+++ /dev/null
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build ignore
-
-// trivial malloc test
-
-package main
-
-import (
- "flag"
- "fmt"
- "runtime"
-)
-
-var chatty = flag.Bool("v", false, "chatty")
-
-func main() {
- memstats := new(runtime.MemStats)
- runtime.Free(runtime.Alloc(1))
- runtime.ReadMemStats(memstats)
- if *chatty {
- fmt.Printf("%+v %v\n", memstats, uint64(0))
- }
-}
+++ /dev/null
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build ignore
-
-// Random malloc test.
-
-package main
-
-import (
- "flag"
- "math/rand"
- "runtime"
- "unsafe"
-)
-
-var chatty = flag.Bool("v", false, "chatty")
-
-var footprint uint64
-var allocated uint64
-
-func bigger() {
- memstats := new(runtime.MemStats)
- runtime.ReadMemStats(memstats)
- if f := memstats.Sys; footprint < f {
- footprint = f
- if *chatty {
- println("Footprint", footprint, " for ", allocated)
- }
- if footprint > 1e9 {
- println("too big")
- panic("fail")
- }
- }
-}
-
-// Prime the data structures by allocating one of
-// each block in order. After this, there should be
-// little reason to ask for more memory from the OS.
-func prime() {
- for i := 0; i < 16; i++ {
- b := runtime.Alloc(1 << uint(i))
- runtime.Free(b)
- }
- for i := uintptr(0); i < 256; i++ {
- b := runtime.Alloc(i << 12)
- runtime.Free(b)
- }
-}
-
-func memset(b *byte, c byte, n uintptr) {
- np := uintptr(n)
- for i := uintptr(0); i < np; i++ {
- *(*byte)(unsafe.Pointer(uintptr(unsafe.Pointer(b)) + i)) = c
- }
-}
-
-func main() {
- flag.Parse()
- // prime()
- var blocks [1]struct {
- base *byte
- siz uintptr
- }
- for i := 0; i < 1<<10; i++ {
- if i%(1<<10) == 0 && *chatty {
- println(i)
- }
- b := rand.Int() % len(blocks)
- if blocks[b].base != nil {
- // println("Free", blocks[b].siz, blocks[b].base)
- runtime.Free(blocks[b].base)
- blocks[b].base = nil
- allocated -= uint64(blocks[b].siz)
- continue
- }
- siz := uintptr(rand.Int() >> (11 + rand.Uint32()%20))
- base := runtime.Alloc(siz)
- // ptr := uintptr(syscall.BytePtr(base))+uintptr(siz/2)
- // obj, size, ref, ok := allocator.find(ptr)
- // if obj != base || *ref != 0 || !ok {
- // println("find", siz, obj, ref, ok)
- // panic("fail")
- // }
- blocks[b].base = base
- blocks[b].siz = siz
- allocated += uint64(siz)
- // println("Alloc", siz, base)
- memset(base, 0xbb, siz)
- bigger()
- }
-}
+++ /dev/null
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Repeated malloc test.
-
-// +build ignore
-
-package main
-
-import (
- "flag"
- "runtime"
-)
-
-var chatty = flag.Bool("v", false, "chatty")
-
-var oldsys uint64
-var memstats runtime.MemStats
-
-func bigger() {
- st := &memstats
- runtime.ReadMemStats(st)
- if oldsys < st.Sys {
- oldsys = st.Sys
- if *chatty {
- println(st.Sys, " system bytes for ", st.Alloc, " Go bytes")
- }
- if st.Sys > 1e9 {
- println("too big")
- panic("fail")
- }
- }
-}
-
-func main() {
- runtime.GC() // clean up garbage from init
- runtime.ReadMemStats(&memstats) // first call can do some allocations
- runtime.MemProfileRate = 0 // disable profiler
- stacks := memstats.Alloc // ignore stacks
- flag.Parse()
- for i := 0; i < 1<<7; i++ {
- for j := 1; j <= 1<<22; j <<= 1 {
- if i == 0 && *chatty {
- println("First alloc:", j)
- }
- if a := memstats.Alloc - stacks; a != 0 {
- println("no allocations but stats report", a, "bytes allocated")
- panic("fail")
- }
- b := runtime.Alloc(uintptr(j))
- runtime.ReadMemStats(&memstats)
- during := memstats.Alloc - stacks
- runtime.Free(b)
- runtime.ReadMemStats(&memstats)
- if a := memstats.Alloc - stacks; a != 0 {
- println("allocated ", j, ": wrong stats: during=", during, " after=", a, " (want 0)")
- panic("fail")
- }
- bigger()
- }
- if i%(1<<10) == 0 && *chatty {
- println(i)
- }
- if i == 0 {
- if *chatty {
- println("Primed", i)
- }
- // runtime.frozen = true
- }
- }
-}
+++ /dev/null
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build ignore
-
-// Repeated malloc test.
