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authorJay Lan <jlan@engr.sgi.com>2006-09-30 23:28:55 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-01 00:39:29 -0700
commitf3cef7a99469afc159fec3a61b42dc7ca5b6824f (patch)
treeb1805a0d0b4a273b8ce0a245c17570ff18abdc5b /kernel/tsacct.c
parent7d1bdca9b06acb3df07329eaff72d5eaf1543287 (diff)
downloadlinux-sh-f3cef7a99469afc159fec3a61b42dc7ca5b6824f.tar.gz
[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 @@
+/*
+ * 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));
+}
+