blob: c122131a122f54121f239ece78f830efbaf90d69 [file] [log] [blame]
Jay Lanf3cef7a2006-09-30 23:28:55 -07001/*
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>
Jay Landb5fed262006-09-30 23:29:00 -070023#include <linux/jiffies.h>
Jay Lanf3cef7a2006-09-30 23:28:55 -070024
Jay Lanf3cef7a2006-09-30 23:28:55 -070025/*
26 * fill in basic accounting fields
27 */
28void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
29{
30 struct timespec uptime, ts;
31 s64 ac_etime;
32
33 BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
34
35 /* calculate task elapsed time in timespec */
36 do_posix_clock_monotonic_gettime(&uptime);
Oleg Nesterov05d5bcd2006-10-28 10:38:50 -070037 ts = timespec_sub(uptime, tsk->start_time);
Jay Lanf3cef7a2006-09-30 23:28:55 -070038 /* rebase elapsed time to usec */
39 ac_etime = timespec_to_ns(&ts);
40 do_div(ac_etime, NSEC_PER_USEC);
41 stats->ac_etime = ac_etime;
john stultz2c6b47d2007-07-24 17:47:43 -070042 stats->ac_btime = get_seconds() - ts.tv_sec;
Jay Lanf3cef7a2006-09-30 23:28:55 -070043 if (thread_group_leader(tsk)) {
44 stats->ac_exitcode = tsk->exit_code;
45 if (tsk->flags & PF_FORKNOEXEC)
46 stats->ac_flag |= AFORK;
47 }
48 if (tsk->flags & PF_SUPERPRIV)
49 stats->ac_flag |= ASU;
50 if (tsk->flags & PF_DUMPCORE)
51 stats->ac_flag |= ACORE;
52 if (tsk->flags & PF_SIGNALED)
53 stats->ac_flag |= AXSIG;
54 stats->ac_nice = task_nice(tsk);
55 stats->ac_sched = tsk->policy;
56 stats->ac_uid = tsk->uid;
57 stats->ac_gid = tsk->gid;
58 stats->ac_pid = tsk->pid;
Oleg Nesterov05d5bcd2006-10-28 10:38:50 -070059 rcu_read_lock();
60 stats->ac_ppid = pid_alive(tsk) ?
61 rcu_dereference(tsk->real_parent)->tgid : 0;
62 rcu_read_unlock();
Jay Lanf3cef7a2006-09-30 23:28:55 -070063 stats->ac_utime = cputime_to_msecs(tsk->utime) * USEC_PER_MSEC;
64 stats->ac_stime = cputime_to_msecs(tsk->stime) * USEC_PER_MSEC;
65 stats->ac_minflt = tsk->min_flt;
66 stats->ac_majflt = tsk->maj_flt;
Jay Lanf3cef7a2006-09-30 23:28:55 -070067
68 strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
69}
70
Jay Lan9acc1852006-09-30 23:28:58 -070071
72#ifdef CONFIG_TASK_XACCT
Jay Landb5fed262006-09-30 23:29:00 -070073
74#define KB 1024
75#define MB (1024*KB)
Jay Lan9acc1852006-09-30 23:28:58 -070076/*
77 * fill in extended accounting fields
78 */
79void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
80{
Oleg Nesterovf0ec1aa2006-10-29 22:46:43 -080081 struct mm_struct *mm;
82
Jay Landb5fed262006-09-30 23:29:00 -070083 /* convert pages-jiffies to Mbyte-usec */
84 stats->coremem = jiffies_to_usecs(p->acct_rss_mem1) * PAGE_SIZE / MB;
85 stats->virtmem = jiffies_to_usecs(p->acct_vm_mem1) * PAGE_SIZE / MB;
Oleg Nesterovf0ec1aa2006-10-29 22:46:43 -080086 mm = get_task_mm(p);
87 if (mm) {
Jay Landb5fed262006-09-30 23:29:00 -070088 /* adjust to KB unit */
Oleg Nesterovf0ec1aa2006-10-29 22:46:43 -080089 stats->hiwater_rss = mm->hiwater_rss * PAGE_SIZE / KB;
90 stats->hiwater_vm = mm->hiwater_vm * PAGE_SIZE / KB;
91 mmput(mm);
Jay Lan9acc1852006-09-30 23:28:58 -070092 }
93 stats->read_char = p->rchar;
94 stats->write_char = p->wchar;
95 stats->read_syscalls = p->syscr;
96 stats->write_syscalls = p->syscw;
Andrew Morton4a7864c2006-12-10 02:19:53 -080097#ifdef CONFIG_TASK_IO_ACCOUNTING
98 stats->read_bytes = p->ioac.read_bytes;
99 stats->write_bytes = p->ioac.write_bytes;
100 stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes;
101#else
102 stats->read_bytes = 0;
103 stats->write_bytes = 0;
104 stats->cancelled_write_bytes = 0;
105#endif
Jay Lan9acc1852006-09-30 23:28:58 -0700106}
Jay Landb5fed262006-09-30 23:29:00 -0700107#undef KB
108#undef MB
Jay Lan8f0ab512006-09-30 23:28:59 -0700109
110/**
111 * acct_update_integrals - update mm integral fields in task_struct
112 * @tsk: task_struct for accounting
113 */
114void acct_update_integrals(struct task_struct *tsk)
115{
116 if (likely(tsk->mm)) {
Jay Landb5fed262006-09-30 23:29:00 -0700117 long delta = cputime_to_jiffies(
118 cputime_sub(tsk->stime, tsk->acct_stimexpd));
Jay Lan8f0ab512006-09-30 23:28:59 -0700119
120 if (delta == 0)
121 return;
122 tsk->acct_stimexpd = tsk->stime;
123 tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
124 tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
125 }
126}
127
128/**
129 * acct_clear_integrals - clear the mm integral fields in task_struct
130 * @tsk: task_struct whose accounting fields are cleared
131 */
132void acct_clear_integrals(struct task_struct *tsk)
133{
134 tsk->acct_stimexpd = 0;
135 tsk->acct_rss_mem1 = 0;
136 tsk->acct_vm_mem1 = 0;
137}
Jay Lan9acc1852006-09-30 23:28:58 -0700138#endif