askiiart/disk-read-benchmark
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make the number of threads adjustable

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This commit is contained in:
askiiart 2024-10-25 14:24:45 -05:00
parent 6da961fc84
commit 1573de227c
Signed by untrusted user who does not match committer: askiiart
GPG key ID: EA85979611654C30
1 changed files with 8 additions and 5 deletions
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13
src/main.rs
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@ -13,7 +13,8 @@ use std::{
fn large_random_file_generation(path: String) {
// https://stackoverflow.com/a/65235966
let mut out = Arc::new(Mutex::new(File::create(path)));
let num_threads: u64 = 10;
// NOTE: update this both here and in the helper (_large_random_file_generation_helper())
let num_threads: u64 = 12;
let mut threads: Vec<JoinHandle<()>> = Vec::new();
for i in 0..num_threads {
let out = Arc::clone(&out);
@ -32,15 +33,17 @@ 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];
// 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 / 13107200;
let blocks_per_thread: u64 = 26843545600 / (block_size * num_threads);
for u in (i * blocks_per_thread)..((i + 1) * blocks_per_thread) {
rng.fill_bytes(&mut data);
println!("{} {}", i, u);
let offset: u64 = (i * blocks_per_thread * 1310720) + (1310720 * u);
let mut out = out.lock().unwrap();
@ -62,7 +65,7 @@ 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; 1000];
let mut data = [0u8; 1024];
for i in 1..1001 {
let mut out = File::create(format!("{folder}/{i}")).unwrap();
rng.fill_bytes(&mut data);
@ -95,7 +98,7 @@ fn grab_kernel(folder: String) {
}
fn main() {
large_random_file_generation("data/output".to_string());
large_random_file_generation("data/25G-random.bin".to_string());
//single_threaded_large_random_file_generation("data/output".to_string())
//small_random_files_generation("data/small-files/random".to_string());