Commit f3cef7a9 authored by Jay Lan's avatar Jay Lan Committed by Linus Torvalds
Browse files

[PATCH] csa: basic accounting over taskstats



Add some basic accounting fields to the taskstats struct, add a new
kernel/tsacct.c to handle basic accounting data handling upon exit.  A handle
is added to taskstats.c to invoke the basic accounting data handling.
Signed-off-by: default avatarJay Lan <jlan@sgi.com>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Jes Sorensen <jes@sgi.com>
Cc: Chris Sturtivant <csturtiv@sgi.com>
Cc: Tony Ernst <tee@sgi.com>
Cc: Guillaume Thouvenin <guillaume.thouvenin@bull.net>
Cc: "Michal Piotrowski" <michal.k.k.piotrowski@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 7d1bdca9
......@@ -2,6 +2,7 @@
*
* Copyright (C) Shailabh Nagar, IBM Corp. 2006
* (C) Balbir Singh, IBM Corp. 2006
* (C) Jay Lan, SGI, 2006
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2.1 of the GNU Lesser General Public License
......@@ -29,16 +30,18 @@
* c) add new fields after version comment; maintain 64-bit alignment
*/
#define TASKSTATS_VERSION 1
#define TASKSTATS_VERSION 2
#define TS_COMM_LEN 16 /* should sync up with TASK_COMM_LEN
* in linux/sched.h */
struct taskstats {
/* Version 1 */
__u16 version;
__u16 padding[3]; /* Userspace should not interpret the padding
* field which can be replaced by useful
* fields if struct taskstats is extended.
*/
__u32 ac_exitcode; /* Exit status */
__u8 ac_flag; /* Record flags */
__u8 ac_nice; /* task_nice */
/* Delay accounting fields start
*
......@@ -88,6 +91,22 @@ struct taskstats {
__u64 cpu_run_virtual_total;
/* Delay accounting fields end */
/* version 1 ends here */
/* Basic Accounting Fields start */
char ac_comm[TS_COMM_LEN]; /* Command name */
__u8 ac_sched; /* Scheduling discipline */
__u8 ac_pad[3];
__u32 ac_uid; /* User ID */
__u32 ac_gid; /* Group ID */
__u32 ac_pid; /* Process ID */
__u32 ac_ppid; /* Parent process ID */
__u32 ac_btime; /* Begin time [sec since 1970] */
__u64 ac_etime; /* Elapsed time [usec] */
__u64 ac_utime; /* User CPU time [usec] */
__u64 ac_stime; /* SYstem CPU time [usec] */
__u64 ac_minflt; /* Minor Page Fault */
__u64 ac_majflt; /* Major Page Fault */
/* Basic Accounting Fields end */
};
......
/*
* tsacct_kern.h - kernel header for system accounting over taskstats interface
*
* Copyright (C) Jay Lan SGI
*/
#ifndef _LINUX_TSACCT_KERN_H
#define _LINUX_TSACCT_KERN_H
#include <linux/taskstats.h>
#ifdef CONFIG_TASKSTATS
extern void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk);
#else
static inline void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
{}
#endif /* CONFIG_TASKSTATS */
#endif
......@@ -49,7 +49,7 @@ obj-$(CONFIG_SECCOMP) += seccomp.o
obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o
obj-$(CONFIG_RELAY) += relay.o
obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
obj-$(CONFIG_TASKSTATS) += taskstats.o
obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
ifneq ($(CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER),y)
# According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is
......
......@@ -18,6 +18,7 @@
#include <linux/kernel.h>
#include <linux/taskstats_kern.h>
#include <linux/tsacct_kern.h>
#include <linux/delayacct.h>
#include <linux/cpumask.h>
#include <linux/percpu.h>
......@@ -198,7 +199,10 @@ static int fill_pid(pid_t pid, struct task_struct *pidtsk,
*/
delayacct_add_tsk(stats, tsk);
/* fill in basic acct fields */
stats->version = TASKSTATS_VERSION;
bacct_add_tsk(stats, tsk);
/* Define err: label here if needed */
put_task_struct(tsk);
......
/*
* 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>
#define USEC_PER_TICK (USEC_PER_SEC/HZ)
/*
* 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, current->group_leader->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;
stats->ac_ppid = (tsk->parent) ? tsk->parent->pid : 0;
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;
/* Each process gets a minimum of one usec cpu time */
if ((stats->ac_utime == 0) && (stats->ac_stime == 0)) {
stats->ac_stime = 1;
}
strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
}
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