GeneTinderholm commented on issue #279:
URL: https://github.com/apache/arrow-go/issues/279#issuecomment-2664057386
Update: Go 1.24 does not seem to have removed the issue. It took a while to
get a deployment going on a non-production machine that had avx2 instructions.
I seem to have narrowed it down to something to do with tracing. The following
program exits almost immediately:
```go
package main
import (
"fmt"
"github.com/apache/arrow-go/v18/internal/utils"
"golang.org/x/exp/rand"
"golang.org/x/sys/cpu"
"log"
"math"
"os"
"reflect"
"runtime"
"runtime/trace"
"sync"
)
func main() {
prettyPrintCPU()
if f, err := os.Create("trace.out"); err != nil {
log.Fatal("could not open trace file")
} else {
defer f.Close()
trace.Start(f)
defer trace.Stop()
}
runtime.GOMAXPROCS(runtime.GOMAXPROCS(-1) * 2) // this was put in to
have more goroutine swapping, not sure if it's actually required
wg := sync.WaitGroup{}
wg.Add(1)
var arr []int32
for range 1_000_000 {
arr = append(arr, int32(rand.Int()%math.MaxInt32))
}
for range 10_000 {
go func() {
for {
minVal, maxVal := utils.GetMinMaxInt32(arr)
if rand.Int()%1_000_000 == 0 {
fmt.Println(minVal, maxVal)
}
}
}()
}
wg.Wait()
}
func prettyPrintCPU() {
cpuInfo := cpu.X86
val := reflect.ValueOf(cpuInfo)
fmt.Println("CPU INFO:")
for i := range val.NumField() {
field := val.Type().Field(i)
fieldVal := val.Field(i)
fmt.Println(field.Name, fieldVal)
}
}
```
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