PERFORCE change 1199016 for review

[John Baldwin]

http://p4web.freebsd.org/@@1199016?ac=10

Change 1199016 by jhb at jhb_ralph on 2014/08/21 20:24:44

	Store a timestamp in the kinfo_proc structure.  Instead of
	storing a full timeval, just store a raw microseconds value as
	an int.  Note that we don't care about wrapping as the point
	of the stamp is to compute a delta between updates.

Affected files ...

.. //depot/projects/smpng/sys/kern/kern_proc.c#135 edit
.. //depot/projects/smpng/sys/sys/user.h#58 edit

Differences ...

==== //depot/projects/smpng/sys/kern/kern_proc.c#135 (text+ko) ====

@@ -790,6 +790,7 @@
 	struct session *sp;
 	struct ucred *cred;
 	struct sigacts *ps;
+	struct timeval uptime;
 
 	PROC_LOCK_ASSERT(p, MA_OWNED);
 	bzero(kp, sizeof(*kp));
@@ -870,6 +871,9 @@
 	kp->ki_fibnum = p->p_fibnum;
 	kp->ki_start = p->p_stats->p_start;
 	timevaladd(&kp->ki_start, &boottime);
+	microuptime(&uptime);
+	/* Wrapping is ok as this is only used to compute deltas. */
+	kp->ki_stamp = uptime.tv_sec * 1000000 + uptime.tv_usec;
 	PROC_SLOCK(p);
 	rufetch(p, &kp->ki_rusage);
 	kp->ki_runtime = cputick2usec(p->p_rux.rux_runtime);

==== //depot/projects/smpng/sys/sys/user.h#58 (text+ko) ====

@@ -84,7 +84,7 @@
  * it in two places: function fill_kinfo_proc in sys/kern/kern_proc.c and
  * function kvm_proclist in lib/libkvm/kvm_proc.c .
  */
-#define	KI_NSPARE_INT	7
+#define	KI_NSPARE_INT	6
 #define	KI_NSPARE_LONG	12
 #define	KI_NSPARE_PTR	6
 
@@ -187,6 +187,7 @@
 	 */
 	char	ki_sparestrings[50];	/* spare string space */
 	int	ki_spareints[KI_NSPARE_INT];	/* spare room for growth */
+	u_int	ki_stamp;		/* timestamp of record (usec) */
 	int	ki_flag2;		/* P2_* flags */
 	int	ki_fibnum;		/* Default FIB number */
 	u_int	ki_cr_flags;		/* Credential flags */