include/linux/taskstats.h - kernel/windcharger - Git at Google

 /* taskstats.h - exporting per-task statistics
  *
  * Copyright (C) Shailabh Nagar, IBM Corp. 2006
  *           (C) Balbir Singh,   IBM Corp. 2006
  *           (C) Jay Lan,        SGI, 2006
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of version 2.1 of the GNU Lesser General Public License
  * as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it would be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  */

 #ifndef _LINUX_TASKSTATS_H
 #define _LINUX_TASKSTATS_H

 #include <linux/types.h>

 /* Format for per-task data returned to userland when
  *	- a task exits
  *	- listener requests stats for a task
  *
  * The struct is versioned. Newer versions should only add fields to
  * the bottom of the struct to maintain backward compatibility.
  *
  *
  * To add new fields
  *	a) bump up TASKSTATS_VERSION
  *	b) add comment indicating new version number at end of struct
  *	c) add new fields after version comment; maintain 64-bit alignment
  */


 #define TASKSTATS_VERSION	8
 #define TS_COMM_LEN		32	/* should be >= TASK_COMM_LEN
 					 * in linux/sched.h */

 struct taskstats {

 	/* The version number of this struct. This field is always set to
 	 * TAKSTATS_VERSION, which is defined in <linux/taskstats.h>.
 	 * Each time the struct is changed, the value should be incremented.
 	 */
 	__u16	version;
 	__u32	ac_exitcode;		/* Exit status */

 	/* The accounting flags of a task as defined in <linux/acct.h>
 	 * Defined values are AFORK, ASU, ACOMPAT, ACORE, and AXSIG.
 	 */
 	__u8	ac_flag;		/* Record flags */
 	__u8	ac_nice;		/* task_nice */

 	/* Delay accounting fields start
 	 *
 	 * All values, until comment "Delay accounting fields end" are
 	 * available only if delay accounting is enabled, even though the last
 	 * few fields are not delays
 	 *
 	 * xxx_count is the number of delay values recorded
 	 * xxx_delay_total is the corresponding cumulative delay in nanoseconds
 	 *
 	 * xxx_delay_total wraps around to zero on overflow
 	 * xxx_count incremented regardless of overflow
 	 */

 	/* Delay waiting for cpu, while runnable
 	 * count, delay_total NOT updated atomically
 	 */
 	__u64	cpu_count __attribute__((aligned(8)));
 	__u64	cpu_delay_total;

 	/* Following four fields atomically updated using task->delays->lock */

 	/* Delay waiting for synchronous block I/O to complete
 	 * does not account for delays in I/O submission
 	 */
 	__u64	blkio_count;
 	__u64	blkio_delay_total;

 	/* Delay waiting for page fault I/O (swap in only) */
 	__u64	swapin_count;
 	__u64	swapin_delay_total;

 	/* cpu "wall-clock" running time
 	 * On some architectures, value will adjust for cpu time stolen
 	 * from the kernel in involuntary waits due to virtualization.
 	 * Value is cumulative, in nanoseconds, without a corresponding count
 	 * and wraps around to zero silently on overflow
 	 */
 	__u64	cpu_run_real_total;

 	/* cpu "virtual" running time
 	 * Uses time intervals seen by the kernel i.e. no adjustment
 	 * for kernel's involuntary waits due to virtualization.
 	 * Value is cumulative, in nanoseconds, without a corresponding count
 	 * and wraps around to zero silently on overflow
 	 */
 	__u64	cpu_run_virtual_total;
 	/* Delay accounting fields end */
 	/* version 1 ends here */

 	/* Basic Accounting Fields start */
 	char	ac_comm[TS_COMM_LEN];	/* Command name */
 	__u8	ac_sched __attribute__((aligned(8)));
 					/* Scheduling discipline */
 	__u8	ac_pad[3];
 	__u32	ac_uid __attribute__((aligned(8)));
 					/* User ID */
 	__u32	ac_gid;			/* Group ID */
 	__u32	ac_pid;			/* Process ID */
 	__u32	ac_ppid;		/* Parent process ID */
 	__u32	ac_btime;		/* Begin time [sec since 1970] */
 	__u64	ac_etime __attribute__((aligned(8)));
 					/* Elapsed time [usec] */
 	__u64	ac_utime;		/* User CPU time [usec] */
 	__u64	ac_stime;		/* SYstem CPU time [usec] */
 	__u64	ac_minflt;		/* Minor Page Fault Count */
 	__u64	ac_majflt;		/* Major Page Fault Count */
 	/* Basic Accounting Fields end */

