diff --git a/core/mount/mount_idmapped_linux_test.go b/core/mount/mount_idmapped_linux_test.go
index 1dd36d2e3..b399d8348 100644
--- a/core/mount/mount_idmapped_linux_test.go
+++ b/core/mount/mount_idmapped_linux_test.go
@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"sync"
 	"syscall"
 	"testing"
 
@@ -29,6 +30,34 @@ import (
 	"golang.org/x/sys/unix"
 )
 
+func BenchmarkBatchRunGetUsernsFD_Concurrent1(b *testing.B) {
+	for range b.N {
+		benchmarkBatchRunGetUsernsFD(1)
+	}
+}
+
+func BenchmarkBatchRunGetUsernsFD_Concurrent10(b *testing.B) {
+	for range b.N {
+		benchmarkBatchRunGetUsernsFD(10)
+	}
+}
+
+func benchmarkBatchRunGetUsernsFD(n int) {
+	var wg sync.WaitGroup
+	wg.Add(n)
+	for i := 0; i < n; i++ {
+		go func() {
+			defer wg.Done()
+			fd, err := getUsernsFD(testUIDMaps, testGIDMaps)
+			if err != nil {
+				panic(err)
+			}
+			fd.Close()
+		}()
+	}
+	wg.Wait()
+}
+
 var (
 	testUIDMaps = []syscall.SysProcIDMap{
 		{ContainerID: 1000, HostID: 0, Size: 100},