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authorJay Lan <jlan@sgi.com>2006-09-30 23:29:00 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-01 00:39:29 -0700
commitdb5fed26b2e0beed939b773dd5896077a1794d65 (patch)
treebe7630821744aae53b2431383ef0b304a87f1268 /kernel/tsacct.c
parent8f0ab5147951267134612570604cf8341901a80c (diff)
[PATCH] csa accounting taskstats update
ChangeLog: Feedbacks from Andrew Morton: - define TS_COMM_LEN to 32 - change acct_stimexpd field of task_struct to be of cputime_t, which is to be used to save the tsk->stime of last timer interrupt update. - a new Documentation/accounting/taskstats-struct.txt to describe fields of taskstats struct. Feedback from Balbir Singh: - keep the stime of a task to be zero when both stime and utime are zero as recoreded in task_struct. Misc: - convert accumulated RSS/VM from platform dependent pages-ticks to MBytes-usecs in the kernel 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> 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.c25
1 files changed, 14 insertions, 11 deletions
diff --git a/kernel/tsacct.c b/kernel/tsacct.c
index 47c71daa416f..db443221ba5b 100644
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -20,6 +20,7 @@
#include <linux/sched.h>
#include <linux/tsacct_kern.h>
#include <linux/acct.h>
+#include <linux/jiffies.h>
#define USEC_PER_TICK (USEC_PER_SEC/HZ)
@@ -62,33 +63,35 @@ void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
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));
}
#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)
{
- stats->acct_rss_mem1 = p->acct_rss_mem1;
- stats->acct_vm_mem1 = p->acct_vm_mem1;
+ /* convert pages-jiffies to Mbyte-usec */
+ stats->coremem = jiffies_to_usecs(p->acct_rss_mem1) * PAGE_SIZE / MB;
+ stats->virtmem = jiffies_to_usecs(p->acct_vm_mem1) * PAGE_SIZE / MB;
if (p->mm) {
- stats->hiwater_rss = p->mm->hiwater_rss;
- stats->hiwater_vm = p->mm->hiwater_vm;
+ /* adjust to KB unit */
+ stats->hiwater_rss = p->mm->hiwater_rss * PAGE_SIZE / KB;
+ stats->hiwater_vm = p->mm->hiwater_vm * PAGE_SIZE / KB;
}
stats->read_char = p->rchar;
stats->write_char = p->wchar;
stats->read_syscalls = p->syscr;
stats->write_syscalls = p->syscw;
}
-
+#undef KB
+#undef MB
/**
* acct_update_integrals - update mm integral fields in task_struct
@@ -97,8 +100,8 @@ void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
void acct_update_integrals(struct task_struct *tsk)
{
if (likely(tsk->mm)) {
- long delta =
- cputime_to_jiffies(tsk->stime) - tsk->acct_stimexpd;
+ long delta = cputime_to_jiffies(
+ cputime_sub(tsk->stime, tsk->acct_stimexpd));
if (delta == 0)
return;

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