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  3. AR# 35034: Design Assistant for PCI Express - Completion Timeouts Cause the System to Freeze

AR# 35034

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Design Assistant for PCI Express - Completion Timeouts Cause the System to Freeze

描述

This article discusses that completion timeouts may result in system hangs.

Note: This Answer Record is a part of the Xilinx Solution Center for PCI Express(Xilinx Answer 34536) TheXilinx Solution Center for PCI Express is available to address all questions related to PCIe. Whether you are starting a new design with PCIe or troubleshooting a problem, use the Solution Center for PCIeto guide you to the right information.

解决方案

The most common cause of a system hang or freeze is due to a completion timeout occurring on the host. In other words, the root complex issued a read to the endpoint and the endpoint does not return a completion.

The user needs to ensure the application is draining incoming packets and returning completions for any Non-Posted packets. In most cases these will be memory reads.

If a completion timeout is expected, use ChipScope analyzer on the user application interface to ensure completions are being returned for received memory reads.

Revision History
08/13/2010 - Initial Release

链接问答记录

相关答复记录

Answer Number 问答标题 问题版本 已解决问题的版本
34085 Design Assistant for PCI Express - Hardware Debug N/A N/A
35033 Design Assistant for PCI Express - Device is recognized by system, but problems occur N/A N/A
35000 Design Assistant for PCI Express - What happens if the power if the FPGA is re-configured, power is removed, or card removed during normal operation of the link N/A N/A
34538 Xilinx Solution Center for PCI Express - Design Assistant N/A N/A
AR# 35034
日期 12/15/2012
状态 Active
Type 综合文章
器件 More Less
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