Add a new column to the output of vmstat -z to indicate the number

of times the system was forced to sleep when requesting a new allocation.

Expand the debugger hook, db_show_uma, to display these results as well.

This has proven to be very useful in out of memory situations when
it is not known why systems have become sluggish or fail in odd ways.

Reviewed by:	rwatson alc
Approved by:	scottl (mentor) peter
Obtained from:	Yahoo Inc.

1 files changed, 5 insertions, 4 deletions

diff --git a/usr.bin/vmstat/vmstat.c b/usr.bin/vmstat/vmstat.c
index 4105a36..7583142 100644
--- a/usr.bin/vmstat/vmstat.c
+++ b/usr.bin/vmstat/vmstat.c
@@ -1294,16 +1294,17 @@ domemstat_zone(void)
 				    memstat_strerror(error));
 		}
 	}
-	printf("%-20s %8s  %8s  %8s  %8s  %8s  %8s\n\n", "ITEM", "SIZE",
-	    "LIMIT", "USED", "FREE", "REQUESTS", "FAILURES");
+	printf("%-20s %6s %6s %8s %8s %8s %4s %4s\n\n", "ITEM", "SIZE",
+	    "LIMIT", "USED", "FREE", "REQ", "FAIL", "SLEEP");
 	for (mtp = memstat_mtl_first(mtlp); mtp != NULL;
 	    mtp = memstat_mtl_next(mtp)) {
 		strlcpy(name, memstat_get_name(mtp), MEMTYPE_MAXNAME);
 		strcat(name, ":");
-		printf("%-20s %8llu, %8llu, %8llu, %8llu, %8llu, %8llu\n", name,
+		printf("%-20s %6llu, %6llu,%8llu,%8llu,%8llu,%4llu,%4llu\n",name,
 		    memstat_get_size(mtp), memstat_get_countlimit(mtp),
 		    memstat_get_count(mtp), memstat_get_free(mtp),
-		    memstat_get_numallocs(mtp), memstat_get_failures(mtp));
+		    memstat_get_numallocs(mtp), memstat_get_failures(mtp),
+		    memstat_get_sleeps(mtp));
 	}
 	memstat_mtl_free(mtlp);
 	printf("\n");