HeteroCL Integration

Author: Jie Wang (jiewang@cs.ucla.edu)

This page summarizes some issues when integrating AutoSA with HeteroCL.

Issue 1: Generating HCL-compatible outputs

To generate HCL-compatible code, we will need to add the flags --hcl --hls when compiling the program. Below is the example command:

./autosa ./autosa_tests/mm/kernel.c \
--config=./autosa_config/autosa_config.json \
--target=autosa_hls_c \
--output-dir=./autosa.tmp/output \
--sa-sizes="{kernel[]->space_time[3];kernel[]->array_part[16,16,16];kernel[]->latency[8,8];kernel[]->simd[2]}" \
--simd-info=./autosa_tests/mm/simd_info.json \
--host-serialize \
--hcl \
--hls

Issue 2: Generating kernels with AXI Stream interface

To generate AXI Stream interface, we will need to enable host serialization and generate the HLS host by adding the flag --axi-stream --hls --host-serialize. Below is the example command:

./autosa ./autosa_tests/mm/kernel.c \
--config=./autosa_config/autosa_config.json \
--target=autosa_hls_c \
--output-dir=./autosa.tmp/output \
--sa-sizes="{kernel[]->space_time[3];kernel[]->array_part[16,16,16];kernel[]->latency[8,8];kernel[]->simd[2]}" \
--simd-info=./autosa_tests/mm/simd_info.json \
--host-serialize \
--hcl \
--axi-stream \
--hls

Issue 3: Hanging kernels (pending)

The 8x8 GEMM kernel without host serialization will hang on-board. The kernel with host serialization can pass the on-board testing. We are still debugging this issue. The command for this design:

./autosa ./autosa_tests/large/mm/kernel.c \
--config=./autosa_config/autosa_config.json \
--target=autosa_hls_c \
--output-dir=./autosa.tmp/output \
--sa-sizes="{kernel[]->space_time[3];kernel[]->array_part[256,256,512];kernel[]->latency[32,32];kernel[]->simd[8]}" \
--simd-info=./autosa_tests/large/mm/simd_info.json \
--hcl \
--hls