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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> | |
23 | ||
24 | ||
25 | #define USEC_PER_TICK (USEC_PER_SEC/HZ) | |
26 | /* | |
27 | * fill in basic accounting fields | |
28 | */ | |
29 | void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk) | |
30 | { | |
31 | struct timespec uptime, ts; | |
32 | s64 ac_etime; | |
33 | ||
34 | BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN); | |
35 | ||
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; | |
48 | } | |
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)) { | |
67 | stats->ac_stime = 1; | |
68 | } | |
69 | ||
70 | strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm)); | |
71 | } | |
72 | ||
9acc1853 JL |
73 | |
74 | #ifdef CONFIG_TASK_XACCT | |
75 | /* | |
76 | * fill in extended accounting fields | |
77 | */ | |
78 | void xacct_add_tsk(struct taskstats *stats, struct task_struct *p) | |
79 | { | |
80 | stats->acct_rss_mem1 = p->acct_rss_mem1; | |
81 | stats->acct_vm_mem1 = p->acct_vm_mem1; | |
82 | if (p->mm) { | |
83 | stats->hiwater_rss = p->mm->hiwater_rss; | |
84 | stats->hiwater_vm = p->mm->hiwater_vm; | |
85 | } | |
86 | stats->read_char = p->rchar; | |
87 | stats->write_char = p->wchar; | |
88 | stats->read_syscalls = p->syscr; | |
89 | stats->write_syscalls = p->syscw; | |
90 | } | |
91 | #endif |