Re: Memtest-SDRAM

[Wolfgang Denk <wd@denx.de>]

In message <61cc712d0511201058p367df361i7e46591336918712@mail.gmail.com> you wrote:
>
> > A simple test is: if Linux is running  without  problems  under  load
> > than there are no problems with your SDRAM.
> 
> Yes, but determining the proper load to test with can be tricky. 

Ummm.. I disagree. Avtually it's pretty simple. Boot the system  with
root  file  system  mounted  over  NFS.  The  compile  a Linux kernel
natively on the board. This is doing all you want: stressing  network
(lots  of  DMA),  stressing  the memory (lots of context switches and
heavy RAM use), etc. If your system survives this,  you  can  be  98%
sure that it will pass any other test as well.

> E.g., I had a subtle memory timing issue that only turned up under
> very peculiar circumstances under linux; this was very difficult to

Of course there are really weird cases,  but  fortunaltey  these  are
rare exceptions.

Best regards,

Wolfgang Denk

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