measure sleep delay in loop

2017-04-02 11:04:51 +02:00
parent 2289644aec
commit d63bd4f35b
3 changed files with 130 additions and 0 deletions
--- a/V2/sleep/Cargo.lock
+++ b/V2/sleep/Cargo.lock
@@ -0,0 +1,61 @@
+[root]
+name = "sleep"
+version = "0.1.0"
+dependencies = [
+ "shuteye 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
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+dependencies = [
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+ "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "redox_syscall"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "shuteye"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "time"
+version = "0.1.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
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+]
+
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+
+[[package]]
+name = "winapi-build"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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--- a/V2/sleep/Cargo.toml
+++ b/V2/sleep/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "sleep"
+version = "0.1.0"
+authors = ["Simon Wörner <git@simon-woerner.de>"]
+
+[dependencies]
+# libc = ">=0.2.21"
+shuteye = ">=0.2.0"
+time = ">=0.1.36"
--- a/V2/sleep/src/main.rs
+++ b/V2/sleep/src/main.rs
@@ -0,0 +1,60 @@
+extern crate shuteye;
+extern crate time;
+
+use std::time::Duration;
+use shuteye::sleep;
+use time::precise_time_ns;
+
+fn measure_duration(sleep_duration: Duration) -> Duration {
+    let start = precise_time_ns();
+    sleep(sleep_duration);
+    let end = precise_time_ns();
+
+    let duration = end - start;
+    Duration::new(duration / 1_000_000_000, (duration % 1_000_000_000) as u32)
+}
+
+fn measure_delay(sleep_duration: Duration) -> (Duration, Duration) {
+    let duration = measure_duration(sleep_duration);
+    (duration, duration - sleep_duration)
+}
+
+fn measure_delay_loop(sleep_duration: Duration, count: u64) -> Vec<(Duration, Duration)> {
+    println!("Starting measurment with period {}s {}ns for {} loops",
+             sleep_duration.as_secs(),
+             sleep_duration.subsec_nanos(),
+             count);
+    let mut data: Vec<(Duration, Duration)> = Vec::with_capacity(count as usize);
+
+    for _ in 0..count {
+        let (duration, delay) = measure_delay(sleep_duration);
+        data.push((duration, delay));
+        println!("value: {} s {} ns\tdelay: {} s {} ns\trelativ delay = {:.2}%\traw_data: {:?}",
+                 duration.as_secs(),
+                 duration.subsec_nanos(),
+                 delay.as_secs(),
+                 delay.subsec_nanos(),
+                 (delay.subsec_nanos() * 100) as f64 / duration.subsec_nanos() as f64,
+                 delay);
+    }
+
+    data
+}
+
+fn main() {
+    println!("Hello, world!");
+
+    let data = measure_delay_loop(Duration::new(0, 10_000_000), 100);
+    println!("{:?}", data);
+
+    /*let sleep_time = 5000;
+    println!("sleep_time = {}", sleep_time);
+
+    let start = precise_time_ns();
+    sleep(Duration::from_millis(5000));
+    let end = precise_time_ns();
+    let diff = end-start;
+
+    println!("start = {}ms\nend = {}\ndiff = {}", start, end, diff);
+    println!("diff - sleep_time = {}", diff - sleep_time * 1000 * 1000);*/
+}