Re: Kernel 2.6.5-1.358smp

[Ilia Dulgerov <ilia@xxxxxxxxxxxx>]

Hey dude, upgrade your kernel there is  za SMP related bug (and a lot of 
other bug fix exist)  use 2.4.22-1.2188smp or better 2.4.22-1.2193smp if 
your ACPI is not enabled try with 2.4.26!
BTW RedHat kernel for 3.0  has more patches for SMP and more memory and 
generaly for enterprise systems

raffaele.ronchi@xxxxxxxxx wrote:

> Hello all,
> I have installed Fedora Core2 (Kernel 2.6.5-1.358smp) on a system with Xeon MP processors. I ran the same program (multithreaded) on this system and compared the results Vs. what obtained on the same hardware running RH Advanced Server 3.0 (Kernel 2.4.21-9.ELsmp).
>
> Follows sar output:
>
> Linux 2.4.21-9.ELsmp (RH system) 	06/17/2004
>
> 05:00:00 PM       CPU     %user     %nice   %system     %idle
> 05:02:42 PM       all      3.82      0.00      1.20     94.98
> 05:02:47 PM       all      3.36      0.00      1.45     95.19
> 05:02:52 PM       all      3.26      0.00      1.40     95.34
> 05:02:57 PM       all      3.01      0.00      1.20     95.79
> 05:03:02 PM       all      3.51      0.00      1.60     94.88
> 05:03:07 PM       all      3.11      0.00      1.76     95.13
> 05:03:12 PM       all      3.30      0.00      1.55     95.15
>
> ---------------------------------------------------------------------------------------
> Linux 2.6.5-1.358smp (Fedora Core2 system) 	06/17/2004
>
> 04:32:52 PM       CPU     %user     %nice   %system   %iowait     %idle
> 04:35:26 PM       all      5.05      0.00      6.85      0.20     87.89
> 04:35:31 PM       all      5.00      0.00      6.70      0.10     88.21
> 04:35:36 PM       all      4.70      0.00      7.10      0.20     88.01
> 04:35:41 PM       all      4.90      0.00      6.75      0.20     88.16
> 04:35:46 PM       all      5.10      0.00      6.50      0.15     88.24
> 04:35:51 PM       all      4.75      0.00      6.95      0.20     88.10
> 04:35:56 PM       all      5.74      0.00      8.04      0.20     86.01
>
> Both system time and user time are much higher on Fedora.
> Is it something you have already seen happening, or might just be related to kernel configuration ?
>
> Thanks to everybody will reply. In case I can provide more details/mesurements.
> One interesting thing is that the program is running even slower on Fedora.
>
> Regards
>
> Raffaele
>
>
>