Create memory performance and error testing solution

[mithro]

From @mithro on July 17, 2014 6:27

Something like memcheck or similar.

Performance things to check;

• Write a large contiguous block.
• Read a large contiguous block.
• Write at random locations.
• Read at random locations.
• How interleaving read/write operations affects performance.
• Compare "width" (1 byte, 2 bytes, 4 bytes, 8 bytes).

"Integrity" checking.

• http://opencores.org/websvn,filedetails?repname=ion&path=%2Fion%2Ftrunk%2Fsrc%2Fmemtest%2Freadme.txt&rev=193
• http://www.memtest86.com/technical.htm
• https://github.com/Reisswolf/ztex/blob/master/examples/usb-fpga-1.15/1.15d/memtest/fpga/memtest.vhd
• http://www.barrgroup.com/Embedded-Systems/How-To/Memory-Test-Suite-C

Integrity checking is related to performance. Bump the clock speed up - do integrity checking, repeat until you have errors.

JoelW has some good information about the MIG on the Atlys board at http://www.joelw.id.au/FPGA/XilinxMIGTutorial

Copied from original issue: timvideos/HDMI2USB-jahanzeb-firmware#55

[mithro]

https://github.com/timvideos/HDMI2USB-misoc-firmware/issues/143

[mithro]

It would be really useful to know the absolute current memory performance achievable on each of the boards (and how it changes under different read/write profiles).

[mithro]

We are starting to have some of this with the bist stuff.

See https://github.com/timvideos/HDMI2USB-litex-firmware/blob/master/firmware/bist.c && https://github.com/timvideos/HDMI2USB-litex-firmware/blob/master/targets/nexys_video/ddr3.py