mirror of https://github.com/rust-lang/cargo
Use `available_parallelism` instead of num_cpus
`std:🧵:available_parallelism` has been stabilized since 1.59.0.
Also, we don't want to block timing data output, so if parallelism
data is not available the table will display `ncpu=n/a` instead.
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@ -43,7 +43,6 @@ libc = "0.2"
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log = "0.4.6"
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libgit2-sys = "0.12.24"
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memchr = "2.1.3"
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num_cpus = "1.0"
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opener = "0.5"
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os_info = "3.0.7"
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percent-encoding = "2.0"
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@ -6,6 +6,7 @@ use cargo_util::ProcessBuilder;
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use serde::ser;
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use std::cell::RefCell;
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use std::path::PathBuf;
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use std::thread::available_parallelism;
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/// Configuration information for a rustc build.
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#[derive(Debug)]
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@ -70,7 +71,10 @@ impl BuildConfig {
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its environment, ignoring the `-j` parameter",
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)?;
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}
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let jobs = jobs.or(cfg.jobs).unwrap_or(::num_cpus::get() as u32);
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let jobs = match jobs.or(cfg.jobs) {
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Some(j) => j,
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None => available_parallelism()?.get() as u32,
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};
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if jobs == 0 {
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anyhow::bail!("jobs may not be 0");
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}
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@ -13,6 +13,7 @@ use anyhow::Context as _;
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use cargo_util::paths;
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use std::collections::HashMap;
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use std::io::{BufWriter, Write};
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use std::thread::available_parallelism;
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use std::time::{Duration, Instant, SystemTime};
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pub struct Timings<'cfg> {
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@ -380,6 +381,9 @@ impl<'cfg> Timings<'cfg> {
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};
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let total_time = format!("{:.1}s{}", duration, time_human);
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let max_concurrency = self.concurrency.iter().map(|c| c.active).max().unwrap();
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let num_cpus = available_parallelism()
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.map(|x| x.get().to_string())
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.unwrap_or_else(|_| "n/a".into());
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let max_rustc_concurrency = self
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.concurrency
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.iter()
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@ -442,7 +446,7 @@ impl<'cfg> Timings<'cfg> {
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self.total_fresh + self.total_dirty,
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max_concurrency,
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bcx.build_config.jobs,
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num_cpus::get(),
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num_cpus,
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self.start_str,
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total_time,
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rustc_info,
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