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- /*
- * tsacct.c - System accounting over taskstats interface
- *
- * Copyright (C) Jay Lan, <jlan@sgi.com>
- *
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/tsacct_kern.h>
- #include <linux/acct.h>
- #include <linux/jiffies.h>
- /*
- * fill in basic accounting fields
- */
- void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
- {
- struct timespec uptime, ts;
- s64 ac_etime;
- BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
- /* calculate task elapsed time in timespec */
- do_posix_clock_monotonic_gettime(&uptime);
- ts = timespec_sub(uptime, tsk->start_time);
- /* rebase elapsed time to usec */
- ac_etime = timespec_to_ns(&ts);
- do_div(ac_etime, NSEC_PER_USEC);
- stats->ac_etime = ac_etime;
- stats->ac_btime = xtime.tv_sec - ts.tv_sec;
- if (thread_group_leader(tsk)) {
- stats->ac_exitcode = tsk->exit_code;
- if (tsk->flags & PF_FORKNOEXEC)
- stats->ac_flag |= AFORK;
- }
- if (tsk->flags & PF_SUPERPRIV)
- stats->ac_flag |= ASU;
- if (tsk->flags & PF_DUMPCORE)
- stats->ac_flag |= ACORE;
- if (tsk->flags & PF_SIGNALED)
- stats->ac_flag |= AXSIG;
- stats->ac_nice = task_nice(tsk);
- stats->ac_sched = tsk->policy;
- stats->ac_uid = tsk->uid;
- stats->ac_gid = tsk->gid;
- stats->ac_pid = tsk->pid;
- rcu_read_lock();
- stats->ac_ppid = pid_alive(tsk) ?
- rcu_dereference(tsk->real_parent)->tgid : 0;
- rcu_read_unlock();
- stats->ac_utime = cputime_to_msecs(tsk->utime) * USEC_PER_MSEC;
- stats->ac_stime = cputime_to_msecs(tsk->stime) * USEC_PER_MSEC;
- stats->ac_minflt = tsk->min_flt;
- stats->ac_majflt = tsk->maj_flt;
- strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
- }
- #ifdef CONFIG_TASK_XACCT
- #define KB 1024
- #define MB (1024*KB)
- /*
- * fill in extended accounting fields
- */
- void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
- {
- struct mm_struct *mm;
- /* convert pages-jiffies to Mbyte-usec */
- stats->coremem = jiffies_to_usecs(p->acct_rss_mem1) * PAGE_SIZE / MB;
- stats->virtmem = jiffies_to_usecs(p->acct_vm_mem1) * PAGE_SIZE / MB;
- mm = get_task_mm(p);
- if (mm) {
- /* adjust to KB unit */
- stats->hiwater_rss = mm->hiwater_rss * PAGE_SIZE / KB;
- stats->hiwater_vm = mm->hiwater_vm * PAGE_SIZE / KB;
- mmput(mm);
- }
- stats->read_char = p->rchar;
- stats->write_char = p->wchar;
- stats->read_syscalls = p->syscr;
- stats->write_syscalls = p->syscw;
- #ifdef CONFIG_TASK_IO_ACCOUNTING
- stats->read_bytes = p->ioac.read_bytes;
- stats->write_bytes = p->ioac.write_bytes;
- stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes;
- #else
- stats->read_bytes = 0;
- stats->write_bytes = 0;
- stats->cancelled_write_bytes = 0;
- #endif
- }
- #undef KB
- #undef MB
- /**
- * acct_update_integrals - update mm integral fields in task_struct
- * @tsk: task_struct for accounting
- */
- void acct_update_integrals(struct task_struct *tsk)
- {
- if (likely(tsk->mm)) {
- long delta = cputime_to_jiffies(
- cputime_sub(tsk->stime, tsk->acct_stimexpd));
- if (delta == 0)
- return;
- tsk->acct_stimexpd = tsk->stime;
- tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
- tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
- }
- }
- /**
- * acct_clear_integrals - clear the mm integral fields in task_struct
- * @tsk: task_struct whose accounting fields are cleared
- */
- void acct_clear_integrals(struct task_struct *tsk)
- {
- tsk->acct_stimexpd = 0;
- tsk->acct_rss_mem1 = 0;
- tsk->acct_vm_mem1 = 0;
- }
- #endif
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