1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
// Copyright 2010 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.
// Export guts for testing.
package runtime
import (
"runtime/internal/atomic"
"unsafe"
)
//var Fadd64 = fadd64
//var Fsub64 = fsub64
//var Fmul64 = fmul64
//var Fdiv64 = fdiv64
//var F64to32 = f64to32
//var F32to64 = f32to64
//var Fcmp64 = fcmp64
//var Fintto64 = fintto64
//var F64toint = f64toint
//var Sqrt = sqrt
var Entersyscall = entersyscall
var Exitsyscall = exitsyscall
var LockedOSThread = lockedOSThread
// var Xadduintptr = xadduintptr
// var FuncPC = funcPC
type LFNode struct {
Next uint64
Pushcnt uintptr
}
func LFStackPush(head *uint64, node *LFNode) {
lfstackpush(head, (*lfnode)(unsafe.Pointer(node)))
}
func LFStackPop(head *uint64) *LFNode {
return (*LFNode)(unsafe.Pointer(lfstackpop(head)))
}
func GCMask(x interface{}) (ret []byte) {
return nil
}
func RunSchedLocalQueueTest() {
_p_ := new(p)
gs := make([]g, len(_p_.runq))
for i := 0; i < len(_p_.runq); i++ {
if g, _ := runqget(_p_); g != nil {
throw("runq is not empty initially")
}
for j := 0; j < i; j++ {
runqput(_p_, &gs[i], false)
}
for j := 0; j < i; j++ {
if g, _ := runqget(_p_); g != &gs[i] {
print("bad element at iter ", i, "/", j, "\n")
throw("bad element")
}
}
if g, _ := runqget(_p_); g != nil {
throw("runq is not empty afterwards")
}
}
}
func RunSchedLocalQueueStealTest() {
p1 := new(p)
p2 := new(p)
gs := make([]g, len(p1.runq))
for i := 0; i < len(p1.runq); i++ {
for j := 0; j < i; j++ {
gs[j].sig = 0
runqput(p1, &gs[j], false)
}
gp := runqsteal(p2, p1, true)
s := 0
if gp != nil {
s++
gp.sig++
}
for {
gp, _ = runqget(p2)
if gp == nil {
break
}
s++
gp.sig++
}
for {
gp, _ = runqget(p1)
if gp == nil {
break
}
gp.sig++
}
for j := 0; j < i; j++ {
if gs[j].sig != 1 {
print("bad element ", j, "(", gs[j].sig, ") at iter ", i, "\n")
throw("bad element")
}
}
if s != i/2 && s != i/2+1 {
print("bad steal ", s, ", want ", i/2, " or ", i/2+1, ", iter ", i, "\n")
throw("bad steal")
}
}
}
func RunSchedLocalQueueEmptyTest(iters int) {
// Test that runq is not spuriously reported as empty.
// Runq emptiness affects scheduling decisions and spurious emptiness
// can lead to underutilization (both runnable Gs and idle Ps coexist
// for arbitrary long time).
done := make(chan bool, 1)
p := new(p)
gs := make([]g, 2)
ready := new(uint32)
for i := 0; i < iters; i++ {
*ready = 0
next0 := (i & 1) == 0
next1 := (i & 2) == 0
runqput(p, &gs[0], next0)
go func() {
for atomic.Xadd(ready, 1); atomic.Load(ready) != 2; {
}
if runqempty(p) {
println("next:", next0, next1)
throw("queue is empty")
}
done <- true
}()
for atomic.Xadd(ready, 1); atomic.Load(ready) != 2; {
}
runqput(p, &gs[1], next1)
runqget(p)
<-done
runqget(p)
}
}
//var StringHash = stringHash
//var BytesHash = bytesHash
//var Int32Hash = int32Hash
//var Int64Hash = int64Hash
//var EfaceHash = efaceHash
//var IfaceHash = ifaceHash
//var MemclrBytes = memclrBytes
var HashLoad = &hashLoad
// entry point for testing
//func GostringW(w []uint16) (s string) {
// s = gostringw(&w[0])
// return
//}
//var Gostringnocopy = gostringnocopy
//var Maxstring = &maxstring
//type Uintreg uintreg
var Open = open
var Close = closefd
var Read = read
var Write = write
func Envs() []string { return envs }
func SetEnvs(e []string) { envs = e }
//var BigEndian = sys.BigEndian
// For benchmarking.
/*
func BenchSetType(n int, x interface{}) {
e := *efaceOf(&x)
t := e._type
var size uintptr
var p unsafe.Pointer
switch t.kind & kindMask {
case kindPtr:
t = (*ptrtype)(unsafe.Pointer(t)).elem
size = t.size
p = e.data
case kindSlice:
slice := *(*struct {
ptr unsafe.Pointer
len, cap uintptr
})(e.data)
t = (*slicetype)(unsafe.Pointer(t)).elem
size = t.size * slice.len
p = slice.ptr
}
allocSize := roundupsize(size)
systemstack(func() {
for i := 0; i < n; i++ {
heapBitsSetType(uintptr(p), allocSize, size, t)
}
})
}
const PtrSize = sys.PtrSize
var TestingAssertE2I2GC = &testingAssertE2I2GC
var TestingAssertE2T2GC = &testingAssertE2T2GC
var ForceGCPeriod = &forcegcperiod
*/
// SetTracebackEnv is like runtime/debug.SetTraceback, but it raises
// the "environment" traceback level, so later calls to
// debug.SetTraceback (e.g., from testing timeouts) can't lower it.
func SetTracebackEnv(level string) {
setTraceback(level)
traceback_env = traceback_cache
}
/*
var ReadUnaligned32 = readUnaligned32
var ReadUnaligned64 = readUnaligned64
func CountPagesInUse() (pagesInUse, counted uintptr) {
stopTheWorld("CountPagesInUse")
pagesInUse = uintptr(mheap_.pagesInUse)
for _, s := range h_allspans {
if s.state == mSpanInUse {
counted += s.npages
}
}
startTheWorld()
return
}
*/
|
