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57 lines
1.1 KiB
57 lines
1.1 KiB
4 months ago
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// Copyright 2013 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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package main
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/*
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#include <sys/mman.h>
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#include <pthread.h>
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#include <unistd.h>
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void ctor(void) __attribute__((constructor));
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static void* thread(void*);
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void
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ctor(void)
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{
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// occupy memory where Go runtime would normally map heap
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mmap((void*)0x00c000000000, 64<<10, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, -1, 0);
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// allocate 4K every 10us
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pthread_t t;
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pthread_create(&t, 0, thread, 0);
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}
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static void*
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thread(void *p)
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{
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for(;;) {
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usleep(10000);
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mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
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}
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return 0;
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}
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*/
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import "C"
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import (
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"fmt"
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"os"
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"path/filepath"
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"time"
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)
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func main() {
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start := time.Now()
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// ensure that we can function normally
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var v [][]byte
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for i := 0; i < 1000; i++ {
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time.Sleep(10 * time.Microsecond)
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v = append(v, make([]byte, 64<<10))
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}
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fmt.Printf("ok\t%s\t%s\n", filepath.Base(os.Args[0]), time.Since(start).Round(time.Millisecond))
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}
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