On 11/29/14, 7:50 AM, "Robert Nelson" <robertcnel...@gmail.com> wrote:
>On Wed, Nov 26, 2014 at 2:38 PM, John Syn <john3...@gmail.com> wrote: >> >> On 11/26/14, 7:59 AM, "Robert Nelson" <robertcnel...@gmail.com> wrote: >> >>>On Tue, Nov 25, 2014 at 4:42 PM, Nick Apperley <napper...@gmail.com> >>>wrote: >>>> Can't see the OpenJDK 8 build. I take it the build failed? >>>> >>>> Have some fantastic news on the Ubuntu front. Various OpenJDK 8 >>>>packages via >>>> an unofficial PPA are available for Ubuntu 12.04 (Precise) and 14.04 >>>> (Trusty). >>> >>>So it only took 38 hours 19 minutes. ;) >> So the Quad CortexA9 took 5 days (120 hours) and the OMAP5 took 38 hours >> which is more then 3X performance. My bet is the build was running all >> CPUs close to 100% for the entire build so this would be a good >>comparison. > >So over thanksgiving i let my quad wand do the same task: > >omap5_uevm: (i was also building cloud9 during week, let's say 95% of >the time was openjdk) >Build needed 38:19:47, 6215244k disc space > >wand quad: (i was out of state while this was running, so 100% core >usage..) >Build needed 50:06:26, 6215460k disc space > >The dual a15's come out to 30% faster then the quad a9's... Interesting. http://www.arm.com/products/processors/cortex-a/cortex-a15.php In this article, ARM says the CortexA15 is 2X performance compared to the CortexA9, so 2xA15 = 4xA9; however, the OMAP5432 is running at 1.5MHz and the Wandboard running at 1MHz, so given that, I would expect the OMAP5 to be about 50% faster. Clearly Debian are running much slower hardware. Regards, John > >Regards, > >-- >Robert Nelson >http://www.rcn-ee.com/ > >-- >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 beagleboard+unsubscr...@googlegroups.com. >For more options, visit https://groups.google.com/d/optout. -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
