1 /* taskstats.h - exporting per-task statistics
3 * Copyright (C) Shailabh Nagar, IBM Corp. 2006
4 * (C) Balbir Singh, IBM Corp. 2006
5 * (C) Jay Lan, SGI, 2006
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.
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.
16 #ifndef _LINUX_TASKSTATS_H
17 #define _LINUX_TASKSTATS_H
19 /* Format for per-task data returned to userland when
21 * - listener requests stats for a task
23 * The struct is versioned. Newer versions should only add fields to
24 * the bottom of the struct to maintain backward compatibility.
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
34 #define TASKSTATS_VERSION 2
35 #define TS_COMM_LEN 16 /* should sync up with TASK_COMM_LEN
42 __u32 ac_exitcode; /* Exit status */
43 __u8 ac_flag; /* Record flags */
44 __u8 ac_nice; /* task_nice */
46 /* Delay accounting fields start
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
52 * xxx_count is the number of delay values recorded
53 * xxx_delay_total is the corresponding cumulative delay in nanoseconds
55 * xxx_delay_total wraps around to zero on overflow
56 * xxx_count incremented regardless of overflow
59 /* Delay waiting for cpu, while runnable
60 * count, delay_total NOT updated atomically
63 __u64 cpu_delay_total;
65 /* Following four fields atomically updated using task->delays->lock */
67 /* Delay waiting for synchronous block I/O to complete
68 * does not account for delays in I/O submission
71 __u64 blkio_delay_total;
73 /* Delay waiting for page fault I/O (swap in only) */
75 __u64 swapin_delay_total;
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
83 __u64 cpu_run_real_total;
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
91 __u64 cpu_run_virtual_total;
92 /* Delay accounting fields end */
93 /* version 1 ends here */
95 /* Basic Accounting Fields start */
96 char ac_comm[TS_COMM_LEN]; /* Command name */
97 __u8 ac_sched; /* Scheduling discipline */
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 */
111 /* Extended accounting fields start */
112 __u64 acct_rss_mem1; /* accumulated rss usage */
113 __u64 acct_vm_mem1; /* accumulated virtual memory usage */
114 __u64 hiwater_rss; /* High-watermark of RSS usage */
115 __u64 hiwater_vm; /* High-water virtual memory usage */
116 __u64 read_char; /* bytes read */
117 __u64 write_char; /* bytes written */
118 __u64 read_syscalls; /* read syscalls */
119 __u64 write_syscalls; /* write syscalls */
120 /* Extended accounting fields end */
125 * Commands sent from userspace
126 * Not versioned. New commands should only be inserted at the enum's end
127 * prior to __TASKSTATS_CMD_MAX
131 TASKSTATS_CMD_UNSPEC = 0, /* Reserved */
132 TASKSTATS_CMD_GET, /* user->kernel request/get-response */
133 TASKSTATS_CMD_NEW, /* kernel->user event */
137 #define TASKSTATS_CMD_MAX (__TASKSTATS_CMD_MAX - 1)
140 TASKSTATS_TYPE_UNSPEC = 0, /* Reserved */
141 TASKSTATS_TYPE_PID, /* Process id */
142 TASKSTATS_TYPE_TGID, /* Thread group id */
143 TASKSTATS_TYPE_STATS, /* taskstats structure */
144 TASKSTATS_TYPE_AGGR_PID, /* contains pid + stats */
145 TASKSTATS_TYPE_AGGR_TGID, /* contains tgid + stats */
146 __TASKSTATS_TYPE_MAX,
149 #define TASKSTATS_TYPE_MAX (__TASKSTATS_TYPE_MAX - 1)
152 TASKSTATS_CMD_ATTR_UNSPEC = 0,
153 TASKSTATS_CMD_ATTR_PID,
154 TASKSTATS_CMD_ATTR_TGID,
155 TASKSTATS_CMD_ATTR_REGISTER_CPUMASK,
156 TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK,
157 __TASKSTATS_CMD_ATTR_MAX,
160 #define TASKSTATS_CMD_ATTR_MAX (__TASKSTATS_CMD_ATTR_MAX - 1)
162 /* NETLINK_GENERIC related info */
164 #define TASKSTATS_GENL_NAME "TASKSTATS"
165 #define TASKSTATS_GENL_VERSION 0x1
167 #endif /* _LINUX_TASKSTATS_H */