Kria™ K260 SOM Starter Kit NLP SmartVision Tutorial

Hardware Architecture of the Accelerator

Hardware Architecture of the Accelerator¶

Preprocessing IPs and DPU¶

The Vitis™ software platform overlay includes DPU, as shown in the following figure.

IP_overlay_and_connection_block_diagram

The DPU IP can be configured, and for this design, the following features should be enabled:

Channel augmentation
Depth-wise convolution
Average pooling
Relu, LeakyRelu and Relu6
URAM enable

To learn more about the DPU, please refer the PG338

As shown in the following table, we integrate the DPU in the nlp_smartvision platform. We analysis the utilization and do some optimizations of the whole hardware design.

Resource usage of current design (estimated)

	LUTs	BRAM	DSP	URAM
K26 Resource	117120	144	1248	64
Platform(4K)	24425	43.5	46	1
DPU B3136	45517	67	548	44
Total used	50%	76.7%	47.6%	70.3%

As shown in the following table, we estimated DPU performance and overall power on K26 chip (including all the other IPs). The DPU is assumed to run at 300MHz.

DPU performance and power (estimated)

	TOPS (Peak)	TOPS (DenseBox)1	Power (Overall)2
B3136	0.92	0.25	7.9W

Note:

We use DenseBox_640x360 model to estimate the real performance of DPU, and this model has 1.1GOPs;
We can only estimate the overall power of K26 (including DPU and other IPs)

As shown in Table 3, DPU B3136 bandwidth requirements.

Table 3 – DPU B3136 bandwidth requirements

Operation	Peak	Average
Write (MB/s)	1300	440
Read (MB/s)	6200	2600

Next Steps¶

Software Architecture of the Platform
Go back to the KV260 NLP Smartvision design start page

References¶

DPU

License¶

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License.

You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.