From 69d4e3148810e07c1ffe73ef3432e032ae4771ed Mon Sep 17 00:00:00 2001
From: Brian Anderson <banderson@mozilla.com>
Date: Wed, 17 Jul 2013 10:42:16 -0700
Subject: [PATCH] std::rt: Don't overcommit rt test threads. #7772

Uses more fds than are available by default on OS X.
---
 src/libstd/rt/test.rs | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/libstd/rt/test.rs b/src/libstd/rt/test.rs
index f4b9269e8cd48..0338b1b215f30 100644
--- a/src/libstd/rt/test.rs
+++ b/src/libstd/rt/test.rs
@@ -72,10 +72,7 @@ pub fn run_in_mt_newsched_task(f: ~fn()) {
         let nthreads = match os::getenv("RUST_TEST_THREADS") {
             Some(nstr) => FromStr::from_str(nstr).get(),
             None => {
-                // Using more threads than cores in test code
-                // to force the OS to preempt them frequently.
-                // Assuming that this help stress test concurrent types.
-                util::num_cpus() * 2
+                util::num_cpus()
             }
         };