> Hello, > > Iam confused on the different result I get when I compile userland on > any machine better then a Dual Core 2.5Ghz 2GB RAM 160GB 7200 SATA / > SATA ii > > On some machines I get a compile time of 45min, other machines 30min.. > and the best of the case I get 30min. Sometimes that machine that > takes 45min is far better hardware then a DualCore, in this case a > QuadCore with SATA II/sata... > > Iam going to use these machines for database and Iam very concerned > about these results > > Based on that I have this question: > > Is it normal that this varies so much? (Afterall a variation from > 35min to 45min represents an increase of about %25 less efficiency!!) > > Is there a better way to benchmark the IO of a Hard Disk on OpenBSD , > what should be the normal of a hard disk scanned as sd SATA/ SATA II > with similar CPU/RAM as mentioned? > > Andres
Hi! You didn't provide too many details. Based on that it could be any of the following: Different CPU (Intel vs. AMD, CPU generations, amount of CPU cache...) Different FSB Different memory setup or technology (integrated vs. on-board memory, controller single-channel vs. dual-channel vs. triple-channel, DDR vs. DDR2 vs. DDR3, ECC vs. noECC, buffered vs. unbuffered, memory speed or timings, ...) Different I/O or SATA controller Different chipset Misconfiguration (BIOS, OS, HDD, ...) Different HDD (platter density, RPM, HDD cache, manufacturer, ...) HDD layout (beginning vs. the end of disk) and probably a ton of others I didn't think of. How much, if at all, should any of these matter? No idea, you tell us :) Regards, Daniel.
