On Tue, Feb 25, 2014 at 11:02 AM, Paddu <pradeep.mudig...@gmail.com> wrote:
> Thank all for the kind reply. > > @liyaoshi-> I could find the link you have mentioned. > > @Grissiom -> Currently we are not using Linux, we are using Starterware. > > I shall see if we could implement this using a ASM code. > Cool. IIRC, startware has API to provide access to PMU. If you choose to do it youself, you are certainly have to deal with assembly code -- PMU registers are located in coprocessors. > > On Tuesday, February 25, 2014 11:56:11 AM UTC+9, liyaoshi wrote: > >> From this link , you can see >> >> readtsc() means this only support on x86 ,tsc register is 64bit register >> and clock with main clock , on x86/64 this is can very precise >> >> On ARM, use generic PIT,(maybe you should write your own driver ) , >> >> only limit is almost PIT register is 32bit >> >> >> 2014-02-25 10:49 GMT+08:00 Grissiom <chaos....@gmail.com>: >> >>> On Mon, Feb 24, 2014 at 10:26 PM, Paddu <pradeep....@gmail.com> wrote: >>> >>>> Hi, >>>> >>>> We need some advice in measuring Beaglebone CPU(Cortex-A8) clock cycles. >>>> Is there any way to measure the CPU cycles and use it inside the >>>> program? >>>> I have heard about "ccnt" register but don't know how exactly could we >>>> use that in the program. >>>> Please let me know if there is a reference or pointers on how to >>>> implement the code. >>>> >>>> >>> Do you want to measure cycles in Linux program or baremetal program? If >>> you are on Linux, this link: >>> >>> http://halobates.de/modern-pmus-yokohama.pdf >>> >>> may help you. If not, read the PMU section in the ARM ARM. >>> >>> -- >>> Cheers, >>> Grissiom >>> >>> -- >>> 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...@googlegroups.com. >>> >>> 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 beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > -- Cheers, Grissiom -- 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/groups/opt_out.
