Add Measure abstraction over measuring time intervals (#4851)

Allows one to swap in different implementations. This provides
the normal Insant::now() -> .elapsed() path.
This commit is contained in:
sakridge
2019-06-29 15:34:49 +02:00
committed by GitHub
parent 41bda18046
commit a89589a1d5
12 changed files with 158 additions and 61 deletions

1
measure/.gitignore vendored Normal file
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/target/

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measure/Cargo.toml Normal file
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[package]
name = "solana-measure"
description = "Blockchain, Rebuilt for Scale"
version = "0.17.0"
documentation = "https://docs.rs/solana"
homepage = "https://solana.com/"
readme = "../README.md"
repository = "https://github.com/solana-labs/solana"
authors = ["Solana Maintainers <maintainers@solana.com>"]
license = "Apache-2.0"
edition = "2018"
[dependencies]
solana-sdk = { path = "../sdk", version = "0.17.0" }

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measure/src/lib.rs Normal file
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pub mod measure;

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measure/src/measure.rs Normal file
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use solana_sdk::timing::duration_as_ns;
use std::time::Instant;
pub struct Measure {
start: Instant,
duration: u64,
}
impl Measure {
pub fn start(_name: &'static str) -> Self {
Self {
start: Instant::now(),
duration: 0,
}
}
pub fn stop(&mut self) {
self.duration = duration_as_ns(&self.start.elapsed());
}
pub fn as_us(&self) -> u64 {
self.duration / 1000
}
pub fn as_ms(&self) -> u64 {
self.duration / (1000 * 1000)
}
pub fn as_s(&self) -> f32 {
self.duration as f32 / (1000.0f32 * 1000.0f32 * 1000.0f32)
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::thread::sleep;
use std::time::Duration;
#[test]
fn test_measure() {
let mut measure = Measure::start("test");
sleep(Duration::from_secs(1));
measure.stop();
assert!(measure.as_s() >= 0.99f32 && measure.as_s() <= 1.01f32);
assert!(measure.as_ms() >= 990 && measure.as_ms() <= 1_010);
assert!(measure.as_us() >= 999_000 && measure.as_us() <= 1_010_000);
}
}