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>
23 #include <linux/jiffies.h>
27 * fill in basic accounting fields
29 void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
31 const struct cred *tcred;
32 struct timespec uptime, ts;
35 BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
37 /* calculate task elapsed time in timespec */
38 do_posix_clock_monotonic_gettime(&uptime);
39 ts = timespec_sub(uptime, tsk->start_time);
40 /* rebase elapsed time to usec (should never be negative) */
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 = get_seconds() - 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;
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_pid = tsk->pid;
60 tcred = __task_cred(tsk);
61 stats->ac_uid = tcred->uid;
62 stats->ac_gid = tcred->gid;
63 stats->ac_ppid = pid_alive(tsk) ?
64 rcu_dereference(tsk->real_parent)->tgid : 0;
66 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);
70 stats->ac_minflt = tsk->min_flt;
71 stats->ac_majflt = tsk->maj_flt;
73 strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
77 #ifdef CONFIG_TASK_XACCT
82 * fill in extended accounting fields
84 void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
88 /* convert pages-usec to Mbyte-usec */
89 stats->coremem = p->acct_rss_mem1 * PAGE_SIZE / MB;
90 stats->virtmem = p->acct_vm_mem1 * PAGE_SIZE / MB;
93 /* adjust to KB unit */
94 stats->hiwater_rss = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB;
95 stats->hiwater_vm = get_mm_hiwater_vm(mm) * PAGE_SIZE / KB;
98 stats->read_char = p->ioac.rchar;
99 stats->write_char = p->ioac.wchar;
100 stats->read_syscalls = p->ioac.syscr;
101 stats->write_syscalls = p->ioac.syscw;
102 #ifdef CONFIG_TASK_IO_ACCOUNTING
103 stats->read_bytes = p->ioac.read_bytes;
104 stats->write_bytes = p->ioac.write_bytes;
105 stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes;
107 stats->read_bytes = 0;
108 stats->write_bytes = 0;
109 stats->cancelled_write_bytes = 0;
116 * acct_update_integrals - update mm integral fields in task_struct
117 * @tsk: task_struct for accounting
119 void acct_update_integrals(struct task_struct *tsk)
121 if (likely(tsk->mm)) {
122 cputime_t time, dtime;
123 struct timeval value;
127 local_irq_save(flags);
128 time = tsk->stime + tsk->utime;
129 dtime = cputime_sub(time, tsk->acct_timexpd);
130 jiffies_to_timeval(cputime_to_jiffies(dtime), &value);
131 delta = value.tv_sec;
132 delta = delta * USEC_PER_SEC + value.tv_usec;
136 tsk->acct_timexpd = time;
137 tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
138 tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
140 local_irq_restore(flags);
145 * acct_clear_integrals - clear the mm integral fields in task_struct
146 * @tsk: task_struct whose accounting fields are cleared
148 void acct_clear_integrals(struct task_struct *tsk)
150 tsk->acct_timexpd = 0;
151 tsk->acct_rss_mem1 = 0;
152 tsk->acct_vm_mem1 = 0;