bench: fix nextN

diff --git a/common/bench.c b/common/bench.c
index b179bf8..2e1ace5 100644 (file)
--- a/common/bench.c
+++ b/common/bench.c
@@ -64,10 +64,12 @@ void reset_timer() {
 
 static int nextN() {
        unsigned long long n = ns/N;
-       if (n == 0)
-               n = SEC;
-       else
+
+       if (n)
                n = SEC/n;
+       else
+               n = SEC;
+       n += n/4;
        if (n > N*100ULL)
                n = N*100ULL;
        else if (n <= N)