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1 | /* taskstats.h - exporting per-task statistics | |
2 | * | |
3 | * Copyright (C) Shailabh Nagar, IBM Corp. 2006 | |
4 | * (C) Balbir Singh, IBM Corp. 2006 | |
5 | * (C) Jay Lan, SGI, 2006 | |
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 | #include <linux/types.h> | |
20 | ||
21 | /* Format for per-task data returned to userland when | |
22 | * - a task exits | |
23 | * - listener requests stats for a task | |
24 | * | |
25 | * The struct is versioned. Newer versions should only add fields to | |
26 | * the bottom of the struct to maintain backward compatibility. | |
27 | * | |
28 | * | |
29 | * To add new fields | |
30 | * a) bump up TASKSTATS_VERSION | |
31 | * b) add comment indicating new version number at end of struct | |
32 | * c) add new fields after version comment; maintain 64-bit alignment | |
33 | */ | |
34 | ||
35 | ||
36 | #define TASKSTATS_VERSION 7 | |
37 | #define TS_COMM_LEN 32 /* should be >= TASK_COMM_LEN | |
38 | * in linux/sched.h */ | |
39 | ||
40 | struct taskstats { | |
41 | ||
42 | /* The version number of this struct. This field is always set to | |
43 | * TAKSTATS_VERSION, which is defined in <linux/taskstats.h>. | |
44 | * Each time the struct is changed, the value should be incremented. | |
45 | */ | |
46 | __u16 version; | |
47 | __u32 ac_exitcode; /* Exit status */ | |
48 | ||
49 | /* The accounting flags of a task as defined in <linux/acct.h> | |
50 | * Defined values are AFORK, ASU, ACOMPAT, ACORE, and AXSIG. | |
51 | */ | |
52 | __u8 ac_flag; /* Record flags */ | |
53 | __u8 ac_nice; /* task_nice */ | |
54 | ||
55 | /* Delay accounting fields start | |
56 | * | |
57 | * All values, until comment "Delay accounting fields end" are | |
58 | * available only if delay accounting is enabled, even though the last | |
59 | * few fields are not delays | |
60 | * | |
61 | * xxx_count is the number of delay values recorded | |
62 | * xxx_delay_total is the corresponding cumulative delay in nanoseconds | |
63 | * | |
64 | * xxx_delay_total wraps around to zero on overflow | |
65 | * xxx_count incremented regardless of overflow | |
66 | */ | |
67 | ||
68 | /* Delay waiting for cpu, while runnable | |
69 | * count, delay_total NOT updated atomically | |
70 | */ | |
71 | __u64 cpu_count __attribute__((aligned(8))); | |
72 | __u64 cpu_delay_total; | |
73 | ||
74 | /* Following four fields atomically updated using task->delays->lock */ | |
75 | ||
76 | /* Delay waiting for synchronous block I/O to complete | |
77 | * does not account for delays in I/O submission | |
78 | */ | |
79 | __u64 blkio_count; | |
80 | __u64 blkio_delay_total; | |
81 | ||
82 | /* Delay waiting for page fault I/O (swap in only) */ | |
83 | __u64 swapin_count; | |
84 | __u64 swapin_delay_total; | |
85 | ||
86 | /* cpu "wall-clock" running time | |
87 | * On some architectures, value will adjust for cpu time stolen | |
88 | * from the kernel in involuntary waits due to virtualization. | |
89 | * Value is cumulative, in nanoseconds, without a corresponding count | |
90 | * and wraps around to zero silently on overflow | |
91 | */ | |
92 | __u64 cpu_run_real_total; | |
93 | ||
94 | /* cpu "virtual" running time | |
95 | * Uses time intervals seen by the kernel i.e. no adjustment | |
96 | * for kernel's involuntary waits due to virtualization. | |
97 | * Value is cumulative, in nanoseconds, without a corresponding count | |
98 | * and wraps around to zero silently on overflow | |
99 | */ | |
100 | __u64 cpu_run_virtual_total; | |
101 | /* Delay accounting fields end */ | |
102 | /* version 1 ends here */ | |
103 | ||
104 | /* Basic Accounting Fields start */ | |
105 | char ac_comm[TS_COMM_LEN]; /* Command name */ | |
106 | __u8 ac_sched __attribute__((aligned(8))); | |
107 | /* Scheduling discipline */ | |
108 | __u8 ac_pad[3]; | |
109 | __u32 ac_uid __attribute__((aligned(8))); | |
110 | /* User ID */ | |
111 | __u32 ac_gid; /* Group ID */ | |
112 | __u32 ac_pid; /* Process ID */ | |
113 | __u32 ac_ppid; /* Parent process ID */ | |
114 | __u32 ac_btime; /* Begin time [sec since 1970] */ | |
