From: Russ Cox <rsc@golang.org>
Date: Sat, 5 Dec 2015 04:16:50 +0000 (-0500)
Subject: runtime: document that NumCPU does not change
X-Git-Tag: go1.6beta1~173
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=c5a94ba24fd0392bab2c5b2404a820dbf6bc7346;p=gostls13.git

runtime: document that NumCPU does not change

Fixes #11609.

Change-Id: I3cf64164fde28ebf739706728b84d8ef5b6dc90e
Reviewed-on: https://go-review.googlesource.com/17456
Reviewed-by: Ian Lance Taylor <iant@golang.org>
---

diff --git a/src/runtime/debug.go b/src/runtime/debug.go
index ac61173b7f..0f5936566e 100644
--- a/src/runtime/debug.go
+++ b/src/runtime/debug.go
@@ -35,6 +35,10 @@ func GOMAXPROCS(n int) int {
 }
 
 // NumCPU returns the number of logical CPUs usable by the current process.
+//
+// The set of available CPUs is checked by querying the operating system
+// at process startup. Changes to operating system CPU allocation after
+// process startup are not reflected.
 func NumCPU() int {
 	return int(ncpu)
 }