 	/* Extended accounting fields start */
 	/* Accumulated RSS usage in duration of a task, in MBytes-usecs.
 	 * The current rss usage is added to this counter every time
 	 * a tick is charged to a task's system time. So, at the end we
 	 * will have memory usage multiplied by system time. Thus an
 	 * average usage per system time unit can be calculated.
 	 */
 	__u64	coremem;		/* accumulated RSS usage in MB-usec */
 	/* Accumulated virtual memory usage in duration of a task.
 	 * Same as acct_rss_mem1 above except that we keep track of VM usage.
 	 */
 	__u64	virtmem;		/* accumulated VM  usage in MB-usec */

 	/* High watermark of RSS and virtual memory usage in duration of
 	 * a task, in KBytes.
 	 */
 	__u64	hiwater_rss;		/* High-watermark of RSS usage, in KB */
 	__u64	hiwater_vm;		/* High-water VM usage, in KB */

 	/* The following four fields are I/O statistics of a task. */
 	__u64	read_char;		/* bytes read */
 	__u64	write_char;		/* bytes written */
 	__u64	read_syscalls;		/* read syscalls */
 	__u64	write_syscalls;		/* write syscalls */
 	/* Extended accounting fields end */

 #define TASKSTATS_HAS_IO_ACCOUNTING
 	/* Per-task storage I/O accounting starts */
 	__u64	read_bytes;		/* bytes of read I/O */
 	__u64	write_bytes;		/* bytes of write I/O */
 	__u64	cancelled_write_bytes;	/* bytes of cancelled write I/O */

 	__u64  nvcsw;			/* voluntary_ctxt_switches */
 	__u64  nivcsw;			/* nonvoluntary_ctxt_switches */

 	/* time accounting for SMT machines */
 	__u64	ac_utimescaled;		/* utime scaled on frequency etc */
 	__u64	ac_stimescaled;		/* stime scaled on frequency etc */
 	__u64	cpu_scaled_run_real_total; /* scaled cpu_run_real_total */

 	/* Delay waiting for memory reclaim */
 	__u64	freepages_count;
 	__u64	freepages_delay_total;
 };


 /*
  * Commands sent from userspace
  * Not versioned. New commands should only be inserted at the enum's end
  * prior to __TASKSTATS_CMD_MAX
  */

 enum {
 	TASKSTATS_CMD_UNSPEC = 0,	/* Reserved */
 	TASKSTATS_CMD_GET,		/* user->kernel request/get-response */
 	TASKSTATS_CMD_NEW,		/* kernel->user event */
 	__TASKSTATS_CMD_MAX,
 };

 #define TASKSTATS_CMD_MAX (__TASKSTATS_CMD_MAX - 1)

 enum {
 	TASKSTATS_TYPE_UNSPEC = 0,	/* Reserved */
 	TASKSTATS_TYPE_PID,		/* Process id */
 	TASKSTATS_TYPE_TGID,		/* Thread group id */
 	TASKSTATS_TYPE_STATS,		/* taskstats structure */
 	TASKSTATS_TYPE_AGGR_PID,	/* contains pid + stats */
 	TASKSTATS_TYPE_AGGR_TGID,	/* contains tgid + stats */
 	TASKSTATS_TYPE_NULL,		/* contains nothing */
 	__TASKSTATS_TYPE_MAX,
 };

 #define TASKSTATS_TYPE_MAX (__TASKSTATS_TYPE_MAX - 1)

 enum {
 	TASKSTATS_CMD_ATTR_UNSPEC = 0,
 	TASKSTATS_CMD_ATTR_PID,
 	TASKSTATS_CMD_ATTR_TGID,
 	TASKSTATS_CMD_ATTR_REGISTER_CPUMASK,
 	TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK,
 	__TASKSTATS_CMD_ATTR_MAX,
 };

 #define TASKSTATS_CMD_ATTR_MAX (__TASKSTATS_CMD_ATTR_MAX - 1)

