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[PATCH] csa accounting taskstats update

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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>
This commit is contained in:
Jay Lan 2006-09-30 23:29:00 -07:00 • committed by Linus Torvalds
parent 8f0ab51479
commit db5fed26b2
4 changed files with 207 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

25
kernel/tsacct.c
View file

@ -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;