89 lines
3.0 KiB
Rust
89 lines
3.0 KiB
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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/// darwin_fd_limit exists to work around an issue where launchctl on Mac OS X
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/// defaults the rlimit maxfiles to 256/unlimited. The default soft limit of 256
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/// ends up being far too low for our multithreaded scheduler testing, depending
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/// on the number of cores available.
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///
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#[cfg(any(target_os = "macos", target_os = "ios"))]
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#[allow(non_camel_case_types)]
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pub fn raise_fd_limit() {
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use libc;
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use std::cmp;
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use std::io;
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use std::mem::size_of_val;
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use std::ptr::null_mut;
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unsafe {
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static CTL_KERN: libc::c_int = 1;
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static KERN_MAXFILESPERPROC: libc::c_int = 29;
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// The strategy here is to fetch the current resource limits, read the
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// kern.maxfilesperproc sysctl value, and bump the soft resource limit for
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// maxfiles up to the sysctl value.
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// Fetch the kern.maxfilesperproc value
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let mut mib: [libc::c_int; 2] = [CTL_KERN, KERN_MAXFILESPERPROC];
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let mut maxfiles: libc::c_int = 0;
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let mut size: libc::size_t = size_of_val(&maxfiles) as libc::size_t;
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if libc::sysctl(&mut mib[0], 2, &mut maxfiles as *mut _ as *mut _, &mut size,
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null_mut(), 0) != 0 {
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let err = io::Error::last_os_error();
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panic!("raise_fd_limit: error calling sysctl: {}", err);
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}
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// Fetch the current resource limits
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let mut rlim = libc::rlimit{rlim_cur: 0, rlim_max: 0};
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if libc::getrlimit(libc::RLIMIT_NOFILE, &mut rlim) != 0 {
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let err = io::Error::last_os_error();
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panic!("raise_fd_limit: error calling getrlimit: {}", err);
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}
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// Bump the soft limit to the smaller of kern.maxfilesperproc and the hard
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// limit
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rlim.rlim_cur = cmp::min(maxfiles as libc::rlim_t, rlim.rlim_max);
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// Set our newly-increased resource limit
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if libc::setrlimit(libc::RLIMIT_NOFILE, &rlim) != 0 {
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let err = io::Error::last_os_error();
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panic!("raise_fd_limit: error calling setrlimit: {}", err);
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}
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}
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}
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#[cfg(any(target_os = "linux"))]
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#[allow(non_camel_case_types)]
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pub fn raise_fd_limit() {
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use libc;
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use std::io;
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unsafe {
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// Fetch the current resource limits
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let mut rlim = libc::rlimit{rlim_cur: 0, rlim_max: 0};
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if libc::getrlimit(libc::RLIMIT_NOFILE, &mut rlim) != 0 {
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let err = io::Error::last_os_error();
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panic!("raise_fd_limit: error calling getrlimit: {}", err);
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}
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// Set soft limit to hard imit
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rlim.rlim_cur = rlim.rlim_max;
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// Set our newly-increased resource limit
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if libc::setrlimit(libc::RLIMIT_NOFILE, &rlim) != 0 {
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let err = io::Error::last_os_error();
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panic!("raise_fd_limit: error calling setrlimit: {}", err);
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}
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}
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}
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#[cfg(not(any(target_os = "macos", target_os = "ios", target_os = "linux")))]
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pub fn raise_fd_limit() {}
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