标签：ash ext one equal auto cte activity target self
最近在找PCIe/NVMe协议分析仪，发现一款软件分析仪：busTRACE,非常不错的工具，对于从事协议开发的同胞们，是个福利，下面把硬件和软件两种分析仪的各自的优势比较了一下（来自busTrace文档），供参考学习：
Hardware
Analyzer Advantages over busTRACE 硬件协议分析仪的优势
A hardware analyzer provides you the ability to capture the actual physical communications that occur on the bus; for example the handshaking that occurs between the host and target. busTRACE is unable to show you this low-level detail.
If you want to view detailed timing analysis, such as the time to send the command, data, messaging, etc., then only a hardware analyzer can show you this type of low-level detail. busTRACE shows you when an I/O starts and when it completes, with a timing analysis of the entire I/O sequence (not the individual state transitions).
Because busTRACE is a software tool, if the Windows PC crashes, any captured I/O activity will be lost. You can use a remote capture, or capture to file, to try and limit your exposure, but results may be limited. A hardware analyzer is not affected by system crashes.
In discussing busTRACE advantages, we talk about the benefits busTRACE provides because it captures and analyzes I/O activity from the operating system‘s perspective. There are equal benefits from viewing the I/O activity from the hardware perspective. Here, you are seeing the exact physical communication going on between the host and target. This can help you diagnose problems, particularly timing problems or hardware problems.
busTRACE supports Windows 7 (and above) PCs. Hardware bus analyzers do not have any such restrictions and can be run independent of the OS you are using.
busTRACE Advantages over a Hardware Analyzer 软件协议分析仪busTRACE的优势
Hardware bus analyzers typically cost ten to twenty times as much as busTRACE. For the cost of one hardware bus analyzer, you could provide each engineer in a department their own copy of busTRACE 10.0.
busTRACE can capture I/O activity across a wide variety of bus architectures including USB, USB 2.0, USB 3.0, ATA, SATA, ATAPI, Fibre Channel, SCSI, iSCSI, 1394 (storage I/O only), RAID, SAS, PCIe, MultiPath, and more. Hardware analyzers typically support only one type of bus architecture. If they do support more than one, you usually need to purchase an additional hardware "pod" for the new architecture thereby increasing your cost even further.
busTRACE is simpler to use than conventional hardware bus analyzers. When you run busTRACE, you simply place a checkmark on the devices you are interested in analyzing and then click on the Capture button. A detailed bus capture then occurs. The user friendly busTRACE interface, with powerful bus analysis features, is designed to be used by any engineer from junior level to the most senior level. Hardware analyzers, on the other hand, typically require a specialized skill that only the most senior engineers have.
busTRACE prides itself on not just showing you a dump of hex data that was sent or received from a device. busTRACE will look at the data and decode it into human readable terms. For example, we decode Command Descriptor Blocks (CDBs) in a format nearly identical to the format you would see in the device‘s command specification. This greatly speeds up your bus analysis efforts.
Keep in mind that busTRACE is capturing I/O activity from the operating system‘s perspective. This can be advantageous in a number of ways.
busTRACE 10.0 is MUCH more than just a bus analyzer. It is a complete suite of bus and device analysis tools. You can capture I/O activity, send any command, automatically look for any firmware bugs, simulate hardware faults, build simple CDB scripts, and so much more.
正所谓：
既生瑜何生亮，两者生来会打仗。矛盾共存之为道，两者结合更有效。
busTrace VS HW protocol analyzer - 好东西推荐
标签：ash ext one equal auto cte activity target self
原文地址：http://www.cnblogs.com/helloworldspace/p/6755398.html
