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db7fd1c142
run GC in its own background goroutine making the caller runnable if resources are available. This is critical in single goroutine applications. Allow goroutines that allocate a lot to help out the GC and in doing so throttle their own allocation. Adjust test so that it only detects that a GC is run during init calls and not whether the GC is memory efficient. Memory efficiency work will happen later in 1.5. Change-Id: I4306f5e377bb47c69bda1aedba66164f12b20c2b Reviewed-on: https://go-review.googlesource.com/2349 Reviewed-by: Russ Cox <rsc@golang.org> Reviewed-by: Austin Clements <austin@google.com>
46 lines
816 B
Go
46 lines
816 B
Go
// run
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test that goroutines and garbage collection run during init.
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package main
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import "runtime"
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var x []byte
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func init() {
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c := make(chan int)
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go send(c)
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<-c
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const chunk = 1 << 20
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memstats := new(runtime.MemStats)
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runtime.ReadMemStats(memstats)
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sys := memstats.Sys
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b := make([]byte, chunk)
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for i := range b {
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b[i] = byte(i%10 + '0')
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}
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s := string(b)
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for i := 0; i < 1000; i++ {
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x = []byte(s)
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}
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runtime.ReadMemStats(memstats)
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sys1 := memstats.Sys
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if sys1-sys > chunk*500 {
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println("allocated 1000 chunks of", chunk, "and used ", sys1-sys, "memory")
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panic("init1")
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}
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}
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func send(c chan int) {
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c <- 1
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}
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func main() {
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}
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