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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>
KAMEZAWA Hiroyukid559db02010-03-05 13:41:39 -080024#include <linux/mm.h>
Jay Lanf3cef7a2006-09-30 23:28:55 -070025
Jay Lanf3cef7a2006-09-30 23:28:55 -070026/*
27 * fill in basic accounting fields
28 */
29void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
30{
David Howellsc69e8d92008-11-14 10:39:19 +110031 const struct cred *tcred;
Jay Lanf3cef7a2006-09-30 23:28:55 -070032 struct timespec uptime, ts;
David Howells3e85ba02008-07-25 01:48:50 -070033 u64 ac_etime;
Jay Lanf3cef7a2006-09-30 23:28:55 -070034
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);
Oleg Nesterov05d5bcd2006-10-28 10:38:50 -070039 ts = timespec_sub(uptime, tsk->start_time);
David Howells3e85ba02008-07-25 01:48:50 -070040 /* rebase elapsed time to usec (should never be negative) */
Jay Lanf3cef7a2006-09-30 23:28:55 -070041 ac_etime = timespec_to_ns(&ts);
42 do_div(ac_etime, NSEC_PER_USEC);
43 stats->ac_etime = ac_etime;
john stultz2c6b47d2007-07-24 17:47:43 -070044 stats->ac_btime = get_seconds() - ts.tv_sec;
Jay Lanf3cef7a2006-09-30 23:28:55 -070045 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;
Jay Lanf3cef7a2006-09-30 23:28:55 -070058 stats->ac_pid = tsk->pid;
Oleg Nesterov05d5bcd2006-10-28 10:38:50 -070059 rcu_read_lock();
David Howellsc69e8d92008-11-14 10:39:19 +110060 tcred = __task_cred(tsk);
61 stats->ac_uid = tcred->uid;
62 stats->ac_gid = tcred->gid;
Oleg Nesterov05d5bcd2006-10-28 10:38:50 -070063 stats->ac_ppid = pid_alive(tsk) ?
64 rcu_dereference(tsk->real_parent)->tgid : 0;
65 rcu_read_unlock();
Michael Holzheud57af9b2010-10-27 15:34:45 -070066 stats->ac_utime = cputime_to_usecs(tsk->utime);
67 stats->ac_stime = cputime_to_usecs(tsk->stime);
68 stats->ac_utimescaled = cputime_to_usecs(tsk->utimescaled);
69 stats->ac_stimescaled = cputime_to_usecs(tsk->stimescaled);
Jay Lanf3cef7a2006-09-30 23:28:55 -070070 stats->ac_minflt = tsk->min_flt;
71 stats->ac_majflt = tsk->maj_flt;
Jay Lanf3cef7a2006-09-30 23:28:55 -070072
73 strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
74}
75
Jay Lan9acc1852006-09-30 23:28:58 -070076
77#ifdef CONFIG_TASK_XACCT
Jay Landb5fed262006-09-30 23:29:00 -070078
79#define KB 1024
80#define MB (1024*KB)
Linus Torvalds58c3c3a2011-09-19 17:10:57 -070081#define KB_MASK (~(KB-1))
Jay Lan9acc1852006-09-30 23:28:58 -070082/*
83 * fill in extended accounting fields
84 */
85void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
86{
Oleg Nesterovf0ec1aa2006-10-29 22:46:43 -080087 struct mm_struct *mm;
88
Jonathan Lim49b5cf32008-07-25 01:48:40 -070089 /* 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;
Oleg Nesterovf0ec1aa2006-10-29 22:46:43 -080092 mm = get_task_mm(p);
93 if (mm) {
Jay Landb5fed262006-09-30 23:29:00 -070094 /* adjust to KB unit */
Oleg Nesterov901608d2009-01-06 14:40:29 -080095 stats->hiwater_rss = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB;
96 stats->hiwater_vm = get_mm_hiwater_vm(mm) * PAGE_SIZE / KB;
Oleg Nesterovf0ec1aa2006-10-29 22:46:43 -080097 mmput(mm);
Jay Lan9acc1852006-09-30 23:28:58 -070098 }
Linus Torvalds58c3c3a2011-09-19 17:10:57 -070099 stats->read_char = p->ioac.rchar & KB_MASK;
100 stats->write_char = p->ioac.wchar & KB_MASK;
101 stats->read_syscalls = p->ioac.syscr & KB_MASK;
102 stats->write_syscalls = p->ioac.syscw & KB_MASK;
Andrew Morton4a7864c2006-12-10 02:19:53 -0800103#ifdef CONFIG_TASK_IO_ACCOUNTING
Linus Torvalds58c3c3a2011-09-19 17:10:57 -0700104 stats->read_bytes = p->ioac.read_bytes & KB_MASK;
105 stats->write_bytes = p->ioac.write_bytes & KB_MASK;
106 stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes & KB_MASK;
Andrew Morton4a7864c2006-12-10 02:19:53 -0800107#else
108 stats->read_bytes = 0;
109 stats->write_bytes = 0;
110 stats->cancelled_write_bytes = 0;
111#endif
Jay Lan9acc1852006-09-30 23:28:58 -0700112}
Jay Landb5fed262006-09-30 23:29:00 -0700113#undef KB
114#undef MB
Jay Lan8f0ab512006-09-30 23:28:59 -0700115
116/**
117 * acct_update_integrals - update mm integral fields in task_struct
118 * @tsk: task_struct for accounting
119 */
120void acct_update_integrals(struct task_struct *tsk)
121{
122 if (likely(tsk->mm)) {
Jonathan Lim49b5cf32008-07-25 01:48:40 -0700123 cputime_t time, dtime;
124 struct timeval value;
Heiko Carstens6d5b5ac2009-03-09 13:31:59 +0100125 unsigned long flags;
Jonathan Lim49b5cf32008-07-25 01:48:40 -0700126 u64 delta;
127
Heiko Carstens6d5b5ac2009-03-09 13:31:59 +0100128 local_irq_save(flags);
Jonathan Lim49b5cf32008-07-25 01:48:40 -0700129 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;
Jay Lan8f0ab512006-09-30 23:28:59 -0700134
135 if (delta == 0)
Heiko Carstens6d5b5ac2009-03-09 13:31:59 +0100136 goto out;
Jonathan Lim49b5cf32008-07-25 01:48:40 -0700137 tsk->acct_timexpd = time;
Jay Lan8f0ab512006-09-30 23:28:59 -0700138 tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
139 tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
Heiko Carstens6d5b5ac2009-03-09 13:31:59 +0100140 out:
141 local_irq_restore(flags);
Jay Lan8f0ab512006-09-30 23:28:59 -0700142 }
143}
144
145/**
146 * acct_clear_integrals - clear the mm integral fields in task_struct
147 * @tsk: task_struct whose accounting fields are cleared
148 */
149void acct_clear_integrals(struct task_struct *tsk)
150{
Jonathan Lim49b5cf32008-07-25 01:48:40 -0700151 tsk->acct_timexpd = 0;
Jay Lan8f0ab512006-09-30 23:28:59 -0700152 tsk->acct_rss_mem1 = 0;
153 tsk->acct_vm_mem1 = 0;
154}
Jay Lan9acc1852006-09-30 23:28:58 -0700155#endif