| Jay Lan | f3cef7a | 2006-09-30 23:28:55 -0700 | [diff] [blame^] | 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 | |