73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
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/*
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* tsacct.c - System accounting over taskstats interface
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*
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* Copyright (C) Jay Lan, <jlan@sgi.com>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/tsacct_kern.h>
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#include <linux/acct.h>
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#define USEC_PER_TICK (USEC_PER_SEC/HZ)
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/*
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* fill in basic accounting fields
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*/
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void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
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{
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struct timespec uptime, ts;
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s64 ac_etime;
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BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
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/* calculate task elapsed time in timespec */
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do_posix_clock_monotonic_gettime(&uptime);
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ts = timespec_sub(uptime, current->group_leader->start_time);
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/* rebase elapsed time to usec */
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ac_etime = timespec_to_ns(&ts);
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do_div(ac_etime, NSEC_PER_USEC);
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stats->ac_etime = ac_etime;
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stats->ac_btime = xtime.tv_sec - ts.tv_sec;
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if (thread_group_leader(tsk)) {
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stats->ac_exitcode = tsk->exit_code;
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if (tsk->flags & PF_FORKNOEXEC)
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stats->ac_flag |= AFORK;
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}
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if (tsk->flags & PF_SUPERPRIV)
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stats->ac_flag |= ASU;
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if (tsk->flags & PF_DUMPCORE)
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stats->ac_flag |= ACORE;
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if (tsk->flags & PF_SIGNALED)
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stats->ac_flag |= AXSIG;
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stats->ac_nice = task_nice(tsk);
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stats->ac_sched = tsk->policy;
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stats->ac_uid = tsk->uid;
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stats->ac_gid = tsk->gid;
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stats->ac_pid = tsk->pid;
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stats->ac_ppid = (tsk->parent) ? tsk->parent->pid : 0;
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stats->ac_utime = cputime_to_msecs(tsk->utime) * USEC_PER_MSEC;
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stats->ac_stime = cputime_to_msecs(tsk->stime) * USEC_PER_MSEC;
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stats->ac_minflt = tsk->min_flt;
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stats->ac_majflt = tsk->maj_flt;
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/* Each process gets a minimum of one usec cpu time */
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if ((stats->ac_utime == 0) && (stats->ac_stime == 0)) {
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stats->ac_stime = 1;
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}
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strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
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}
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