2 * tsacct.c - System accounting over taskstats interface
4 * Copyright (C) Jay Lan, <jlan@sgi.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
19 #include <linux/kernel.h>
20 #include <linux/sched.h>
21 #include <linux/tsacct_kern.h>
22 #include <linux/acct.h>
23 #include <linux/jiffies.h>
26 * fill in basic accounting fields
28 void bacct_add_tsk(struct taskstats
*stats
, struct task_struct
*tsk
)
30 const struct cred
*tcred
;
31 struct timespec uptime
, ts
;
34 BUILD_BUG_ON(TS_COMM_LEN
< TASK_COMM_LEN
);
36 /* calculate task elapsed time in timespec */
37 do_posix_clock_monotonic_gettime(&uptime
);
38 ts
= timespec_sub(uptime
, tsk
->start_time
);
39 /* rebase elapsed time to usec (should never be negative) */
40 ac_etime
= timespec_to_ns(&ts
);
41 do_div(ac_etime
, NSEC_PER_USEC
);
42 stats
->ac_etime
= ac_etime
;
43 stats
->ac_btime
= get_seconds() - ts
.tv_sec
;
44 if (thread_group_leader(tsk
)) {
45 stats
->ac_exitcode
= tsk
->exit_code
;
46 if (tsk
->flags
& PF_FORKNOEXEC
)
47 stats
->ac_flag
|= AFORK
;
49 if (tsk
->flags
& PF_SUPERPRIV
)
50 stats
->ac_flag
|= ASU
;
51 if (tsk
->flags
& PF_DUMPCORE
)
52 stats
->ac_flag
|= ACORE
;
53 if (tsk
->flags
& PF_SIGNALED
)
54 stats
->ac_flag
|= AXSIG
;
55 stats
->ac_nice
= task_nice(tsk
);
56 stats
->ac_sched
= tsk
->policy
;
57 stats
->ac_pid
= tsk
->pid
;
59 tcred
= __task_cred(tsk
);
60 stats
->ac_uid
= tcred
->uid
;
61 stats
->ac_gid
= tcred
->gid
;
62 stats
->ac_ppid
= pid_alive(tsk
) ?
63 rcu_dereference(tsk
->real_parent
)->tgid
: 0;
65 stats
->ac_utime
= cputime_to_msecs(tsk
->utime
) * USEC_PER_MSEC
;
66 stats
->ac_stime
= cputime_to_msecs(tsk
->stime
) * USEC_PER_MSEC
;
67 stats
->ac_utimescaled
=
68 cputime_to_msecs(tsk
->utimescaled
) * USEC_PER_MSEC
;
69 stats
->ac_stimescaled
=
70 cputime_to_msecs(tsk
->stimescaled
) * USEC_PER_MSEC
;
71 stats
->ac_minflt
= tsk
->min_flt
;
72 stats
->ac_majflt
= tsk
->maj_flt
;
74 strncpy(stats
->ac_comm
, tsk
->comm
, sizeof(stats
->ac_comm
));
78 #ifdef CONFIG_TASK_XACCT
83 * fill in extended accounting fields
85 void xacct_add_tsk(struct taskstats
*stats
, struct task_struct
*p
)
89 /* convert pages-usec to Mbyte-usec */
90 stats
->coremem
= p
->acct_rss_mem1
* PAGE_SIZE
/ MB
;
91 stats
->virtmem
= p
->acct_vm_mem1
* PAGE_SIZE
/ MB
;
94 /* adjust to KB unit */
95 stats
->hiwater_rss
= get_mm_hiwater_rss(mm
) * PAGE_SIZE
/ KB
;
96 stats
->hiwater_vm
= get_mm_hiwater_vm(mm
) * PAGE_SIZE
/ KB
;
99 stats
->read_char
= p
->ioac
.rchar
;
100 stats
->write_char
= p
->ioac
.wchar
;
101 stats
->read_syscalls
= p
->ioac
.syscr
;
102 stats
->write_syscalls
= p
->ioac
.syscw
;
103 #ifdef CONFIG_TASK_IO_ACCOUNTING
104 stats
->read_bytes
= p
->ioac
.read_bytes
;
105 stats
->write_bytes
= p
->ioac
.write_bytes
;
106 stats
->cancelled_write_bytes
= p
->ioac
.cancelled_write_bytes
;
108 stats
->read_bytes
= 0;
109 stats
->write_bytes
= 0;
110 stats
->cancelled_write_bytes
= 0;
117 * acct_update_integrals - update mm integral fields in task_struct
118 * @tsk: task_struct for accounting
120 void acct_update_integrals(struct task_struct
*tsk
)
122 if (likely(tsk
->mm
)) {
123 cputime_t time
, dtime
;
124 struct timeval value
;
128 local_irq_save(flags
);
129 time
= tsk
->stime
+ tsk
->utime
;
130 dtime
= cputime_sub(time
, tsk
->acct_timexpd
);
131 jiffies_to_timeval(cputime_to_jiffies(dtime
), &value
);
132 delta
= value
.tv_sec
;
133 delta
= delta
* USEC_PER_SEC
+ value
.tv_usec
;
137 tsk
->acct_timexpd
= time
;
138 tsk
->acct_rss_mem1
+= delta
* get_mm_rss(tsk
->mm
);
139 tsk
->acct_vm_mem1
+= delta
* tsk
->mm
->total_vm
;
141 local_irq_restore(flags
);
146 * acct_clear_integrals - clear the mm integral fields in task_struct
147 * @tsk: task_struct whose accounting fields are cleared
149 void acct_clear_integrals(struct task_struct
*tsk
)
151 tsk
->acct_timexpd
= 0;
152 tsk
->acct_rss_mem1
= 0;
153 tsk
->acct_vm_mem1
= 0;
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