Where can I find the source code of sync_to_device()

leelemni · July 15, 2022, 3:25am

Hi,

I want to deep dive into the principle of ‘buffer.sync_to_device()’ method.

However, I can not find where the internal source code is.

Could anyone can let me know where the internal source code of

“self.device.flush(self.bo, self.offset, self.virtual_address, self.nbytes)” which is sync_to_device() is?

Thanks in advance!

marioruiz · July 15, 2022, 7:53am

Hi @leelemni,

Welcome to our community.

The source code is in the xrt_device file

github.com

Xilinx/PYNQ/blob/59515a9b5de6fad0ff0538bfc50010b16f53c9a8/pynq/pl_server/xrt_device.py#L394


      
              mem_dict = self.mem_dict
              active_mems = [m for m in mem_dict.values()
                             if m['used'] and not m['streaming']]
              if len(active_mems) == 0:
                  raise RuntimeError("No active memories in design")
              elif len(active_mems) > 1:
                  raise RuntimeError("Multiple memories active in design: specify" +
                                     " the memory using the `target` parameters")
              return self.get_memory(active_mems[0])
          
          
def flush(self, bo, offset, ptr, size):
              ret = xrt.xclSyncBO(
                  self.handle, bo, xrt.xclBOSyncDirection.XCL_BO_SYNC_BO_TO_DEVICE,
                  size, offset)
              if ret >= 0x80000000:
                  raise RuntimeError("Flush Failed: " + str(ret))
          
          
def invalidate(self, bo, offset, ptr, size):
              ret = xrt.xclSyncBO(
                  self.handle, bo, xrt.xclBOSyncDirection.XCL_BO_SYNC_BO_FROM_DEVICE,
                  size, offset)

Mario

leelemni · July 15, 2022, 7:58am

Thank you!!

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Where can I find the source code of sync_to_device()

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