linux/kernel/tsacct.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * tsacct.c - System accounting over taskstats interface
 *
 * Copyright (C) Jay Lan,	<[email protected]>
 */

#include <linux/kernel.h>
#include <linux/sched/signal.h>
#include <linux/sched/mm.h>
#include <linux/sched/cputime.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 user_namespace *user_ns,
		   struct pid_namespace *pid_ns,
		   struct taskstats *stats, struct task_struct *tsk)
{ … }


#ifdef CONFIG_TASK_XACCT

#define KB …
#define MB …
#define KB_MASK …
/*
 * fill in extended accounting fields
 */
void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
{ … }
#undef KB
#undef MB

static void __acct_update_integrals(struct task_struct *tsk,
				    u64 utime, u64 stime)
{ … }

/**
 * acct_update_integrals - update mm integral fields in task_struct
 * @tsk: task_struct for accounting
 */
void acct_update_integrals(struct task_struct *tsk)
{ … }

/**
 * acct_account_cputime - update mm integral after cputime update
 * @tsk: task_struct for accounting
 */
void acct_account_cputime(struct task_struct *tsk)
{ … }

/**
 * 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)
{ … }
#endif