 /* NETLINK_GENERIC related info */

 #define TASKSTATS_GENL_NAME	"TASKSTATS"
 #define TASKSTATS_GENL_VERSION	0x1

 #endif /* _LINUX_TASKSTATS_H */
	/* taskstats.h - exporting per-task statistics
	*
	* Copyright (C) Shailabh Nagar, IBM Corp. 2006
	* (C) Balbir Singh, IBM Corp. 2006
	* (C) Jay Lan, SGI, 2006
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of version 2.1 of the GNU Lesser General Public License
	* as published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it would be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	*/

	#ifndef _LINUX_TASKSTATS_H
	#define _LINUX_TASKSTATS_H

	#include <linux/types.h>

	/* Format for per-task data returned to userland when
	* - a task exits
	* - listener requests stats for a task
	*
	* The struct is versioned. Newer versions should only add fields to
	* the bottom of the struct to maintain backward compatibility.
	*
	*
	* To add new fields
	* a) bump up TASKSTATS_VERSION
	* b) add comment indicating new version number at end of struct
	* c) add new fields after version comment; maintain 64-bit alignment
	*/


	#define TASKSTATS_VERSION 8
	#define TS_COMM_LEN 32 /* should be >= TASK_COMM_LEN
	* in linux/sched.h */

	struct taskstats {

	/* The version number of this struct. This field is always set to
	* TAKSTATS_VERSION, which is defined in <linux/taskstats.h>.
	* Each time the struct is changed, the value should be incremented.
	*/
	__u16 version;
	__u32 ac_exitcode; /* Exit status */

	/* The accounting flags of a task as defined in <linux/acct.h>
	* Defined values are AFORK, ASU, ACOMPAT, ACORE, and AXSIG.
	*/
	__u8 ac_flag; /* Record flags */
	__u8 ac_nice; /* task_nice */

	/* Delay accounting fields start
	*
	* All values, until comment "Delay accounting fields end" are
	* available only if delay accounting is enabled, even though the last
	* few fields are not delays
	*
	* xxx_count is the number of delay values recorded
	* xxx_delay_total is the corresponding cumulative delay in nanoseconds
	*
	* xxx_delay_total wraps around to zero on overflow
	* xxx_count incremented regardless of overflow
	*/

	/* Delay waiting for cpu, while runnable
	* count, delay_total NOT updated atomically
	*/
	__u64 cpu_count __attribute__((aligned(8)));
	__u64 cpu_delay_total;

	/* Following four fields atomically updated using task->delays->lock */

	/* Delay waiting for synchronous block I/O to complete
	* does not account for delays in I/O submission
	*/
	__u64 blkio_count;
	__u64 blkio_delay_total;

	/* Delay waiting for page fault I/O (swap in only) */
	__u64 swapin_count;
	__u64 swapin_delay_total;

	/* cpu "wall-clock" running time
	* On some architectures, value will adjust for cpu time stolen
	* from the kernel in involuntary waits due to virtualization.
	* Value is cumulative, in nanoseconds, without a corresponding count
	* and wraps around to zero silently on overflow
	*/
	__u64 cpu_run_real_total;

	/* cpu "virtual" running time
	* Uses time intervals seen by the kernel i.e. no adjustment
	* for kernel's involuntary waits due to virtualization.
	* Value is cumulative, in nanoseconds, without a corresponding count
	* and wraps around to zero silently on overflow
	*/
	__u64 cpu_run_virtual_total;
	/* Delay accounting fields end */
	/* version 1 ends here */

	/* Basic Accounting Fields start */
	char ac_comm[TS_COMM_LEN]; /* Command name */
	__u8 ac_sched __attribute__((aligned(8)));
	/* Scheduling discipline */
	__u8 ac_pad[3];
	__u32 ac_uid __attribute__((aligned(8)));
	/* User ID */
	__u32 ac_gid; /* Group ID */
	__u32 ac_pid; /* Process ID */
	__u32 ac_ppid; /* Parent process ID */
	__u32 ac_btime; /* Begin time [sec since 1970] */
	__u64 ac_etime __attribute__((aligned(8)));
	/* Elapsed time [usec] */
	__u64 ac_utime; /* User CPU time [usec] */
	__u64 ac_stime; /* SYstem CPU time [usec] */
	__u64 ac_minflt; /* Minor Page Fault Count */
	__u64 ac_majflt; /* Major Page Fault Count */
	/* Basic Accounting Fields end */

