runtime: shorten tests in all.bash

This cuts 23 seconds from all.bash on my MacBook Pro.

Change-Id: Ibc4d7c01660b9e9ebd088dd55ba993f0d7ec6aa3
Reviewed-on: https://go-review.googlesource.com/73991
Reviewed-by: Ian Lance Taylor <iant@golang.org>

2 files changed, 10 insertions, 2 deletions

diff --git a/src/runtime/testdata/testprogcgo/callback.go b/src/runtime/testdata/testprogcgo/callback.go
index 7d9d68ddd1..be0409f39d 100644
--- a/src/runtime/testdata/testprogcgo/callback.go
+++ b/src/runtime/testdata/testprogcgo/callback.go
@@ -29,6 +29,7 @@ import "C"
 
 import (
 	"fmt"
+	"os"
 	"runtime"
 )
 
@@ -63,7 +64,10 @@ func grow1(x, sum *int) int {
 }
 
 func CgoCallbackGC() {
-	const P = 100
+	P := 100
+	if os.Getenv("RUNTIME_TESTING_SHORT") != "" {
+		P = 10
+	}
 	done := make(chan bool)
 	// allocate a bunch of stack frames and spray them with pointers
 	for i := 0; i < P; i++ {
diff --git a/src/runtime/testdata/testprogcgo/cgo.go b/src/runtime/testdata/testprogcgo/cgo.go
index 209524a24d..a587db385b 100644
--- a/src/runtime/testdata/testprogcgo/cgo.go
+++ b/src/runtime/testdata/testprogcgo/cgo.go
@@ -52,7 +52,11 @@ func CgoSignalDeadlock() {
 	time.Sleep(time.Millisecond)
 	start := time.Now()
 	var times []time.Duration
-	for i := 0; i < 64; i++ {
+	n := 64
+	if os.Getenv("RUNTIME_TEST_SHORT") != "" {
+		n = 16
+	}
+	for i := 0; i < n; i++ {
 		go func() {
 			runtime.LockOSThread()
 			select {}