/* * 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> #include <linux/mm.h> /* * fill in basic accounting fields */ void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk) { const struct cred *tcred; struct timespec uptime, ts; u64 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 (should never be negative) */ ac_etime = timespec_to_ns(&ts); do_div(ac_etime, NSEC_PER_USEC); stats->ac_etime = ac_etime; stats->ac_btime = get_seconds() - 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_pid = tsk->pid; rcu_read_lock(); tcred = __task_cred(tsk); stats->ac_uid = tcred->uid; stats->ac_gid = tcred->gid; stats->ac_ppid = pid_alive(tsk) ? rcu_dereference(tsk->real_parent)->tgid : 0; rcu_read_unlock(); stats->ac_utime = cputime_to_usecs(tsk->utime); stats->ac_stime = cputime_to_usecs(tsk->stime); stats->ac_utimescaled = cputime_to_usecs(tsk->utimescaled); stats->ac_stimescaled = cputime_to_usecs(tsk->stimescaled); 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-usec to Mbyte-usec */ stats->coremem = p->acct_rss_mem1 * PAGE_SIZE / MB; stats->virtmem = p->acct_vm_mem1 * PAGE_SIZE / MB; mm = get_task_mm(p); if (mm) { /* adjust to KB unit */ stats->hiwater_rss = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB; stats->hiwater_vm = get_mm_hiwater_vm(mm) * PAGE_SIZE / KB; mmput(mm); } stats->read_char = p->ioac.rchar; stats->write_char = p->ioac.wchar; stats->read_syscalls = p->ioac.syscr; stats->write_syscalls = p->ioac.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)) { cputime_t time, dtime; struct timeval value; unsigned long flags; u64 delta; local_irq_save(flags); time = tsk->stime + tsk->utime; dtime = cputime_sub(time, tsk->acct_timexpd); jiffies_to_timeval(cputime_to_jiffies(dtime), &value); delta = value.tv_sec; delta = delta * USEC_PER_SEC + value.tv_usec; if (delta == 0) goto out; tsk->acct_timexpd = time; tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm); tsk->acct_vm_mem1 += delta * tsk->mm->total_vm; out: local_irq_restore(flags); } } /** * 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_timexpd = 0; tsk->acct_rss_mem1 = 0; tsk->acct_vm_mem1 = 0; } #endif