Hello Arve, On Thu, Nov 15, 2012 at 9:11 AM, Arun KS <arunks.li...@gmail.com> wrote: > Hello Arve, > > On Thu, Nov 15, 2012 at 4:55 AM, Arve Hjønnevåg <a...@android.com> wrote: >> On Wed, Nov 14, 2012 at 6:04 AM, Arun KS <arunks.li...@gmail.com> wrote: >>> Hello, >>> >>> I m trying to capture and decode PTM trace from Cortex A9 dual core. >>> >>> I m successful in configuring the driver(arch/arm/kernel/etm.c) and >>> setting the funnel to get data in ETB. >>> But I don't know how to decode these traces. >>> >>> Anyone has any pointers? >>> >>> Thanks, >>> Arun >> >> I attached some tools I use to decode the traces. I have used this on >> the A8, A9 and A15. I assume since you cc-ed me you have already >> applied the kernel patches I posted a while back. Without them you >> will not get useful trace data from a dual core processor. > > Thank you very much for the tools. Hope I have taken all your patches. > > Here is how my git log --oneline looks on arch/arm/kernel/etm.c > > 75cbaea ARM: etm: Add sysfs entry to enable return stack if supported > 434032a ARM: etm: Add sysfs entry to disable branch_output flag > c6b1c35 ARM: etm: Add sysfs entry to set context-id-size > cfb8dc5 ARM: etm: Add sysfs entry to enable timestamps if supported > d263bc7 ARM: etm: Check arch version and disable data tracing for ptm > eff62a8 ARM: etm: Wait for etm/ptm(s) to stop before requesting PowerDown > 4246983 ARM: etm: Power down etm(s) when tracing is not enabled > 992cd59 ARM: etm: Support multiple ETMs/PTMs. > 3a91f3e ARM: etm: Return the entire trace buffer if it is empty after reset > fe05bda ARM: etm: Add some missing locks and error checks > 0c3da53 ARM: etm: Configure data tracing > d71c695 ARM: etm: Allow range selection > f13ae47 ARM: etm: Don't try to clear the buffer full status after > reading the buffer > 8511b5b ARM: etm: Don't limit tracing to only non-secure code. > d387659 ARM: etm: Don't require clock control > 73017a5 arm: fix implicit module.h users by adding it to arch/arm as required. > 8e88069 ARM: 6838/1: etm: fix section mismatch warning > aa25afa ARM: amba: make probe() functions take const id tables > 092e0e7 Merge branch 'llseek' of > git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl > 6038f37 llseek: automatically add .llseek fop > 8234eae ARM: 6291/1: coresight: move struct tracectx inside etm driver > 1495cc9 Input: sysrq - drop tty argument from sysrq ops handlers > 988257c ARM: 6294/1: etm: do a dummy read from OSSRR during initialization > 9e354ea ARM: 6292/1: coresight: add ETM management registers > c5d6c77 ARM: 5841/1: a driver for on-chip ETM and ETB > > I ll let you know the results.
I m able to see decoded ptm traces using the following command, python3.1 etm-objdump.py --trace-decoder=./etm --trace-decoder-options="--pft-1.1 --sourceid-match 2" ptm.bin Thanks, Arun > > thanks, > Arun >> >> -- >> Arve Hjønnevåg _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
