Memory Tests in U-Boot

Memory Tests in U-Boot

[devendra.devadiga]

Hi,

In U-Boot I found some generic memory tests commands like mtest and post 
tests. But I need complete DDR4 memory test with below algorithms:

* Checkerboard Test
* March C- Test
* Neighborhood Pattern Sensitive Fault

Can I get any reference code for these algorithms in U-Boot ?
Implementation for these algorithms available in any of U-Boot version ?

Thanks and Regards,
Devendra

Re: [yocto] Memory Tests in U-Boot

[Randy MacLeod]

On 11/19/19 7:28 AM, devendra.devadiga@iwavesystems.com wrote:
> Hi,
> 
> In U-Boot I found some generic memory tests commands like mtest and post 
> tests. But I need complete DDR4 memory test with below algorithms:
> 
> * Checkerboard Test
> * March C- Test
> * Neighborhood Pattern Sensitive Fault
> 
> Can I get any reference code for these algorithms in U-Boot ?
> Implementation for these algorithms available in any of U-Boot version ?

I don't know if any of the (too many) versions of u-boot have that
feature. If you are willing to test from userspace, there is memtester:

https://layers.openembedded.org/layerindex/recipe/863/

I don't think it has all of the tests you asked for but
it would be good if you could take a look and report back here
for those interested.

Here's a test run that a web search returned:
https://www.lightsoftai.com/?p=113


Also, the stress-ng has some memory tests including one that tests
neighbour sensitivity:
   https://layers.openembedded.org/layerindex/recipe/104982/

man stress-ng:

galpat-0

galloping  pattern  zeros. This sets all bits to 0 and flips just 1
in 4096 bits to 1. It then checks to see  if the 1s are pulled down
to 0 by their neighbours or of the neighbours have been pulled up
to 1.

Good luck and please let us know what you find,

../Randy

> 
> Thanks and Regards,
> Devendra


-- 
# Randy MacLeod
# Wind River Linux

Re: [yocto] Memory Tests in U-Boot

[Paul Barker]

On Tue, 19 Nov 2019, at 12:28, devendra.devadiga@iwavesystems.com wrote:
> Hi,
> 
> In U-Boot I found some generic memory tests commands like mtest and post 
> tests. But I need complete DDR4 memory test with below algorithms:
> 
> * Checkerboard Test
> * March C- Test
> * Neighborhood Pattern Sensitive Fault
> 
> Can I get any reference code for these algorithms in U-Boot ?
> Implementation for these algorithms available in any of U-Boot version ?

You may be better asking this on the u-boot list <u-boot@lists.denx.de>.

-- 
Paul Barker

Re: [yocto] Memory Tests in U-Boot

[Leon Woestenberg]

[-- Attachment #1: Type: text/plain, Size: 791 bytes --]

Hello,

On Sat, 23 Nov 2019 at 00:40, Paul Barker <paul@betafive.co.uk> wrote:

> On Tue, 19 Nov 2019, at 12:28, devendra.devadiga@iwavesystems.com wrote:
> > Hi,
> >
> > In U-Boot I found some generic memory tests commands like mtest and post
> > tests. But I need complete DDR4 memory test with below algorithms:
> >
> > * Checkerboard Test
> > * March C- Test
> > * Neighborhood Pattern Sensitive Fault
> >
>
We found stressapptest (by Google) the most reliable test for DDR
calibration problems.

We have seen unreliable systems pass other memory tests such as in U-Boot.

Regards, Leon

>
> --
Leon Woestenberg
leon@sidebranch.com
T: +31 40 711 42 76
M: +31 6 472 30 372

Sidebranch
Embedded Systems
Eindhoven, The Netherlands
http://www.sidebranch.com

[-- Attachment #2: Type: text/html, Size: 2301 bytes --]