diff --git a/pdu/bufpool_test.go b/pdu/bufpool_test.go
new file mode 100644
index 0000000..22d5e3a
--- /dev/null
+++ b/pdu/bufpool_test.go
@@ -0,0 +1,143 @@
+package pdu
+
+import (
+	"sync"
+	"testing"
+)
+
+func TestRetrieveBufferOfRequestedSize(t *testing.T) {
+	bpm := &BufferPoolManager{
+		pools: make(map[int]*sync.Pool),
+		mu:    sync.Mutex{},
+	}
+
+	size := 1024
+	buffer := bpm.GetBuffer(size)
+
+	if buffer == nil {
+		t.Fatalf("Expected buffer, got nil")
+	}
+
+	if len(*buffer) != size {
+		t.Errorf("Expected buffer size %d, got %d", size, len(*buffer))
+	}
+}
+
+func TestRequestBufferSizeZero(t *testing.T) {
+	bpm := &BufferPoolManager{
+		pools: make(map[int]*sync.Pool),
+		mu:    sync.Mutex{},
+	}
+
+	size := 0
+	buffer := bpm.GetBuffer(size)
+
+	if buffer == nil {
+		t.Fatalf("Expected buffer, got nil")
+	}
+
+	if len(*buffer) != size {
+		t.Errorf("Expected buffer size %d, got %d", size, len(*buffer))
+	}
+}
+
+func TestConcurrentAccessToBufferPool(t *testing.T) {
+	bpm := &BufferPoolManager{
+		pools: make(map[int]*sync.Pool),
+		mu:    sync.Mutex{},
+	}
+
+	size := 1024
+	var wg sync.WaitGroup
+	numRoutines := 100
+
+	for i := 0; i < numRoutines; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			buffer := bpm.GetBuffer(size)
+			if buffer == nil {
+				t.Errorf("Expected buffer, got nil")
+			}
+			if len(*buffer) != size {
+				t.Errorf("Expected buffer size %d, got %d", size, len(*buffer))
+			}
+		}()
+	}
+
+	wg.Wait()
+}
+
+func TestGetBufferLockUnlock(t *testing.T) {
+	bpm := &BufferPoolManager{
+		pools: make(map[int]*sync.Pool),
+		mu:    sync.Mutex{},
+	}
+
+	size := 1024
+	buffer := bpm.GetBuffer(size)
+
+	if buffer == nil {
+		t.Fatalf("Expected buffer, got nil")
+	}
+
+	if len(*buffer) != size {
+		t.Errorf("Expected buffer size %d, got %d", size, len(*buffer))
+	}
+}
+
+func TestVerifyPoolCreationForNewSizes(t *testing.T) {
+	bpm := &BufferPoolManager{
+		pools: make(map[int]*sync.Pool),
+		mu:    sync.Mutex{},
+	}
+
+	size := 512
+	buffer := bpm.GetBuffer(size)
+
+	if buffer == nil {
+		t.Fatalf("Expected buffer, got nil")
+	}
+
+	if len(*buffer) != size {
+		t.Errorf("Expected buffer size %d, got %d", size, len(*buffer))
+	}
+}
+
+func TestBufferPoolManagerGetBuffer(t *testing.T) {
+	bpm := &BufferPoolManager{
+		pools: make(map[int]*sync.Pool),
+		mu:    sync.Mutex{},
+	}
+
+	size := 1024
+	buffer := bpm.GetBuffer(size)
+
+	if buffer == nil {
+		t.Fatalf("Expected buffer, got nil")
+	}
+
+	if len(*buffer) != size {
+		t.Errorf("Expected buffer size %d, got %d", size, len(*buffer))
+	}
+}
+
+func TestGetBufferWithMultipleSizes(t *testing.T) {
+	bpm := &BufferPoolManager{
+		pools: make(map[int]*sync.Pool),
+		mu:    sync.Mutex{},
+	}
+
+	sizes := []int{512, 1024, 2048}
+	for _, size := range sizes {
+		buffer := bpm.GetBuffer(size)
+
+		if buffer == nil {
+			t.Fatalf("Expected buffer for size %d, got nil", size)
+		}
+
+		if len(*buffer) != size {
+			t.Errorf("Expected buffer size %d, got %d", size, len(*buffer))
+		}
+	}
+}
diff --git a/pdu/global.go b/pdu/global.go
new file mode 100644
index 0000000..6117068
--- /dev/null
+++ b/pdu/global.go
@@ -0,0 +1,8 @@
+package pdu
+
+import "sync"
+
+var byteBufferPool = &BufferPoolManager{
+	pools: make(map[int]*sync.Pool),
+	mu:    sync.Mutex{},
+}