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#include "kernel/fcntl.h"
#include "kernel/param.h"
#include "kernel/types.h"
#include "kernel/stat.h"
#include "kernel/riscv.h"
#include "kernel/fs.h"
#include "user/user.h"
void test0();
void test1();
#define SZ 4096
char buf[SZ];
int
main(int argc, char *argv[])
{
test0();
test1();
exit(0);
}
void
createfile(char *file, int nblock)
{
int fd;
char buf[BSIZE];
int i;
fd = open(file, O_CREATE | O_RDWR);
if(fd < 0){
printf("createfile %s failed\n", file);
exit(-1);
}
for(i = 0; i < nblock; i++) {
if(write(fd, buf, sizeof(buf)) != sizeof(buf)) {
printf("write %s failed\n", file);
exit(-1);
}
}
close(fd);
}
void
readfile(char *file, int nbytes, int inc)
{
char buf[BSIZE];
int fd;
int i;
if(inc > BSIZE) {
printf("readfile: inc too large\n");
exit(-1);
}
if ((fd = open(file, O_RDONLY)) < 0) {
printf("readfile open %s failed\n", file);
exit(-1);
}
for (i = 0; i < nbytes; i += inc) {
if(read(fd, buf, inc) != inc) {
printf("read %s failed for block %d (%d)\n", file, i, nbytes);
exit(-1);
}
}
close(fd);
}
int ntas(int print)
{
int n;
char *c;
if (statistics(buf, SZ) <= 0) {
fprintf(2, "ntas: no stats\n");
}
c = strchr(buf, '=');
n = atoi(c+2);
if(print)
printf("%s", buf);
return n;
}
// Test reading small files concurrently
void
test0()
{
char file[2];
char dir[2];
enum { N = 10, NCHILD = 3 };
int m, n;
dir[0] = '0';
dir[1] = '\0';
file[0] = 'F';
file[1] = '\0';
printf("start test0\n");
for(int i = 0; i < NCHILD; i++){
dir[0] = '0' + i;
mkdir(dir);
if (chdir(dir) < 0) {
printf("chdir failed\n");
exit(1);
}
unlink(file);
createfile(file, N);
if (chdir("..") < 0) {
printf("chdir failed\n");
exit(1);
}
}
m = ntas(0);
for(int i = 0; i < NCHILD; i++){
dir[0] = '0' + i;
int pid = fork();
if(pid < 0){
printf("fork failed");
exit(-1);
}
if(pid == 0){
if (chdir(dir) < 0) {
printf("chdir failed\n");
exit(1);
}
readfile(file, N*BSIZE, 1);
exit(0);
}
}
for(int i = 0; i < NCHILD; i++){
wait(0);
}
printf("test0 results:\n");
n = ntas(1);
if (n-m < 500)
printf("test0: OK\n");
else
printf("test0: FAIL\n");
}
// Test bcache evictions by reading a large file concurrently
void test1()
{
char file[3];
enum { N = 200, BIG=100, NCHILD=2 };
printf("start test1\n");
file[0] = 'B';
file[2] = '\0';
for(int i = 0; i < NCHILD; i++){
file[1] = '0' + i;
unlink(file);
if (i == 0) {
createfile(file, BIG);
} else {
createfile(file, 1);
}
}
for(int i = 0; i < NCHILD; i++){
file[1] = '0' + i;
int pid = fork();
if(pid < 0){
printf("fork failed");
exit(-1);
}
if(pid == 0){
if (i==0) {
for (i = 0; i < N; i++) {
readfile(file, BIG*BSIZE, BSIZE);
}
unlink(file);
exit(0);
} else {
for (i = 0; i < N*20; i++) {
readfile(file, 1, BSIZE);
}
unlink(file);
}
exit(0);
}
}
for(int i = 0; i < NCHILD; i++){
wait(0);
}
printf("test1 OK\n");
}
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