$NetBSD: patch-an,v 1.3 2011/09/12 11:15:33 dholland Exp $

Speed up the loop calibration.

--- src/timing.c.orig	2011-09-12 10:54:05.000000000 +0000
+++ src/timing.c
@@ -252,15 +252,15 @@ gen_iterations(workfn, clkmul)
 #ifdef DEBUG
 	printf(">> %u iteration gives %f seconds\n",num,((float)rtntime)*clkmul/1000000.);
 #endif
-	while ((time = ((float)rtntime)*clkmul) < 1000000.) {
-		/* while less than one second */
-		num <<= 1;
+	while ((time = ((float)rtntime)*clkmul) < 1000000./16) {
+		/* while less than 1/16 second */
+		num <<= 2;
 		if ((*workfn)(num, &rtntime) != 0) {
 			num >>= 1;
 #ifdef DEBUG
-			printf(">> backing off\n");
+			printf(">> backing off to %u iterations\n", num);
 #endif
-			break;
+			return num;
 		}
 #ifdef DEBUG
 		printf(">> %u iterations gives %f seconds\n",num,((float)rtntime)*clkmul/1000000.);
@@ -271,6 +271,11 @@ gen_iterations(workfn, clkmul)
 			exit(1);
 		}
 	}
+	while (time < 1000000.) {
+		/* while less than one second */
+		num <<= 1;
+		time *= 2;
+	}
 #ifdef DEBUG
 	printf(">> Choosing %u iterations\n", num);
 #endif