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authorJay Lan <jlan@engr.sgi.com>2006-10-01 02:28:55 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-01 03:39:29 -0400
commitf3cef7a99469afc159fec3a61b42dc7ca5b6824f (patch)
treeb1805a0d0b4a273b8ce0a245c17570ff18abdc5b /kernel/tsacct.c
parent7d1bdca9b06acb3df07329eaff72d5eaf1543287 (diff)
[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: Jay 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: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/tsacct.c')
-rw-r--r--kernel/tsacct.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/kernel/tsacct.c b/kernel/tsacct.c
new file mode 100644
index 000000000000..899067950a88
--- /dev/null
+++ b/kernel/tsacct.c
@@ -0,0 +1,72 @@
1/*
2 * tsacct.c - System accounting over taskstats interface
3 *
4 * Copyright (C) Jay Lan, <jlan@sgi.com>
5 *
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 */
18
19#include <linux/kernel.h>
20#include <linux/sched.h>
21#include <linux/tsacct_kern.h>
22#include <linux/acct.h>
23
24
25#define USEC_PER_TICK (USEC_PER_SEC/HZ)
26/*
27 * fill in basic accounting fields
28 */
29void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
30{
31 struct timespec uptime, ts;
32 s64 ac_etime;
33
34 BUILD_BUG_ON(TS_COMM_LEN < TASK_COMM_LEN);
35
36 /* calculate task elapsed time in timespec */
37 do_posix_clock_monotonic_gettime(&uptime);
38 ts = timespec_sub(uptime, current->group_leader->start_time);
39 /* rebase elapsed time to usec */
40 ac_etime = timespec_to_ns(&ts);
41 do_div(ac_etime, NSEC_PER_USEC);
42 stats->ac_etime = ac_etime;
43 stats->ac_btime = xtime.tv_sec - ts.tv_sec;
44 if (thread_group_leader(tsk)) {
45 stats->ac_exitcode = tsk->exit_code;
46 if (tsk->flags & PF_FORKNOEXEC)
47 stats->ac_flag |= AFORK;
48 }
49 if (tsk->flags & PF_SUPERPRIV)
50 stats->ac_flag |= ASU;
51 if (tsk->flags & PF_DUMPCORE)
52 stats->ac_flag |= ACORE;
53 if (tsk->flags & PF_SIGNALED)
54 stats->ac_flag |= AXSIG;
55 stats->ac_nice = task_nice(tsk);
56 stats->ac_sched = tsk->policy;
57 stats->ac_uid = tsk->uid;
58 stats->ac_gid = tsk->gid;
59 stats->ac_pid = tsk->pid;
60 stats->ac_ppid = (tsk->parent) ? tsk->parent->pid : 0;
61 stats->ac_utime = cputime_to_msecs(tsk->utime) * USEC_PER_MSEC;
62 stats->ac_stime = cputime_to_msecs(tsk->stime) * USEC_PER_MSEC;
63 stats->ac_minflt = tsk->min_flt;
64 stats->ac_majflt = tsk->maj_flt;
65 /* Each process gets a minimum of one usec cpu time */
66 if ((stats->ac_utime == 0) && (stats->ac_stime == 0)) {
67 stats->ac_stime = 1;
68 }
69
70 strncpy(stats->ac_comm, tsk->comm, sizeof(stats->ac_comm));
71}
72