73 lines
1.6 KiB
Go
73 lines
1.6 KiB
Go
// Copyright 2009 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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// Repeated malloc test.
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// +build ignore
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package main
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import (
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"flag"
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"runtime"
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)
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var chatty = flag.Bool("v", false, "chatty")
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var oldsys uint64
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var memstats runtime.MemStats
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func bigger() {
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st := &memstats
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runtime.ReadMemStats(st)
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if oldsys < st.Sys {
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oldsys = st.Sys
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if *chatty {
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println(st.Sys, " system bytes for ", st.Alloc, " Go bytes")
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}
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if st.Sys > 1e9 {
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println("too big")
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panic("fail")
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}
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}
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}
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func main() {
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runtime.GC() // clean up garbage from init
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runtime.ReadMemStats(&memstats) // first call can do some allocations
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runtime.MemProfileRate = 0 // disable profiler
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stacks := memstats.Alloc // ignore stacks
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flag.Parse()
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for i := 0; i < 1<<7; i++ {
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for j := 1; j <= 1<<22; j <<= 1 {
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if i == 0 && *chatty {
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println("First alloc:", j)
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}
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if a := memstats.Alloc - stacks; a != 0 {
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println("no allocations but stats report", a, "bytes allocated")
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panic("fail")
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}
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b := runtime.Alloc(uintptr(j))
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runtime.ReadMemStats(&memstats)
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during := memstats.Alloc - stacks
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runtime.Free(b)
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runtime.ReadMemStats(&memstats)
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if a := memstats.Alloc - stacks; a != 0 {
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println("allocated ", j, ": wrong stats: during=", during, " after=", a, " (want 0)")
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panic("fail")
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}
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bigger()
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}
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if i%(1<<10) == 0 && *chatty {
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println(i)
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}
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if i == 0 {
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if *chatty {
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println("Primed", i)
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}
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// runtime.frozen = true
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}
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}
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}
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