assertNotNull(recvRegion.getBuffer(), "Receive region buffer should not be null");

            // Test buffer pooling statistics
            long initialAllocated = bufferManager.getTotalAllocated();
            long initialActive = bufferManager.getActiveRegions();

            assertTrue(initialAllocated >= 2, "Should have allocated at least 2 regions");

        }
        
        while ((region = availableReceiveRegions.poll()) != null) {
            region.close();
            totalReleased.incrementAndGet();
        }
    }
    
    public long getTotalAllocated() { return totalAllocated.get(); }
    public long getTotalReleased() { return totalReleased.get(); }
    public long getActiveRegions() { return totalAllocated.get() - totalReleased.get(); }
}
```