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gremlin.go
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gremlin.go
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// Copyright 2014-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License"). You may
// not use this file except in compliance with the License. A copy of the
// License is located at
//
// http://aws.amazon.com/apache2.0/
//
// or in the "license" file accompanying this file. This file is distributed
// on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
// express or implied. See the License for the specific language governing
// permissions and limitations under the License.
package main
import (
"math"
"math/rand"
"time"
)
const defaultRunDuration = 60 * time.Second
type loiterFunc func()
func noop() {
}
func allocateMemory() {
// Assign memory to a slice.
arr := make([]float64, math.MaxUint16)
for i := 0; i < math.MaxUint8; i++ {
arr[i] = rand.Float64()
}
}
func wieldScissor() {
// Combined workload.
timeoutAndMoveOn(noop, 1*time.Millisecond)
timeoutAndMoveOn(allocateMemory, 10*time.Millisecond)
time.Sleep(5 * time.Millisecond)
}
// timeoutAndMoveOn executes the long running function pointed to by 'fp' and
// times out after 'timeout' duration.
func timeoutAndMoveOn(fp loiterFunc, timeout time.Duration) {
ch := time.After(timeout)
for {
select {
case <-ch:
return
default:
fp()
}
}
}
func main() {
timeoutAndMoveOn(wieldScissor, defaultRunDuration)
}