fixed offset being way off

src/main.rs

@@ -33,25 +33,26 @@ fn large_random_file_generation(path: String) {
 
 fn _large_random_file_generation_helper(i: &u64, out: Arc<Mutex<Result<File, Error>>>) {
     let mut rng = XorShiftRng::seed_from_u64(2484345508);
-    let block_size = 1310720;
     // NOTE: update this both here and in `large_random_file_generation()`
     let num_threads = 12;
     let mut data = [0u8; 1310720];
+    let block_size = 1310720;
 
     // enter desired size in bytes, must be a multiple of 655360
     // this is not a typo, the extra zero after 65536is for the threads
     // 26843545600 = 25 GiB
     let blocks_per_thread: u64 = 26843545600 / (block_size * num_threads);
+    println!("{}", i);
     for u in (i * blocks_per_thread)..((i + 1) * blocks_per_thread) {
         rng.fill_bytes(&mut data);
 
-        let offset: u64 = (i * blocks_per_thread * 1310720) + (1310720 * u);
+        //let offset: u64 = (i * blocks_per_thread * 1310720) + (1310720 * u);
+        let offset: u64 = u * block_size;
         let mut out = out.lock().unwrap();
         out.as_mut().unwrap().write_all_at(&data, offset);
     }
 }
 
-
 fn single_threaded_large_random_file_generation(path: String) {
     let mut out = File::create(path).unwrap();
     let mut rng = XorShiftRng::seed_from_u64(2484345508);
@@ -62,7 +63,6 @@ fn single_threaded_large_random_file_generation(path: String) {
     }
 }
 
-
 fn small_random_files_generation(folder: String) {
     let mut rng = XorShiftRng::seed_from_u64(2484345508);
     let mut data = [0u8; 1024];
@@ -88,13 +88,16 @@ fn grab_kernel(folder: String) {
     }
 
     // i'm too lazy to do this in rust
-    println!("{:?}", Command::new("tar")
+    println!(
+        "{:?}",
+        Command::new("tar")
             .arg("-xvf")
             .arg("data/kernel/kernel.tar.xz")
             .arg("--one-top-level")
             .current_dir("data/kernel/")
             .output()
-        .unwrap());
+            .unwrap()
+    );
 }
 
 fn main() {