testing - What are the primary differences between a testbed and a simulator?

Question

Apologies for the slightly vague title. Im having trouble discerning the difference between the two. For instance, more often than not when I see simulation(of Real Time Systems) I notice many who modify the linux kernels (2.6.xx the exact one eludes me). Then I see other software that are written in C++, Ada, and whatnot that don't modify any kernels but also do simulation of real time systems.

Then I come across the term testbed. Is that not a form of a simulator also? How are they similar and how are they not alike?

Answer 1

我建议你做一些研究。例如，

• http://en.wikipedia.org/wiki/Testbed
• http://en.wikipedia.org/wiki/Simulator

基本上，测试平台是一个测试系统，它可以使用某些输入（动作等）来锻炼（刺激）另一个系统，并将该系统的输出与预期输出进行比较。模拟器是模拟另一个系统行为的系统。例如，飞行模拟器是一种模拟飞机飞行的设备。

结果，您可以说测试平台是“模拟”用户输入的系统，但这并不准确：它可能会刺激（注意刺激不是模拟）具有输入的系统，但它不会假装是用户或者尝试预测用户接下来会做什么，而不是简单地获取输出并将它们与预期输出进行比较。

Answer 2

Testbed = 一个可以执行任务并返回结果的真实系统。

模拟器=任务执行的近似模仿，而不是实际执行。