AnsweredAssumed Answered

Stressapptest crashes immediately

Question asked by Norbert Stefanovski on Nov 2, 2015
Latest reply on Mar 3, 2016 by Mark Middleton

Hello out there,

 

i'm facing a DDR3 problem on a custom design with i.MX6. I calibrated the DDR3 with DDR Stress Test (2.2.0).

Did the write leveling succesfully, the dqs gating succesfully as well as the read and write calibration.

The DDR stress tester runs without any errors. (Here are the calibration results)

 

  MMDC registers updated from calibration

 

   Write leveling calibration

   MMDC_MPWLDECTRL0 ch0 (0x021b080c) = 0x00150019

   MMDC_MPWLDECTRL1 ch0 (0x021b0810) = 0x0017000E

   MMDC_MPWLDECTRL0 ch1 (0x021b480c) = 0x00040019

   MMDC_MPWLDECTRL1 ch1 (0x021b4810) = 0x0012001B

 

 

   Read DQS Gating calibration

   MPDGCTRL0 PHY0 (0x021b083c) = 0x43200324

   MPDGCTRL1 PHY0 (0x021b0840) = 0x026C0268

   MPDGCTRL0 PHY1 (0x021b483c) = 0x43080314

   MPDGCTRL1 PHY1 (0x021b4840) = 0x03140268

 

   Read calibration

   MPRDDLCTL PHY0 (0x021b0848) = 0x40383438

   MPRDDLCTL PHY1 (0x021b4848) = 0x3C383442

 

   Write calibration

   MPWRDLCTL PHY0 (0x021b0850) = 0x342E3A34

   MPWRDLCTL PHY1 (0x021b4850) = 0x402E423A

 

Success: DDR calibration completed!!!

 

As soon as I boot into linux and run the stressapptest from google it crashes almost immediately.

Sometimes I get some miscompare results showing that the two least significant bytes are wrong.

But most of the time the application just crashes with different types of errors.

 

 

Has anyone any idea what is happening here ?

 

Thanx for your help

 

Norbert

Outcomes