X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=linux-tests%2Fwritebigsparse.c;h=aeb2535551b379ee96dd5e0dcf4a5c3892bcbc44;hp=0d701285d4356bd794877927437f6cc1371a6b50;hb=a7cb3a35b2bc81f1e8107b6a147d7c86681f0b84;hpb=20de150d680c2a84c4a2e0d5f0f354274c7ff9ab

diff --git a/linux-tests/writebigsparse.c b/linux-tests/writebigsparse.c
index 0d70128..aeb2535 100644
--- a/linux-tests/writebigsparse.c
+++ b/linux-tests/writebigsparse.c
@@ -6,75 +6,72 @@
 #include <unistd.h>
 #include <stdlib.h>
 
-int handle;
 
-#define N_WRITES 8000
-#define STRIDE	 1000
+#define N_WRITES 16
+#define STRIDE	 250000
 
-#define BUFFER_N 2000
-unsigned  buffer[BUFFER_N];
+#define BUFFER_N 1100
+unsigned  xxbuffer[BUFFER_N];
 
 
 void set_buffer(int n)
 {
 	int i;
 	for(i = 0; i < BUFFER_N; i++)
-		buffer[i] = i + n;
+		xxbuffer[i] = i + n;
 }
 
 void write_big_sparse_file(int h)
 {
 	int i;
-	off64_t offset = 0;
-	off64_t pos;
-	int n = sizeof(buffer);
+	loff_t offset = 0;
+	loff_t pos;
+	int n = sizeof(xxbuffer);
 	int wrote;
-	
-	for(i = 0; i < 4000; i++) {
+
+	for(i = 0; i < N_WRITES; i++) {
+		printf("writing at %lld\n", offset);
 		set_buffer(i);
 		pos = lseek64(h, offset, SEEK_SET);
 		if(pos != offset) {
 			printf("mismatched seek pos %lld offset %lld\n",
 				pos, offset);
+			perror("lseek64");
 			exit(1);
 		}
-		wrote = write(h, buffer, n);
-		
+		wrote = write(h, xxbuffer, n);
+
 		if(wrote != n) {
 			printf("mismatched write wrote %d n %d\n", wrote, n);
 			exit(1);
 		}
-		
-		offset += (STRIDE * sizeof(buffer));
-	}
-}
-
 
+		offset += (STRIDE * sizeof(xxbuffer));
+	}
 
+	ftruncate(h, offset);
 
-void verify_big_sparse_file(int h)
-{
 }
 
+
 int main(int argc, char *argv[])
 {
+	int handle;
 
 	if(argc < 2) {
 		printf("Gimme a file name!\n");
 		exit(1);
 	}
-	
+
 	handle = open(argv[1], O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
-	
+
 	if(handle < 0) {
 		perror("opening file");
 		exit(1);
 	}
-	
+
 	write_big_sparse_file(handle);
-	system("sudo echo 3 > /proc/sys/vm/drop_caches");
-	verify_big_sparse_file(handle);
-	
+
 	printf("Job done\n");
 	return 0;
 }