Some cleanups related to timecounters and weird ifdefs in <sys/time.h>.

Clean up (or if antipodic: down) some of the msgbuf stuff.

Use an inline function rather than a macro for timecounter delta.

Maintain process "on-cpu" time as 64 bits of microseconds to avoid
needless second rollover overhead.

Avoid calling microuptime the second time in mi_switch() if we do
not pass through _idle in cpu_switch()

This should reduce our context-switch overhead a bit, in particular
on pre-P5 and SMP systems.

WARNING:  Programs which muck about with struct proc in userland
will have to be fixed.

Reviewed, but found imperfect by:       bde

1 files changed, 1 insertions, 27 deletions

diff --git a/sys/ddb/db_print.c b/sys/ddb/db_print.c
index f6db84f..49a580b 100644
--- a/sys/ddb/db_print.c
+++ b/sys/ddb/db_print.c
@@ -23,7 +23,7 @@
  * any improvements or extensions that they make and grant Carnegie the
  * rights to redistribute these changes.
  *
- *	$Id: db_print.c,v 1.15 1998/05/19 11:02:23 phk Exp $
+ *	$Id: db_print.c,v 1.16 1998/05/19 18:42:06 phk Exp $
  */
 
 /*
@@ -35,8 +35,6 @@
  * Miscellaneous printing.
  */
 #include <sys/param.h>
-#include <sys/kernel.h>
-#include <sys/msgbuf.h>
 
 #include <ddb/ddb.h>
 #include <ddb/db_variables.h>
@@ -67,27 +65,3 @@ db_show_regs(dummy1, dummy2, dummy3, dummy4)
 	db_print_loc_and_inst(PC_REGS(DDB_REGS));
 }
 
-
-DB_SHOW_COMMAND(msgbuf, db_show_msgbuf)
-{
-	int i,j;
-
-	if (!msgbufmapped) {
-		db_printf("msgbuf not mapped yet\n");
-		return;
-	}
-	db_printf("msgbufp = %p\n", msgbufp);
-	db_printf("magic = %x, size = %d, r= %d, w = %d, ptr = %p\n",
-		msgbufp->msg_magic,
-		msgbufp->msg_size,
-		msgbufp->msg_bufr,
-		msgbufp->msg_bufx,
-		msgbufp->msg_ptr);
-	for (i = 0; i < msgbufp->msg_size; i++) {
-		j = msgbufp->msg_ptr[(i + msgbufp->msg_bufr) % msgbufp->msg_size];
-		if (j)
-			db_printf("%c", j);
-	}
-	db_printf("\n");
-}
-