Ok, first of all, the transfer speeds obtained with hdparm with the saucy image seem to be unrealistic, because cross checks with dd on files again show much lower speeds (maybe some compiler optimization at work here?).
Secondly, I now have a pointer why HW acceleration is not working: There was no corresponding entry in the am33xx.dtsi ... but it is there now ( http://lkml.org/lkml/2013/9/30/624). So let's see if I can build a working 3.13 Kernel ... On Monday, December 2, 2013 9:20:42 PM UTC+1, [email protected] wrote: > > I'm trying to use the HW AES acceleration on BBB with dm-crypt. > > So far my results have been mixed (see also > https://github.com/beagleboard/kernel/issues/68): > > While it didn't work at all on 3.8 kernels, with 3.12 kernels there were > no errors, but I could not find any indications that dm-crypt is using the > HW AES and the performance was less then expected (about 13MB/s measured > with the methods described in the TI wiki linked below). > > I then tried the 3.2 kernel from TI: > > http://processors.wiki.ti.com/images/8/80/Enabling_DM_Crypt_V4_SDK6_00.pdf > > Unfortunately, I again could not reach the performance described here > (about 13MB/s): > > > http://processors.wiki.ti.com/index.php/AM335x_Crypto_Performance#AM335x_1GHz_OPP_Frequency > > but the method described in the PDF to verify that the HW AES is used > suggested that it was the case (lots of edma interrupts generated). > > Now I'm a bit surprised: I've switched to the newest Ubuntu saucy image > from Robert (again with a 3.12 kernel installed), and the performance is > way higher (above 20MB/s) than listed in the TI wiki for HW accelerated > dm-crypt, but this is again seems to be without the HW AES being used > (performance does not depend on HW AES driver enabled/no edma interrupts > generated even if it is enabled). > > If anyone has thoughts or comments on this, I'd be happy to hear them. > > In the meantime I'll try to investigate further. > > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
