On Tue, May 15, 2001 at 08:30:27AM -0400, Raul Miller wrote: > Todd Finney pointed me at a site documenting some kernel benchmarks. > > These benchmarks show that on a pentium III, lmbench doesn't gain any > improvements over the performance of kernels which didn't offer the > pentium III optimizations: > > http://euclid.nmu.edu/~benchmark/
That's an incorrect conclusion if I read the report right: : The format of the configuration has changed slightly from kernel to : kernel, so we chose the options that were most similar. As we compiled : new kernels we saw new options that were not available before. Since : we are using a fairly new computer and some old kernels, we could : not always choose the exact options for our hardware. For example, : we did not have the choice of a Pentium III processor until kernel : version 2.4.0-test4. Before that, we chose the closest processor: the : Pentium Pro. For the most part, we were able to get the configurations : nearly identical. In configuring we also tried to have as few modules as : possible, especially for the kernels that were compiled on our secondary : computer with gcc v. egcs 2.91.66. For those kernels we did not want : any modules. We then transferred the image file to our primary computer : to boot from. In the end, we had nineteen kernels, all configured as : closely as possible. So what they're saying is that they switched from PPro to PIII at 2.4.0-test4. In reality, there is no difference whatsoever between the two choices which explains why no difference was observed in their performance. This has no bearing on the difference in performance between a kernel optimised for PPro and one optimised for 386 running ona PIII. -- Debian GNU/Linux 2.2 is out! ( http://www.debian.org/ ) Email: Herbert Xu ~{PmV>HI~} <[EMAIL PROTECTED]> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
