Known Issues for the Intel Acceleration Stack v1.2.1 AFU Design...

Intel® Acceleration Stack for Intel® Xeon® CPU with FPGAs Version 1.2.1 Release Notes

Download PDF

ID 683480

Date 3/06/2020

Version 1.2.1

Public

Visible to Intel only — GUID: rph1580316316556

Ixiasoft

Known Issues for the Intel Acceleration Stack v1.2.1 AFU Design Examples

Table 5. Known Issues for the Intel Acceleration Stack v1.2.1 AFU Design Examples
Known Issue	Details
Streaming DMA only supports access to host memory.	The streaming DMA basic building blocks (BBBs) can access host or FPGA memory, but the driver does not provide any means for accessing FPGA memory. Status: This limitation will be fixed in a future version of the driver.
DMA AFU test application does not compile for simulation.	Workaround: Include the following header in the `fpga_dma_test.c` file: `#include <unistd.h>` Status: Fix targeted for a future version of the Intel® Acceleration Stack.
DMA AFU simulation ends abruptly due to memory scheduling conflict.	Error message: `ase_top.ase_top_generic.local_mem_model.b_emul[0].emif_ddr4.avs_bfm_inst_ddra.drive_response: Response transaction 33, cycle 3 - schedule conflict` Workaround: None. Status: Fix targeted for a future version of the Intel® Acceleration Stack.
Streaming DMA AFU fails to compile for simulation.	Workaround: To compile the AFU, comment out or modify the below lines in the Makefile: `#CXXFLAGS += -D FPGA_DMA_DEBUG=0 -g -O2 -fPIC -D EMU_MODE=0 -Wall -Wno-unknown-pragmas -I$(TBB_HOME)/include -fpermissive -std=c++11 CXXFLAGS += -D FPGA_DMA_DEBUG=0 -g -O2 -fPIC -D EMU_MODE=0 -Wall -Wno-unknown-pragmas -fpermissive -std=c++11 #LDFLAGS += -L$(TBB_HOME)/lib/intel64_lin/gcc4.7/ #LDFLAGS += -L$(TBB_LIB)` Status: Fix targeted for a future version of the Intel® Acceleration Stack.
Streaming DMA AFU does not work in simulation.	Streaming DMA AFU fails to generate simulation file due to a hardcoded path. Workaround: Update the line paths on lines 6031 and 10283 in `streaming_dma_test_system.qsys` from `/data/dunnikri/qshell/18.0.1/p4/afu/samples` to `../../` Status: Fix targeted for a future version of the Intel® Acceleration Stack.