940389b8af
Simplify the code of include/linux/task_io_accounting.h. It is also more reasonable to have all the task i/o-related statistics in a single struct (task_io_accounting). Signed-off-by: Andrea Righi <righi.andrea@gmail.com> Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
149 lines
4.1 KiB
C
149 lines
4.1 KiB
C
/*
|
|
* 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;
|
|
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_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_utimescaled =
|
|
cputime_to_msecs(tsk->utimescaled) * USEC_PER_MSEC;
|
|
stats->ac_stimescaled =
|
|
cputime_to_msecs(tsk->stimescaled) * 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-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 = mm->hiwater_rss * PAGE_SIZE / KB;
|
|
stats->hiwater_vm = mm->hiwater_vm * 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;
|
|
u64 delta;
|
|
|
|
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)
|
|
return;
|
|
tsk->acct_timexpd = time;
|
|
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_timexpd = 0;
|
|
tsk->acct_rss_mem1 = 0;
|
|
tsk->acct_vm_mem1 = 0;
|
|
}
|
|
#endif
|