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f3cef7a9 JL |
1 | /* |
2 | * tsacct.c - System accounting over taskstats interface | |
3 | * | |
4 | * Copyright (C) Jay Lan, <jlan@sgi.com> | |
5 | * | |
6 | * | |
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. | |
11 | * | |
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. | |
16 | * | |
17 | */ | |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/sched.h> | |
21 | #include <linux/tsacct_kern.h> | |
22 | #include <linux/acct.h> | |
db5fed26 | 23 | #include <linux/jiffies.h> |
f3cef7a9 JL |
24 | |
25 | ||
26 | #define USEC_PER_TICK (USEC_PER_SEC/HZ) | |
27 | /* | |
28 | * fill in basic accounting fields | |
29 | */ | |
30 | void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk) | |
31 | { | |
32 | struct timespec uptime, ts; | |
33 | s64 ac_etime; | |
34 | ||
35 | BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN); | |
36 | ||
37 | /* calculate task elapsed time in timespec */ | |
38 | do_posix_clock_monotonic_gettime(&uptime); | |
05d5bcd6 | 39 | ts = timespec_sub(uptime, tsk->start_time); |
f3cef7a9 JL |
40 | /* rebase elapsed time to usec */ |
41 | ac_etime = timespec_to_ns(&ts); | |
42 | do_div(ac_etime, NSEC_PER_USEC); | |
43 | stats->ac_etime = ac_etime; | |
44 | stats->ac_btime = xtime.tv_sec - ts.tv_sec; | |
45 | if (thread_group_leader(tsk)) { | |
46 | stats->ac_exitcode = tsk->exit_code; | |
47 | if (tsk->flags & PF_FORKNOEXEC) | |
48 | stats->ac_flag |= AFORK; | |
49 | } | |
50 | if (tsk->flags & PF_SUPERPRIV) | |
51 | stats->ac_flag |= ASU; | |
52 | if (tsk->flags & PF_DUMPCORE) | |
53 | stats->ac_flag |= ACORE; | |
54 | if (tsk->flags & PF_SIGNALED) | |
55 | stats->ac_flag |= AXSIG; | |
56 | stats->ac_nice = task_nice(tsk); | |
57 | stats->ac_sched = tsk->policy; | |
58 | stats->ac_uid = tsk->uid; | |
59 | stats->ac_gid = tsk->gid; | |
60 | stats->ac_pid = tsk->pid; | |
05d5bcd6 ON |
61 | rcu_read_lock(); |
62 | stats->ac_ppid = pid_alive(tsk) ? | |
63 | rcu_dereference(tsk->real_parent)->tgid : 0; | |
64 | rcu_read_unlock(); | |
f3cef7a9 JL |
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_minflt = tsk->min_flt; | |
68 | stats->ac_majflt = tsk->maj_flt; | |
f3cef7a9 JL |
69 | |
70 | strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm)); | |
71 | } | |
72 | ||
9acc1853 JL |
73 | |
74 | #ifdef CONFIG_TASK_XACCT | |
db5fed26 JL |
75 | |
76 | #define KB 1024 | |
77 | #define MB (1024*KB) | |
9acc1853 JL |
78 | /* |
79 | * fill in extended accounting fields | |
80 | */ | |
81 | void xacct_add_tsk(struct taskstats *stats, struct task_struct *p) | |
82 | { | |
f0ec1aaf ON |
83 | struct mm_struct *mm; |
84 | ||
db5fed26 JL |
85 | /* convert pages-jiffies to Mbyte-usec */ |
86 | stats->coremem = jiffies_to_usecs(p->acct_rss_mem1) * PAGE_SIZE / MB; | |
87 | stats->virtmem = jiffies_to_usecs(p->acct_vm_mem1) * PAGE_SIZE / MB; | |
f0ec1aaf ON |
88 | mm = get_task_mm(p); |
89 | if (mm) { | |
db5fed26 | 90 | /* adjust to KB unit */ |
f0ec1aaf ON |
91 | stats->hiwater_rss = mm->hiwater_rss * PAGE_SIZE / KB; |
92 | stats->hiwater_vm = mm->hiwater_vm * PAGE_SIZE / KB; | |
93 | mmput(mm); | |
9acc1853 JL |
94 | } |
95 | stats->read_char = p->rchar; | |
96 | stats->write_char = p->wchar; | |
97 | stats->read_syscalls = p->syscr; | |
98 | stats->write_syscalls = p->syscw; | |
4a7864ca AM |
99 | #ifdef CONFIG_TASK_IO_ACCOUNTING |
100 | stats->read_bytes = p->ioac.read_bytes; | |
101 | stats->write_bytes = p->ioac.write_bytes; | |
102 | stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes; | |
103 | #else | |
104 | stats->read_bytes = 0; | |
105 | stats->write_bytes = 0; | |
106 | stats->cancelled_write_bytes = 0; | |
107 | #endif | |
9acc1853 | 108 | } |
db5fed26 JL |
109 | #undef KB |
110 | #undef MB | |
8f0ab514 JL |
111 | |
112 | /** | |
113 | * acct_update_integrals - update mm integral fields in task_struct | |
114 | * @tsk: task_struct for accounting | |
115 | */ | |
116 | void acct_update_integrals(struct task_struct *tsk) | |
117 | { | |
118 | if (likely(tsk->mm)) { | |
db5fed26 JL |
119 | long delta = cputime_to_jiffies( |
120 | cputime_sub(tsk->stime, tsk->acct_stimexpd)); | |
8f0ab514 JL |
121 | |
122 | if (delta == 0) | |
123 | return; | |
124 | tsk->acct_stimexpd = tsk->stime; | |
125 | tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm); | |
126 | tsk->acct_vm_mem1 += delta * tsk->mm->total_vm; | |
127 | } | |
128 | } | |
129 | ||
130 | /** | |
131 | * acct_clear_integrals - clear the mm integral fields in task_struct | |
132 | * @tsk: task_struct whose accounting fields are cleared | |
133 | */ | |
134 | void acct_clear_integrals(struct task_struct *tsk) | |
135 | { | |
136 | tsk->acct_stimexpd = 0; | |
137 | tsk->acct_rss_mem1 = 0; | |
138 | tsk->acct_vm_mem1 = 0; | |
139 | } | |
9acc1853 | 140 | #endif |