Hi Hector, On Tue, May 16, 2017 at 1:15 PM, Palacios, Hector <[email protected]> wrote: > Greetings, > > I'm adding support to a 1GiB DDR3 chip that internally has two dies. I have > configured the i.MX6UL memory controller for using two chip selects and > assigned 512MiB to each. Although the RAM seems to work fine I'm experiencing > extremely slow performance compared to a similar 1GiB chip with only one die > (one chip select). > > Testing one mtest loop over the first 496MiB takes: > - 5s on the single die chip > - 1m 16s on the dual die chip > > I have run different memory benchmark tools in Linux like > https://github.com/bingmann/pmbw.git and both memories perform similarly, but > for some reason I see this weird behavior in U-Boot (v2015.04) with 'mtest'. > The CONFIG_SYS_MEMTEST_START and CONFIG_SYS_MEMTEST_END are defined within > secure limits and 'mtest' is not failing... it's just very slow. > > Am I missing something obvious?
It is hard to tell without seeing your code. What about adding your mx6ul board support upstream? _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
