PCIe bandwidth degradation in Intel® Open FPGA Stack (OFS) version 2.0.0

Description

When you test Intel® Open FPGA Stack v2.0.0 PCIe bandwidth, you may find the PCIe bandwidth performance degradation as below:

	PCIe Server	Read BW(GB/s)	Write BW(GB/s)	Read+Write(GB/s)
IOFS V2.0.0	Gen4X16	~16	~16	~26
KPI numbers	Gen4x16	~20	~20	~34

 

Resolution

This problem is fixed in Intel® Open FPGA Stack v2.1.0 and above.

You should upgrade your OFS version to v2.1.0 and above. What’s more, you should use the below commands to test the PCIe bandwidth:

host_exerciser --mode read --cls cl_4 --continuousmode true --contmodetime 10 lpbk
host_exerciser --mode write --cls cl_4 --continuousmode true --contmodetime 10 lpbk
host_exerciser --mode trput --cls cl_4 --continuousmode true --contmodetime 10 lpbk