From 8dd16259287f58f9273002717ec4d27e97127719 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 12 Jun 2024 07:43:14 +0200 Subject: Merging upstream version 127.0. Signed-off-by: Daniel Baumann --- third_party/rust/nix/test/sys/test_resource.rs | 43 ++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 third_party/rust/nix/test/sys/test_resource.rs (limited to 'third_party/rust/nix/test/sys/test_resource.rs') diff --git a/third_party/rust/nix/test/sys/test_resource.rs b/third_party/rust/nix/test/sys/test_resource.rs new file mode 100644 index 0000000000..8b12a9495b --- /dev/null +++ b/third_party/rust/nix/test/sys/test_resource.rs @@ -0,0 +1,43 @@ +use nix::sys::resource::{getrlimit, setrlimit, Resource}; +use nix::sys::resource::{getrusage, UsageWho}; + +/// Tests the RLIMIT_NOFILE functionality of getrlimit(), where the resource RLIMIT_NOFILE refers +/// to the maximum file descriptor number that can be opened by the process (aka the maximum number +/// of file descriptors that the process can open, since Linux 4.5). +/// +/// We first fetch the existing file descriptor maximum values using getrlimit(), then edit the +/// soft limit to make sure it has a new and distinct value to the hard limit. We then setrlimit() +/// to put the new soft limit in effect, and then getrlimit() once more to ensure the limits have +/// been updated. +#[test] +pub fn test_resource_limits_nofile() { + let (mut soft_limit, hard_limit) = + getrlimit(Resource::RLIMIT_NOFILE).unwrap(); + + soft_limit -= 1; + assert_ne!(soft_limit, hard_limit); + setrlimit(Resource::RLIMIT_NOFILE, soft_limit, hard_limit).unwrap(); + + let (new_soft_limit, _) = getrlimit(Resource::RLIMIT_NOFILE).unwrap(); + assert_eq!(new_soft_limit, soft_limit); +} + +#[test] +pub fn test_self_cpu_time() { + // Make sure some CPU time is used. + let mut numbers: Vec = (1..1_000_000).collect(); + numbers.iter_mut().for_each(|item| *item *= 2); + + // FIXME: this is here to help ensure the compiler does not optimize the whole + // thing away. Replace the assert with test::black_box once stabilized. + assert_eq!(numbers[100..200].iter().sum::(), 30_100); + + let usage = getrusage(UsageWho::RUSAGE_SELF) + .expect("Failed to call getrusage for SELF"); + let rusage = usage.as_ref(); + + let user = usage.user_time(); + assert!(user.tv_sec() > 0 || user.tv_usec() > 0); + assert_eq!(user.tv_sec(), rusage.ru_utime.tv_sec); + assert_eq!(user.tv_usec(), rusage.ru_utime.tv_usec); +} -- cgit v1.2.3