115 | __u64 ac_etime __attribute__((aligned(8))); | |
116 | /* Elapsed time [usec] */ | |
117 | __u64 ac_utime; /* User CPU time [usec] */ | |
118 | __u64 ac_stime; /* SYstem CPU time [usec] */ | |
119 | __u64 ac_minflt; /* Minor Page Fault Count */ | |
120 | __u64 ac_majflt; /* Major Page Fault Count */ | |
121 | /* Basic Accounting Fields end */ | |
122 | ||
123 | /* Extended accounting fields start */ | |
124 | /* Accumulated RSS usage in duration of a task, in MBytes-usecs. | |
125 | * The current rss usage is added to this counter every time | |
126 | * a tick is charged to a task's system time. So, at the end we | |
127 | * will have memory usage multiplied by system time. Thus an | |
128 | * average usage per system time unit can be calculated. | |
129 | */ | |
130 | __u64 coremem; /* accumulated RSS usage in MB-usec */ | |
131 | /* Accumulated virtual memory usage in duration of a task. | |
132 | * Same as acct_rss_mem1 above except that we keep track of VM usage. | |
133 | */ | |
134 | __u64 virtmem; /* accumulated VM usage in MB-usec */ | |
135 | ||
136 | /* High watermark of RSS and virtual memory usage in duration of | |
137 | * a task, in KBytes. | |
138 | */ | |
139 | __u64 hiwater_rss; /* High-watermark of RSS usage, in KB */ | |
140 | __u64 hiwater_vm; /* High-water VM usage, in KB */ | |
141 | ||
142 | /* The following four fields are I/O statistics of a task. */ | |
143 | __u64 read_char; /* bytes read */ | |
144 | __u64 write_char; /* bytes written */ | |
145 | __u64 read_syscalls; /* read syscalls */ | |
146 | __u64 write_syscalls; /* write syscalls */ | |
147 | /* Extended accounting fields end */ | |
148 | ||
149 | #define TASKSTATS_HAS_IO_ACCOUNTING | |
150 | /* Per-task storage I/O accounting starts */ | |
151 | __u64 read_bytes; /* bytes of read I/O */ | |
152 | __u64 write_bytes; /* bytes of write I/O */ | |
153 | __u64 cancelled_write_bytes; /* bytes of cancelled write I/O */ | |
154 | ||
155 | __u64 nvcsw; /* voluntary_ctxt_switches */ | |
156 | __u64 nivcsw; /* nonvoluntary_ctxt_switches */ | |
157 | ||
158 | /* time accounting for SMT machines */ | |
159 | __u64 ac_utimescaled; /* utime scaled on frequency etc */ | |
160 | __u64 ac_stimescaled; /* stime scaled on frequency etc */ | |
161 | __u64 cpu_scaled_run_real_total; /* scaled cpu_run_real_total */ | |
162 | ||
163 | /* Delay waiting for memory reclaim */ | |
164 | __u64 freepages_count; | |
165 | __u64 freepages_delay_total; | |
166 | }; | |
167 | ||
168 | ||
169 | /* | |
170 | * Commands sent from userspace | |
171 | * Not versioned. New commands should only be inserted at the enum's end | |
172 | * prior to __TASKSTATS_CMD_MAX | |
173 | */ | |
174 | ||
175 | enum { | |
176 | TASKSTATS_CMD_UNSPEC = 0, /* Reserved */ | |
177 | TASKSTATS_CMD_GET, /* user->kernel request/get-response */ | |
178 | TASKSTATS_CMD_NEW, /* kernel->user event */ | |
179 | __TASKSTATS_CMD_MAX, | |
180 | }; | |
181 | ||
182 | #define TASKSTATS_CMD_MAX (__TASKSTATS_CMD_MAX - 1) | |
183 | ||
184 | enum { | |
185 | TASKSTATS_TYPE_UNSPEC = 0, /* Reserved */ | |
186 | TASKSTATS_TYPE_PID, /* Process id */ | |
187 | TASKSTATS_TYPE_TGID, /* Thread group id */ | |
188 | TASKSTATS_TYPE_STATS, /* taskstats structure */ | |
189 | TASKSTATS_TYPE_AGGR_PID, /* contains pid + stats */ | |
190 | TASKSTATS_TYPE_AGGR_TGID, /* contains tgid + stats */ | |
191 | __TASKSTATS_TYPE_MAX, | |
192 | }; | |
193 | ||
194 | #define TASKSTATS_TYPE_MAX (__TASKSTATS_TYPE_MAX - 1) | |
195 | ||
196 | enum { | |
197 | TASKSTATS_CMD_ATTR_UNSPEC = 0, | |
198 | TASKSTATS_CMD_ATTR_PID, | |
199 | TASKSTATS_CMD_ATTR_TGID, | |
200 | TASKSTATS_CMD_ATTR_REGISTER_CPUMASK, | |
201 | TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK, | |
202 | __TASKSTATS_CMD_ATTR_MAX, | |
203 | }; | |
204 | ||
205 | #define TASKSTATS_CMD_ATTR_MAX (__TASKSTATS_CMD_ATTR_MAX - 1) | |
206 | ||
207 | /* NETLINK_GENERIC related info */ | |
208 | ||
209 | #define TASKSTATS_GENL_NAME "TASKSTATS" | |
210 | #define TASKSTATS_GENL_VERSION 0x1 | |
211 | ||
212 | #endif /* _LINUX_TASKSTATS_H */ |