Re: Cached file read performance with 6.2-PRERELEASE

2006-12-21 Thread Mike Jakubik
Has anyone tried these tests with 4.x? Well, i did, and i was surprised how good the performance is, it gave me the highest number of all tests, even compared to much faster HW. Although this is all different hardware, it seems like the performance drops the higher the version of FreeBSD is, speci

Re: Cached file read performance

2006-12-21 Thread Eric Anderson
On 12/21/06 19:35, Mark Kirkwood wrote: I recently did some testing on the performance of cached reads using two (almost identical) systems, one running FreeBSD 6.2PRE and the other running Gentoo Linux - the latter acting as a control. I initially started a thread of the same name on -stable,

Re: Cached file read performance

2006-12-21 Thread Adrian Chadd
On 22/12/06, David Xu <[EMAIL PROTECTED]> wrote: I suspect in such a test, memory copying speed will be a key factor, I don't have number to back up my idea, but I think Linux has lots of tweaks, such as using MMX instruction to copy data. I had the oppertunity to study the AMD Athlon XP Optim

Re: Cached file read performance

2006-12-21 Thread Mark Kirkwood
David Xu wrote: Mark Kirkwood wrote: I recently did some testing on the performance of cached reads using two (almost identical) systems, one running FreeBSD 6.2PRE and the other running Gentoo Linux - the latter acting as a control. I initially started a thread of the same name on -stable, bu

Re: Cached file read performance

2006-12-21 Thread David Xu
Mark Kirkwood wrote: I recently did some testing on the performance of cached reads using two (almost identical) systems, one running FreeBSD 6.2PRE and the other running Gentoo Linux - the latter acting as a control. I initially started a thread of the same name on -stable, but it was suggeste

Cached file read performance

2006-12-21 Thread Mark Kirkwood
I recently did some testing on the performance of cached reads using two (almost identical) systems, one running FreeBSD 6.2PRE and the other running Gentoo Linux - the latter acting as a control. I initially started a thread of the same name on -stable, but it was suggested I submit a mail her

Re: Cached file read performance

2006-12-21 Thread Mark Kirkwood
Mark Kirkwood wrote: Anyway on to the results: I used the attached program to read a cached Silly bug in attached program : lseek failure test has 1 instead of -1 (finger trouble). *** readtest.c.orig Fri Dec 22 14:43:42 2006 --- readtest.c Fri Dec 22 14:43:24 2006 *** *** 103,109