-
-package main
-
-import (
- "flag"
- "fmt"
- "runtime"
- "strconv"
-)
-
-var chatty = flag.Bool("v", false, "chatty")
-var reverse = flag.Bool("r", false, "reverse")
-var longtest = flag.Bool("l", false, "long test")
-
-var b []*byte
-var stats = new(runtime.MemStats)
-
-func OkAmount(size, n uintptr) bool {
- if n < size {
- return false
- }
- if size < 16*8 {
- if n > size+16 {
- return false
- }
- } else {
- if n > size*9/8 {
- return false
- }
- }
- return true
-}
-
-func AllocAndFree(size, count int) {
- defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(1))
- if *chatty {
- fmt.Printf("size=%d count=%d ...\n", size, count)
- }
- runtime.ReadMemStats(stats)
- n1 := stats.Alloc
- for i := 0; i < count; i++ {
- b[i] = runtime.Alloc(uintptr(size))
- base, n := runtime.Lookup(b[i])
- if base != b[i] || !OkAmount(uintptr(size), n) {
- println("lookup failed: got", base, n, "for", b[i])
- panic("fail")
- }
- runtime.ReadMemStats(stats)
- if stats.Sys > 1e9 {
- println("too much memory allocated")
- panic("fail")
- }
- }
- runtime.ReadMemStats(stats)
- n2 := stats.Alloc
- if *chatty {
- fmt.Printf("size=%d count=%d stats=%+v\n", size, count, *stats)
- }
- n3 := stats.Alloc
- for j := 0; j < count; j++ {
- i := j
- if *reverse {
- i = count - 1 - j
- }
- alloc := uintptr(stats.Alloc)
- base, n := runtime.Lookup(b[i])
- if base != b[i] || !OkAmount(uintptr(size), n) {
- println("lookup failed: got", base, n, "for", b[i])
- panic("fail")
- }
- runtime.Free(b[i])
- runtime.ReadMemStats(stats)
- if stats.Alloc != uint64(alloc-n) {
- println("free alloc got", stats.Alloc, "expected", alloc-n, "after free of", n)
- panic("fail")
- }
- if stats.Sys > 1e9 {
- println("too much memory allocated")
- panic("fail")
- }
- }
- runtime.ReadMemStats(stats)
- n4 := stats.Alloc
-
- if *chatty {
- fmt.Printf("size=%d count=%d stats=%+v\n", size, count, *stats)
- }
- if n2-n1 != n3-n4 {
- println("wrong alloc count: ", n2-n1, n3-n4)
- panic("fail")
- }
-}
-
-func atoi(s string) int {
- i, _ := strconv.Atoi(s)
- return i
-}
-
-func main() {
- runtime.MemProfileRate = 0 // disable profiler
- flag.Parse()
- b = make([]*byte, 10000)
- if flag.NArg() > 0 {
- AllocAndFree(atoi(flag.Arg(0)), atoi(flag.Arg(1)))
- return
- }
- maxb := 1 << 22
- if !*longtest {
- maxb = 1 << 19
- }
- for j := 1; j <= maxb; j <<= 1 {
- n := len(b)
- max := uintptr(1 << 28)
- if !*longtest {
- max = uintptr(maxb)
- }
- if uintptr(j)*uintptr(n) > max {
- n = int(max / uintptr(j))
- }
- if n < 10 {
- n = 10
- }
- for m := 1; m <= n; {
- AllocAndFree(j, m)
- if m == n {
- break
- }
- m = 5 * m / 4
- if m < 4 {
- m++
- }
- if m > n {
- m = n
- }
- }
- }
-}