You may also want to post this to the TI e2e forum.
On Fri, Apr 25, 2014 at 5:16 AM, <[email protected]> wrote: > Hi, > > I have a similar problem with my Beaglebone and Starterware. To check out > the performance of Starterware and Beaglebone I do the following in my > main-Function: > > while(1) > { > GPIOPinWrite(GPIO_INSTANCE_ADDRESS,28, GPIO_PIN_HIGH); > > * for*(i=0; i<35000; i++) > { > x = *sqrt*(3.141592654); > } > > * GPIOPinWrite*(GPIO_INSTANCE_ADDRESS, 28, GPIO_PIN_LOW); > > * for*(i=0; i<35000; i++) > { > x = *sqrt*(3.141592654); > } > } > > As you can see I toggle a pin and in between I do sqrt(pi) 35000 times. > Using an oscilloscope I measure the period /frequency on that pin. > > At first I got: T = 18 s !!!! > > Then I found this post and enabled Cache and MMU like in the example: > \\StarterWare\examples\evmskAM335x\uart_edma\uartEcho_edma.c > > After that i measured: T = 500 ms / f = 2 Hz > > This is still quite slow! I run a program with the same functionality > using the Linux Distribution Angström on the beaglebone, there I measured a > period of T = 1.1 ms / f = 1 kHz . > > So what is going on with the Starterware being so slow? Do I have to > enable the Cache / MMU differently or can't I go faster with Starterware??? > I read a few posts so far where people wrote that they solved this speed > problem by enabling the cache and mmu but it still is fu***** slow : ) why > ??? help me please ;) > > -- > 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/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 [email protected]. For more options, visit https://groups.google.com/d/optout.
