Referring to Figure 6-24 , the following rules define timestamp capture: • A PTM Requester must update its stored t1 timestamp when transmitting a PTM Request Message, even if that transmission is a replay. • A PTM Responder must update its stored t2 timestamp when receiving a PTM Request Message, even if received TLP is a duplicate. • A PTM Responder must update its stored t3 timestamp when transmitting a PTM Response or ResponseD Message, even if that transmission is a replay. • A PTM Requester must update its stored t4 timestamp when receiving a PTM Response Message, even if received TLP is a duplicate. ◦ Timestamps must be based on the STP Symbol or Token that frames the TLP, as if observing the first bit of that Symbol or Token at the Port’s pins. Typically this will require an implementation specific adjustment to compensate for the inability to directly measure the time at the actual pins, as the time will commonly be measured at some internal point in the Rx or Tx path. The accuracy and consistency of this measurement are not bounded by this specification, but it is strongly recommended that the highest practical level of accuracy and consistency be achieved. 翻译一下

参考图6-24，以下规则定义了时间戳捕获：• PTM请求者在发送PTM请求消息时，必须更新其存储的t1时间戳，即使该传输是重播。• PTM响应者在接收PTM请求消息时，必须更新其存储的t2时间戳，即使接收到的TLP是重复的。• PTM响应者在传输PTM响应或ResponseD消息时，必须更新其存储的t3时间戳，即使该传输是重播。• PTM请求者在接收到PTM响应消息时，必须更新其存储的t4时间戳，即使接收到的TLP是重复的。◦ 时间戳必须基于框架TLP的STP符号或令牌，就好像在端口引脚上观察该符号或令牌的第一个比特位。通常，这将需要一种特定于实现的调整，以补偿无法直接测量实际引脚时间的能力，因为时间通常会在Rx或Tx路径中的某个内部点测量。此测量的准确性和一致性不受本规范的限制，但强烈建议实现最高实用级别的准确性和一致性。

相关问题

no thread-bound request found: are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? if you are actually operating within a web request and still receive this message,

这个错误信息的意思是：没有找到与请求绑定的线程，可能是在实际的Web请求外部引用了请求属性，或者是在原始接收线程之外处理请求。如果您实际上正在处理Web请求并且仍然收到此消息，可能是由于Web应用程序配置不正确或存在其他问题导致的。

Could not find a package configuration file provided by "catkin" with any of the following names:

Unfortunately, as an AI language model, I cannot determine the precise cause of the error without knowing the context or the specific code you are referring to. However, based on the error message you provided, it seems like your code is missing a package configuration file named "catkin".

This error often occurs when the package that you are trying to build or run depends on the "catkin" package, but the package configuration file for "catkin" cannot be found. To resolve the issue, you may need to install the "catkin" package or check if it is included in your package dependencies.

In general, when you encounter an error message, it is helpful to provide more details about the code you are working with and the steps you took before encountering the error. This will enable others to better understand the issue and provide more targeted solutions.