On Mon, 14 May 2001, George France wrote: > > Platform: Dual 667 UP2000, 1.5gig ram, 3 adaptecs with 5 disks total, > > serial console.
All SCSI disks or are you mixing IDE into it? > > Kernel 2.4.4 seems to suffer a *tremendous* performance impact, compared to > > 2.2.19. A 'time make -j4 boot' of the kernel-2.4.4 sources gives the > > following compile-times: > > > > 2.4.4 2.2.19 > > real 3m58 2m38 > > user 4m23 2m23 > > sys 0m14 0m11 > > > > Several other tests seem to indicate a similar decrease in performance wrt > > real-time, some of them being CPU and/or memory-bound only. The VM has been reworked quite a bit. Did you hit swap during any of your tests? Also, is this EV6 or EV67? > > In addition to that, i've noticed, that kernel 2.2.19 frequently crashes, > > after giving the well-known "stuck spinlock" messages in rather random > > processes. No panics are given, the system just freezes completely ( no > > ping and the like ). Take out the RTC and see if that helps. I've had problems with it on my UP2k here and there. I don't think that it is a good solution, personally, but if it works... > > 1. Has anybody ever observed the performance impact, i'm seeing with kernel > > 2.4.x ? 2. Since i moved to kernel 2.4.x very early for various reasons, I > > would like to know, which of the recent 2.2.x kernels can be considered > > stable on a alpha/SMP platform ( ideally being a UP2000 as well ). > > > > I'm a bit confused here ;-) What other cards do you have in the system? Oh, also, bear in mind that the Adaptec driver has changed in 2.4.x, IIRC, so that may explain things by itself :-) C
