On Tue, 2008-03-18 at 21:20 +0900, John Summerfield wrote: > Mark Post wrote: > > > Just to satisfy my own curiosity, I ran a kernel compile on the z10 guest. > > With only one virtual processor defined to the guest, it finished > > in 4 minutes. If I'd had two processors defined, I'm sure it would > > have been much less than that. > > Obviously I need a new computer, but probably your configuration was > relatively simple. > > I've just been building kernels (rpm-sized Fedora nines) on a Core2 Duo > with 64-bit Linux. Takes around an hour per kernel.
You can not compare an x86 kernel build with a s390 build (or any other architecture). The reason is twofold: 1) the set of drivers you are building is different, x86 has lots of drivers where s390 only has a few; 2) the compiler generates code for a different architecture. What you can do is to install a cross toolchain for s390 and compare cross vs. native. > Hand-configured to what I think I need was 2-5 minutes. My personal best has been a kernel build on a 16 way z10, it finished in 32 seconds. There is not enough parallelism in a s390 kernel build to scale nicely on a 16 way - just in case anybody dreams of doing a kernel build in less than 10 seconds and a 32 or 64 way.. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin. ---------------------------------------------------------------------- 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
