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>
25 #define USEC_PER_TICK (USEC_PER_SEC/HZ)
27 * fill in basic accounting fields
29 void bacct_add_tsk(struct taskstats
*stats
, struct task_struct
*tsk
)
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
, current
->group_leader
->start_time
);
39 /* rebase elapsed time to usec */
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
= xtime
.tv_sec
- 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_uid
= tsk
->uid
;
58 stats
->ac_gid
= tsk
->gid
;
59 stats
->ac_pid
= tsk
->pid
;
60 stats
->ac_ppid
= (tsk
->parent
) ? tsk
->parent
->pid
: 0;
61 stats
->ac_utime
= cputime_to_msecs(tsk
->utime
) * USEC_PER_MSEC
;
62 stats
->ac_stime
= cputime_to_msecs(tsk
->stime
) * USEC_PER_MSEC
;
63 stats
->ac_minflt
= tsk
->min_flt
;
64 stats
->ac_majflt
= tsk
->maj_flt
;
65 /* Each process gets a minimum of one usec cpu time */
66 if ((stats
->ac_utime
== 0) && (stats
->ac_stime
== 0)) {
70 strncpy(stats
->ac_comm
, tsk
->comm
, sizeof(stats
->ac_comm
));
74 #ifdef CONFIG_TASK_XACCT
76 * fill in extended accounting fields
78 void xacct_add_tsk(struct taskstats
*stats
, struct task_struct
*p
)
80 stats
->acct_rss_mem1
= p
->acct_rss_mem1
;
81 stats
->acct_vm_mem1
= p
->acct_vm_mem1
;
83 stats
->hiwater_rss
= p
->mm
->hiwater_rss
;
84 stats
->hiwater_vm
= p
->mm
->hiwater_vm
;
86 stats
->read_char
= p
->rchar
;
87 stats
->write_char
= p
->wchar
;
88 stats
->read_syscalls
= p
->syscr
;
89 stats
->write_syscalls
= p
->syscw
;
94 * acct_update_integrals - update mm integral fields in task_struct
95 * @tsk: task_struct for accounting
97 void acct_update_integrals(struct task_struct
*tsk
)
99 if (likely(tsk
->mm
)) {
101 cputime_to_jiffies(tsk
->stime
) - tsk
->acct_stimexpd
;
105 tsk
->acct_stimexpd
= tsk
->stime
;
106 tsk
->acct_rss_mem1
+= delta
* get_mm_rss(tsk
->mm
);
107 tsk
->acct_vm_mem1
+= delta
* tsk
->mm
->total_vm
;
112 * acct_clear_integrals - clear the mm integral fields in task_struct
113 * @tsk: task_struct whose accounting fields are cleared
115 void acct_clear_integrals(struct task_struct
*tsk
)
117 tsk
->acct_stimexpd
= 0;
118 tsk
->acct_rss_mem1
= 0;
119 tsk
->acct_vm_mem1
= 0;
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