Re: 2.6.2-rc2 Interactivity problems with SMP + HT

[Robert M. Hyatt]

It might be some IDE disk I/O that results from flushing buffers or 
whatever.  I don't see this on my SCSI boxes, but I have seen an IDE 
box get sluggish at times due to I/O.

On Thu, 29 Jan 2004, Nick Piggin 
wrote:

> 
> 
> Catalin BOIE wrote:
> 
> >Hello!
> >
> >First, thank you very much for the effort you put for Linux!
> >
> >I have a Intel motherboard with SATA (2 Maxtor disks).
> >CPUs: 2 x 2.4GHz PIV HT = 4 processors (2 virtual)
> >1 GB RAM.
> >
> >Load: postgresql and apache. Very low load (3-4 clients).
> >
> >RAID: Yes, soft RAID1 between the 2 disks.
> >
> >I have times when the console freeze for 3-4 seconds!
> >2.6.0-test11 had the same problem (maybe longer times).
> >2.6.1-rc2 worked good in this respect but crashed after 2 days. :(
> >2.6.2-rc2 is back with the delay.
> >
> >Do you know why this can happen?
> >
> >
> 
> There haven't been many scheduler changes there recently so
> maybe its something else.
> 
> But you could try the latest -mm kernels. They have some
> Hyperthreading work in them (you need to enable CONFIG_SCHED_SMT).
> 
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-- 
Robert M. Hyatt, Ph.D.          Computer and Information Sciences
hyatt@xxxxxxx                   University of Alabama at Birmingham
(205) 934-2213                  136A Campbell Hall
(205) 934-5473 FAX              Birmingham, AL 35294-1170

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