maybe a compiler flag difference in the packages such as one was built with 03 the other 02?
Just a guess On 12/07/2013 09:43 AM, [email protected] wrote: > I can confirm that HW acceleration is working with 3.13-rc3 ... > however it is way slower (9 MB/s) than the SW AES, especially the new > NEON optimized AES (CONFIG_CRYPTO_AES_ARM_BS). > > On Friday, December 6, 2013 9:02:41 PM UTC+1, [email protected] wrote: > > 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 > <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 > <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 > > <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 > > <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. -- 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.