	/* Extended accounting fields start */
	/* Accumulated RSS usage in duration of a task, in MBytes-usecs.
	* The current rss usage is added to this counter every time
	* a tick is charged to a task's system time. So, at the end we
	* will have memory usage multiplied by system time. Thus an
	* average usage per system time unit can be calculated.
	*/
	__u64 coremem; /* accumulated RSS usage in MB-usec */
	/* Accumulated virtual memory usage in duration of a task.
	* Same as acct_rss_mem1 above except that we keep track of VM usage.
	*/
	__u64 virtmem; /* accumulated VM usage in MB-usec */

	/* High watermark of RSS and virtual memory usage in duration of
	* a task, in KBytes.
	*/
	__u64 hiwater_rss; /* High-watermark of RSS usage, in KB */
	__u64 hiwater_vm; /* High-water VM usage, in KB */

	/* The following four fields are I/O statistics of a task. */
	__u64 read_char; /* bytes read */
	__u64 write_char; /* bytes written */
	__u64 read_syscalls; /* read syscalls */
	__u64 write_syscalls; /* write syscalls */
	/* Extended accounting fields end */

	#define TASKSTATS_HAS_IO_ACCOUNTING
	/* Per-task storage I/O accounting starts */
	__u64 read_bytes; /* bytes of read I/O */
	__u64 write_bytes; /* bytes of write I/O */
	__u64 cancelled_write_bytes; /* bytes of cancelled write I/O */

	__u64 nvcsw; /* voluntary_ctxt_switches */
	__u64 nivcsw; /* nonvoluntary_ctxt_switches */

	/* time accounting for SMT machines */
	__u64 ac_utimescaled; /* utime scaled on frequency etc */
	__u64 ac_stimescaled; /* stime scaled on frequency etc */
	__u64 cpu_scaled_run_real_total; /* scaled cpu_run_real_total */

	/* Delay waiting for memory reclaim */
	__u64 freepages_count;
	__u64 freepages_delay_total;
	};


	/*
	* Commands sent from userspace
	* Not versioned. New commands should only be inserted at the enum's end
	* prior to __TASKSTATS_CMD_MAX
	*/

	enum {
	TASKSTATS_CMD_UNSPEC = 0, /* Reserved */
	TASKSTATS_CMD_GET, /* user->kernel request/get-response */
	TASKSTATS_CMD_NEW, /* kernel->user event */
	__TASKSTATS_CMD_MAX,
	};

	#define TASKSTATS_CMD_MAX (__TASKSTATS_CMD_MAX - 1)

	enum {
	TASKSTATS_TYPE_UNSPEC = 0, /* Reserved */
	TASKSTATS_TYPE_PID, /* Process id */
	TASKSTATS_TYPE_TGID, /* Thread group id */
	TASKSTATS_TYPE_STATS, /* taskstats structure */
	TASKSTATS_TYPE_AGGR_PID, /* contains pid + stats */
	TASKSTATS_TYPE_AGGR_TGID, /* contains tgid + stats */
	TASKSTATS_TYPE_NULL, /* contains nothing */
	__TASKSTATS_TYPE_MAX,
	};

	#define TASKSTATS_TYPE_MAX (__TASKSTATS_TYPE_MAX - 1)

	enum {
	TASKSTATS_CMD_ATTR_UNSPEC = 0,
	TASKSTATS_CMD_ATTR_PID,
	TASKSTATS_CMD_ATTR_TGID,
	TASKSTATS_CMD_ATTR_REGISTER_CPUMASK,
	TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK,
	__TASKSTATS_CMD_ATTR_MAX,
	};

	#define TASKSTATS_CMD_ATTR_MAX (__TASKSTATS_CMD_ATTR_MAX - 1)

	/* NETLINK_GENERIC related info */

	#define TASKSTATS_GENL_NAME "TASKSTATS"
	#define TASKSTATS_GENL_VERSION 0x1

	#endif /* _LINUX_TASKSTATS_H */