{"command":"write_single_register","port":1,"address":256,"data":1, "device":8}

根据提供的引用内容，我无法找到与问题相关的信息。引用\[1\]是关于ibv_query_port函数的说明，引用\[2\]是关于srpt_unregister_mad_agent函数的代码，引用\[3\]是关于struct ibv_device_attr结构体的定义。请提供更多相关的信息，以便我能够回答您的问题。
#### 引用[.reference_title]
- *1* *3* [【verbs】ibv_get_device_name()|ibv_get_device_list()|verbs api](https://blog.csdn.net/bandaoyu/article/details/116539866)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* [SRP Linux driver 系列九：ib_srpt.c--函数二](https://blog.csdn.net/lincolnjunior_lj/article/details/131793351)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
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