From: Heng Li <lh3@live.co.uk>
Date: Mon, 18 Apr 2011 02:06:31 +0000 (-0400)
Subject: benchmark performance given unaligned memory
X-Git-Tag: ksprintf-final~54
X-Git-Url: http://git.kaiwu.me/postgresql/log/contrib/postgres_fdw/postgres_fdw.c?a=commitdiff_plain;h=d37245b761c212e33d28d31bb6443c7f4f824a11;p=klib.git

benchmark performance given unaligned memory
---

diff --git a/ksort_test.c b/ksort_test.c
index f34f63a..92c7d3d 100644
--- a/ksort_test.c
+++ b/ksort_test.c
@@ -34,6 +34,21 @@ int main(int argc, char *argv[])
 		}
 	}
 
+#ifndef _ALIGNED_ONLY
+	{ // test unaligned ksmall
+		srand48(11);
+		unsigned char *a;
+		int *b;
+		a = malloc(N * sizeof(int) + 1);
+		b = (int*)(a + 1);
+		for (i = 0; i < N; ++i) b[i] = (int)lrand48();
+		t1 = clock();
+		ks_introsort(int, N, b);
+		t2 = clock();
+		fprintf(stderr, "introsort [%d]: %.3lf (unaligned: 0x%lx) \n", b[10500], (double)(t2-t1)/CLOCKS_PER_SEC, (size_t)b);
+	}
+#endif
+
 	t1 = clock();
 	ks_introsort(int, N, array);
 	t2 = clock();