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minio/vendor/github.com/klauspost/cpuid/mockcpu_test.go

209 lines
5.1 KiB

package cpuid
import (
"archive/zip"
"fmt"
"io/ioutil"
"sort"
"strings"
"testing"
)
type fakecpuid map[uint32][][]uint32
type idfuncs struct {
cpuid func(op uint32) (eax, ebx, ecx, edx uint32)
cpuidex func(op, op2 uint32) (eax, ebx, ecx, edx uint32)
xgetbv func(index uint32) (eax, edx uint32)
}
func (f fakecpuid) String() string {
var out = make([]string, 0, len(f))
for key, val := range f {
for _, v := range val {
out = append(out, fmt.Sprintf("CPUID %08x: [%08x, %08x, %08x, %08x]", key, v[0], v[1], v[2], v[3]))
}
}
sorter := sort.StringSlice(out)
sort.Sort(&sorter)
return strings.Join(sorter, "\n")
}
func mockCPU(def []byte) func() {
lines := strings.Split(string(def), "\n")
anyfound := false
fakeID := make(fakecpuid)
for _, line := range lines {
line = strings.Trim(line, "\r\t ")
if !strings.HasPrefix(line, "CPUID") {
continue
}
// Only collect for first cpu
if strings.HasPrefix(line, "CPUID 00000000") {
if anyfound {
break
}
}
if !strings.Contains(line, "-") {
//continue
}
items := strings.Split(line, ":")
if len(items) < 2 {
if len(line) == 51 || len(line) == 50 {
items = []string{line[0:14], line[15:]}
} else {
items = strings.Split(line, "\t")
if len(items) != 2 {
//fmt.Println("not found:", line, "len:", len(line))
continue
}
}
}
items = items[0:2]
vals := strings.Trim(items[1], "\r\n ")
var idV uint32
n, err := fmt.Sscanf(items[0], "CPUID %x", &idV)
if err != nil || n != 1 {
continue
}
existing, ok := fakeID[idV]
if !ok {
existing = make([][]uint32, 0)
}
values := make([]uint32, 4)
n, err = fmt.Sscanf(vals, "%x-%x-%x-%x", &values[0], &values[1], &values[2], &values[3])
if n != 4 || err != nil {
n, err = fmt.Sscanf(vals, "%x %x %x %x", &values[0], &values[1], &values[2], &values[3])
if n != 4 || err != nil {
//fmt.Println("scanned", vals, "got", n, "Err:", err)
continue
}
}
existing = append(existing, values)
fakeID[idV] = existing
anyfound = true
}
restorer := func(f idfuncs) func() {
return func() {
cpuid = f.cpuid
cpuidex = f.cpuidex
xgetbv = f.xgetbv
}
}(idfuncs{cpuid: cpuid, cpuidex: cpuidex, xgetbv: xgetbv})
cpuid = func(op uint32) (eax, ebx, ecx, edx uint32) {
if op == 0x80000000 || op == 0 {
var ok bool
_, ok = fakeID[op]
if !ok {
return 0, 0, 0, 0
}
}
first, ok := fakeID[op]
if !ok {
if op > maxFunctionID() {
panic(fmt.Sprintf("Base not found: %v, request:%#v\n", fakeID, op))
} else {
// we have some entries missing
return 0, 0, 0, 0
}
}
theid := first[0]
return theid[0], theid[1], theid[2], theid[3]
}
cpuidex = func(op, op2 uint32) (eax, ebx, ecx, edx uint32) {
if op == 0x80000000 {
var ok bool
_, ok = fakeID[op]
if !ok {
return 0, 0, 0, 0
}
}
first, ok := fakeID[op]
if !ok {
if op > maxExtendedFunction() {
panic(fmt.Sprintf("Extended not found Info: %v, request:%#v, %#v\n", fakeID, op, op2))
} else {
// we have some entries missing
return 0, 0, 0, 0
}
}
if int(op2) >= len(first) {
//fmt.Printf("Extended not found Info: %v, request:%#v, %#v\n", fakeID, op, op2)
return 0, 0, 0, 0
}
theid := first[op2]
return theid[0], theid[1], theid[2], theid[3]
}
xgetbv = func(index uint32) (eax, edx uint32) {
first, ok := fakeID[1]
if !ok {
panic(fmt.Sprintf("XGETBV not supported %v", fakeID))
}
second := first[0]
// ECX bit 26 must be set
if (second[2] & 1 << 26) == 0 {
panic(fmt.Sprintf("XGETBV not supported %v", fakeID))
}
// We don't have any data to return, unfortunately
return 0, 0
}
return restorer
}
func TestMocks(t *testing.T) {
zr, err := zip.OpenReader("testdata/cpuid_data.zip")
if err != nil {
t.Skip("No testdata:", err)
}
defer zr.Close()
for _, f := range zr.File {
rc, err := f.Open()
if err != nil {
t.Fatal(err)
}
content, err := ioutil.ReadAll(rc)
if err != nil {
t.Fatal(err)
}
rc.Close()
t.Log("Opening", f.FileInfo().Name())
restore := mockCPU(content)
Detect()
t.Log("Name:", CPU.BrandName)
n := maxFunctionID()
t.Logf("Max Function:0x%x\n", n)
n = maxExtendedFunction()
t.Logf("Max Extended Function:0x%x\n", n)
t.Log("PhysicalCores:", CPU.PhysicalCores)
t.Log("ThreadsPerCore:", CPU.ThreadsPerCore)
t.Log("LogicalCores:", CPU.LogicalCores)
t.Log("Family", CPU.Family, "Model:", CPU.Model)
t.Log("Features:", CPU.Features)
t.Log("Cacheline bytes:", CPU.CacheLine)
t.Log("L1 Instruction Cache:", CPU.Cache.L1I, "bytes")
t.Log("L1 Data Cache:", CPU.Cache.L1D, "bytes")
t.Log("L2 Cache:", CPU.Cache.L2, "bytes")
t.Log("L3 Cache:", CPU.Cache.L3, "bytes")
if CPU.LogicalCores > 0 && CPU.PhysicalCores > 0 {
if CPU.LogicalCores != CPU.PhysicalCores*CPU.ThreadsPerCore {
t.Fatalf("Core count mismatch, LogicalCores (%d) != PhysicalCores (%d) * CPU.ThreadsPerCore (%d)",
CPU.LogicalCores, CPU.PhysicalCores, CPU.ThreadsPerCore)
}
}
if CPU.ThreadsPerCore > 1 && !CPU.HTT() {
t.Fatalf("Hyperthreading not detected")
}
if CPU.ThreadsPerCore == 1 && CPU.HTT() {
t.Fatalf("Hyperthreading detected, but only 1 Thread per core")
}
restore()
}
Detect()
}