /* Exit status */ |
43 | __u8 ac_flag; /* Record flags */ | |
44 | __u8 ac_nice; /* task_nice */ | |
6f44993f SN |
45 | |
46 | /* Delay accounting fields start | |
47 | * | |
48 | * All values, until comment "Delay accounting fields end" are | |
49 | * available only if delay accounting is enabled, even though the last | |
50 | * few fields are not delays | |
51 | * | |
52 | * xxx_count is the number of delay values recorded | |
53 | * xxx_delay_total is the corresponding cumulative delay in nanoseconds | |
54 | * | |
55 | * xxx_delay_total wraps around to zero on overflow | |
56 | * xxx_count incremented regardless of overflow | |
57 | */ | |
58 | ||
59 | /* Delay waiting for cpu, while runnable | |
60 | * count, delay_total NOT updated atomically | |
61 | */ | |
62 | __u64 cpu_count; | |
63 | __u64 cpu_delay_total; | |
64 | ||
65 | /* Following four fields atomically updated using task->delays->lock */ | |
66 | ||
67 | /* Delay waiting for synchronous block I/O to complete | |
68 | * does not account for delays in I/O submission | |
69 | */ | |
70 | __u64 blkio_count; | |
71 | __u64 blkio_delay_total; | |
72 | ||
73 | /* Delay waiting for page fault I/O (swap in only) */ | |
74 | __u64 swapin_count; | |
75 | __u64 swapin_delay_total; | |
76 | ||
77 | /* cpu "wall-clock" running time | |
78 | * On some architectures, value will adjust for cpu time stolen | |
79 | * from the kernel in involuntary waits due to virtualization. | |
80 | * Value is cumulative, in nanoseconds, without a corresponding count | |
81 | * and wraps around to zero silently on overflow | |
82 | */ | |
83 | __u64 cpu_run_real_total; | |
84 | ||
85 | /* cpu "virtual" running time | |
86 | * Uses time intervals seen by the kernel i.e. no adjustment | |
87 | * for kernel's involuntary waits due to virtualization. | |
88 | * Value is cumulative, in nanoseconds, without a corresponding count | |
89 | * and wraps around to zero silently on overflow | |
90 | */ | |
91 | __u64 cpu_run_virtual_total; | |
92 | /* Delay accounting fields end */ | |
93 | /* version 1 ends here */ | |
f3cef7a9 JL |
94 | |
95 | /* Basic Accounting Fields start */ | |
96 | char ac_comm[TS_COMM_LEN]; /* Command name */ | |
97 | __u8 ac_sched; /* Scheduling discipline */ | |
98 | __u8 ac_pad[3]; | |
99 | __u32 ac_uid; /* User ID */ | |
100 | __u32 ac_gid; /* Group ID */ | |
101 | __u32 ac_pid; /* Process ID */ | |
102 | __u32 ac_ppid; /* Parent process ID */ | |
103 | __u32 ac_btime; /* Begin time [sec since 1970] */ | |
104 | __u64 ac_etime; /* Elapsed time [usec] */ | |
105 | __u64 ac_utime; /* User CPU time [usec] */ | |
106 | __u64 ac_stime; /* SYstem CPU time [usec] */ | |
107 | __u64 ac_minflt; /* Minor Page Fault */ | |
108 | __u64 ac_majflt; /* Major Page Fault */ | |
109 | /* Basic Accounting Fields end */ | |
c757249a SN |
110 | }; |
111 | ||
112 | ||
c757249a SN |
113 | /* |
114 | * Commands sent from userspace | |
115 | * Not versioned. New commands should only be inserted at the enum's end | |
116 | * prior to __TASKSTATS_CMD_MAX | |
117 | */ | |
118 | ||
119 | enum { | |
120 | TASKSTATS_CMD_UNSPEC = 0, /* Reserved */ | |
121 | TASKSTATS_CMD_GET, /* user->kernel request/get-response */ | |
122 | TASKSTATS_CMD_NEW, /* kernel->user event */ | |
123 | __TASKSTATS_CMD_MAX, | |
124 | }; | |
125 | ||
126 | #define TASKSTATS_CMD_MAX (__TASKSTATS_CMD_MAX - 1) | |
127 | ||
128 | enum { | |
129 | TASKSTATS_TYPE_UNSPEC = 0, /* Reserved */ | |
130 | TASKSTATS_TYPE_PID, /* Process id */ | |
131 | TASKSTATS_TYPE_TGID, /* Thread group id */ | |
132 | TASKSTATS_TYPE_STATS, /* taskstats structure */ | |
133 | TASKSTATS_TYPE_AGGR_PID, /* contains pid + stats */ | |
134 | TASKSTATS_TYPE_AGGR_TGID, /* contains tgid + stats */ | |
135 | __TASKSTATS_TYPE_MAX, | |
136 | }; | |
137 | ||
138 | #define TASKSTATS_TYPE_MAX (__TASKSTATS_TYPE_MAX - 1) | |
139 | ||
140 | enum { | |
141 | TASKSTATS_CMD_ATTR_UNSPEC = 0, | |
142 | TASKSTATS_CMD_ATTR_PID, | |
143 | TASKSTATS_CMD_ATTR_TGID, | |
f9fd8914 SN |
144 | TASKSTATS_CMD_ATTR_REGISTER_CPUMASK, |
145 | TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK, | |
c757249a SN |
146 | __TASKSTATS_CMD_ATTR_MAX, |
147 | }; | |
148 | ||
149 | #define TASKSTATS_CMD_ATTR_MAX (__TASKSTATS_CMD_ATTR_MAX - 1) | |
150 | ||
151 | /* NETLINK_GENERIC related info */ | |
152 | ||
153 | #define TASKSTATS_GENL_NAME "TASKSTATS" | |
154 | #define TASKSTATS_GENL_VERSION 0x1 | |
155 | ||
156 | #endif /* _LINUX_TASKSTATS_H */ |