WIP Changes to tests

[yaffs2.git] / linux-tests / writebigsparse.c

diff --git a/linux-tests/writebigsparse.c b/linux-tests/writebigsparse.c
index fab2d168727dd98a6ec0cdf789be019a5ee36205..aeb2535551b379ee96dd5e0dcf4a5c3892bcbc44 100644 (file)
--- a/linux-tests/writebigsparse.c
+++ b/linux-tests/writebigsparse.c
@@ -6,31 +6,31 @@
 #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) {
@@ -39,43 +39,39 @@ void write_big_sparse_file(int h)
                        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;
 }