[U-Boot] regarding RAM Test

[U-Boot] regarding RAM Test

[Beagle Board]

Hi all,

I wanted to perform a RAM test in u-boot for my DM8148 board. I've used the
"*mtest*" command present in u-boot.
But its taking ages and it looks like a never ending test.

So guys can anyone point me a way to test maximum RAM memory.
Here why i'm asking maximum is if I try it from kernel level then some
amount of RAM will be used up by kernel as well as other applications.

Any thoughts in this regard will be of great help.

[U-Boot] regarding RAM Test

[York Sun]

On 12/02/2013 10:20 AM, Beagle Board wrote:
> Hi all,
> 
> I wanted to perform a RAM test in u-boot for my DM8148 board. I've used the
> "*mtest*" command present in u-boot.
> But its taking ages and it looks like a never ending test.
> 
> So guys can anyone point me a way to test maximum RAM memory.
> Here why i'm asking maximum is if I try it from kernel level then some
> amount of RAM will be used up by kernel as well as other applications.
> 
> Any thoughts in this regard will be of great help.
> 

Just my 2 cents.

Memory testing has two targets. One is to confirm hardware connection.
For this, we have walking 1 test, address test, etc. You can catch
cross-talk, or other "hard" issues. I use POST memory test for this purpose.

The other target is to confirm timing configuration. I found memory test
algorithm is not helpful for this one. I never found any error with
software testing when there is a timing issue. My solution is to rely on
ECC detection and run some memory extensive tests and check ECC status.
The tests I use includes booting Linux, run lmbench, run md5sum on
ramdisk with know files filled with random data and checksum.

Hope this helps.

York