A good friend of mine used to say that many performance problems really are expectation problems.
The strengths of zSeries are not in single-engine clock speed but in massive throughput. It is not trivial to design a benchmark that demonstrates it. Instead of doing end-to-end benchmarks I prefer to look at instrumentation and explain why you see some behaviour. That will help understand how to remove that bottleneck and get single-task throughput to the level that works for you. One of the strong points is virtualization and the hardware support to allow for fast and frequent context switches. Quite often the real test is to see how many other things you can do at the same time without slowing down things. Obviously you're missing most of the virtualization capabilities when you run Linux on zSeries without z/VM. One of the things you miss is the instrumentation. -- Rob van der Heij Velocity Software, Inc http://velocitysoftware.com/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
