Intel® Acceleration Stack for Intel® Xeon® CPU with FPGAs 1.0 Errata

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ID 683637
Date 6/22/2018
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Document Table of Contents x
Intel® Acceleration Stack for Intel® Xeon® CPU with FPGAs 1.0 Errata
Intel® Acceleration Stack for Intel® Xeon® CPU with FPGAs 1.0 Errata x
Flash Fallback Does Not Meet PCIe Timeout Unsupported Transaction Layer Packet Types JTAG Timing Failures May Be Reported in the FPGA Interface Manager fpgabist Tool Does Not Pass Hexadecimal Bus Numbers Properly Possible Low dma_afu Bandwidth Due to memcpy Function regress.sh -r Option Does Not Work With dma_afu Intel® Acceleration Stack for Intel® Xeon® CPU with FPGAs 1.0 Errata Revision History
Intel® Acceleration Stack for Intel® Xeon® CPU with FPGAs 1.0 Errata

Possible Low dma_afu Bandwidth Due to memcpy Function

Description

fpgabist may report lower bandwidth for the dma_afu but not the native loopback 3 (NLB3) due to the use of the memcpy function in the dma_afu driver.

Workaround

You can workaround this erratum by removing memcpy from the dma_afu driver code and adding code to accept buffers from the user that have been pre-pinned. For use with OpenCL* , there is no current workaround.

Status

Affects: Intel® Acceleration Stack 1.0 Beta and Production

Status: Planned fix in Intel® Acceleration Stack 1.1

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