From 130458470a11d1f16908d7db7fe683b621541a36 Mon Sep 17 00:00:00 2001
From: Dmitriy Vyukov <dvyukov@google.com>
Date: Thu, 6 Mar 2014 13:16:14 +0400
Subject: [PATCH] run.bash: explain why we set GOMAXPROCS for runtime test
 Fixes #7459.

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/71060044
---
 src/run.bash |  2 ++
 src/run.bat  | 10 +++++++++-
 src/run.rc   |  2 ++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/run.bash b/src/run.bash
index a3eecff0f0..8e8715cab0 100755
--- a/src/run.bash
+++ b/src/run.bash
@@ -54,6 +54,8 @@ echo '# Testing packages.'
 time go test std -short -timeout=$(expr 120 \* $timeout_scale)s
 echo
 
+# We set GOMAXPROCS=2 in addition to -cpu=1,2,4 in order to test runtime bootstrap code,
+# creation of first goroutines and first garbage collections in the parallel setting.
 echo '# GOMAXPROCS=2 runtime -cpu=1,2,4'
 GOMAXPROCS=2 go test runtime -short -timeout=$(expr 300 \* $timeout_scale)s -cpu=1,2,4
 echo
diff --git a/src/run.bat b/src/run.bat
index f01032699e..fdaacfff44 100644
--- a/src/run.bat
+++ b/src/run.bat
@@ -42,11 +42,19 @@ go test std -short -timeout=120s
 if errorlevel 1 goto fail
 echo.
 
-echo # runtime -cpu=1,2,4
+set OLDGOMAXPROCS=%GOMAXPROCS%
+
+:: We set GOMAXPROCS=2 in addition to -cpu=1,2,4 in order to test runtime bootstrap code,
+:: creation of first goroutines and first garbage collections in the parallel setting.
+echo # GOMAXPROCS=2 runtime -cpu=1,2,4
+set GOMAXPROCS=2
 go test runtime -short -timeout=300s -cpu=1,2,4
 if errorlevel 1 goto fail
 echo.
 
+set GOMAXPROCS=%OLDGOMAXPROCS%
+set OLDGOMAXPROCS=
+
 echo # sync -cpu=10
 go test sync -short -timeout=120s -cpu=10
 if errorlevel 1 goto fail
diff --git a/src/run.rc b/src/run.rc
index f9837d4fce..2613621556 100755
--- a/src/run.rc
+++ b/src/run.rc
@@ -32,6 +32,8 @@ echo '# Testing packages.'
 time go test std -short -timeout 120s
 echo
 
+# We set GOMAXPROCS=2 in addition to -cpu=1,2,4 in order to test runtime bootstrap code,
+# creation of first goroutines and first garbage collections in the parallel setting.
 echo '# GOMAXPROCS=2 runtime -cpu=1,2,4'
 GOMAXPROCS=2 go test runtime -short -timeout 240s -cpu 1,2,4
 echo
-- 
2.48.1