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>
25 #define USEC_PER_TICK (USEC_PER_SEC/HZ)
27 * fill in basic accounting fields
29 void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
31 struct timespec uptime, ts;
34 BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
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;
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)) {
70 strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
74 #ifdef CONFIG_TASK_XACCT
76 * fill in extended accounting fields
78 void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
80 stats->acct_rss_mem1 = p->acct_rss_mem1;
81 stats->acct_vm_mem1 = p->acct_vm_mem1;
83 stats->hiwater_rss = p->mm->hiwater_rss;
84 stats->hiwater_vm = p->mm->hiwater_vm;
86 stats->read_char = p->rchar;
87 stats->write_char = p->wchar;
88 stats->read_syscalls = p->syscr;
89 stats->write_syscalls = p->syscw;