Re: Clarification on support of arm32 with kernel4.1 for oprofile 1.2.0

Hello Michael,

Thanks so much for the help.

Cross compiled the hello.c with crosstools-arm-gcc-5.3-linux-4.1-glibc-2.22
and tested the executable on the target(arm32)

Received the following error
" ./hello
Error opening leader 1"


Following are the kernel configs related to PERF in target

 cat /tmp/test |grep PERF

CONFIG_HAVE_PERF_EVENTS=y
CONFIG_PERF_USE_VMALLOC=y
CONFIG_PERF_EVENTS=y
# CONFIG_DEBUG_PERF_USE_VMALLOC is not set
CONFIG_HAVE_PERF_REGS=y
CONFIG_HAVE_PERF_USER_STACK_DUMP=y
# CONFIG_PCIEASPM_PERFORMANCE is not set
# CONFIG_HW_PERF_EVENTS is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
# CONFIG_CPU_FREQ_GOV_PERFORMANCE is not set
# CONFIG_CLS_U32_PERF is not set

Could you please share your feedback on this.

Thanks in Advance!!!

Thanks and Regards,
Vinoth Natarajan.


On Wed, Feb 14, 2018 at 11:01 PM, Michael Petlan <[email protected]> wrote:

> On Tue, 13 Feb 2018, Vinoth Natarajan wrote:
> > Hello Team,
> > Good Day!!!
> >
> > Cross Compiled the oprofile-1.2.0 in ubuntu.
>
> Hi, it's nice to see that you finally managed to compile it.
>
> [...]
> >
> > once compiled,tested the oprofile binaries in target (arm32 hw running
> on kernel-4.1)
> > Received the following error
> >
> > # operf
> > Your kernel does not implement a required syscall for the operf program.
> >
> > While checking found that CONFIG_PERF_EVENTS is not set, So enabled the
> same and tested the orpfile resulted the following error.
> >
> >
> > # operf --help
> > Your kernel's Performance Events Subsystem does not support your
> processor type.
> >
> >
> > if i change the oprofile-1.2.0 with oprofile 0.9.9 it works fine
> (oprofile running in legacy mode)
> >
> > Can anyone let me understand why oprofile-1.2.0 give " Your kernel's
> Performance Events Subsystem does not support your processor type. " error.
>
> I would first try to figure out whether the kernel subsystem works or not.
> Try to compile the attached hello.c and run it there. You need kernel-devel
> and headers.
>
> $ cc -o hello hello.c
> $ ./hello
> