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/include/linux/taskstats.h

https://github.com/airy09/android_kernel_sony_apq8064
C Header | 213 lines | 81 code | 34 blank | 98 comment | 0 complexity | f5f599f5ade515b81964e58211a4d2fb MD5 | raw file
  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	8
 37#define TS_COMM_LEN		32	/* should be >= TASK_COMM_LEN
 38					 * in linux/sched.h */
 39
 40struct 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
175enum {
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
184enum {
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_NULL,		/* contains nothing */
192	__TASKSTATS_TYPE_MAX,
193};
194
195#define TASKSTATS_TYPE_MAX (__TASKSTATS_TYPE_MAX - 1)
196
197enum {
198	TASKSTATS_CMD_ATTR_UNSPEC = 0,
199	TASKSTATS_CMD_ATTR_PID,
200	TASKSTATS_CMD_ATTR_TGID,
201	TASKSTATS_CMD_ATTR_REGISTER_CPUMASK,
202	TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK,
203	__TASKSTATS_CMD_ATTR_MAX,
204};
205
206#define TASKSTATS_CMD_ATTR_MAX (__TASKSTATS_CMD_ATTR_MAX - 1)
207
208/* NETLINK_GENERIC related info */
209
210#define TASKSTATS_GENL_NAME	"TASKSTATS"
211#define TASKSTATS_GENL_VERSION	0x1
212
213#endif /* _LINUX_TASKSTATS_H */