taskstats.h 6.3 KB

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