When Linux started on the s390 over 3 years ago, a lot of work was done to see what Linux on the mainframe was good for. But that was with lower levels of linux (2.2.16, 2.4.7) and slower machines (mp2000, mp3000, g5,g6). Now that Trex is GA, has anyone gone back and re-examined the mythology?
- Is Trex capable of a wider range of applications, with more cpu intensive workloads? - How well do the current kernels (2.4.21 - RHEL3 or SLES8 SP3) scale, both in cpu workloads and I/O workloads. - One of the presentations I noticed from IBM Germany inidicated that a few Linux were better than many linux and a single linux. It turns out the single linux was limited by memory. How does 64bit affect linux performance if given a "lot" of memory. The reasons I speculate is our old friend - bogomips. For various s/390-zSeries processers, they run something like this (SLES8 SP2, 2.4.19 kernel, except for mp2000 at SLES7). mp2000 - less than 200 bogomips 9672-zz7 (g6) 630 bogomips 2064-116 (z1) 820 bogomips 2084-b16 (Trexx GA1) 2400 bogomips! The speed of the top of the line zSeries has increased at four fold in the last 3-4 years. It seems that the literature is lagging what is now available in the field. Is zSeries more competitive now against other platforms than it was four years ago? (caution: my 1749 MHZ intel registers 3538 bogomips, for whatever that is worth). ===== Jim Sibley Implementor of Linux on zSeries in the beautiful Silicon Valley "Computer are useless.They can only give answers." Pablo Picasso __________________________________ Do you Yahoo!? Exclusive Video Premiere - Britney Spears http://launch.yahoo.com/promos/britneyspears/
