int main(){
    cub::CachingDeviceAllocator alloc(
        false, //skip_cleanup 
        true //debug
    );

    void* ptr;
    alloc.DeviceAllocate(&ptr, 128);
    alloc.DeviceFree(ptr);
    alloc.FreeAllCached();
}

Device 0 allocated new device block at 0x7fffca400000 (512 bytes associated with stream 0).
        0 available blocks cached (0 bytes), 1 live blocks outstanding(512 bytes).
Device 0 returned 512 bytes from associated stream 0.
         1 available blocks cached (512 bytes), 0 live blocks outstanding. (0 bytes)
Device 0 freed 512 bytes.
          1 available blocks cached (0 bytes), 0 live blocks (0 bytes) outstanding.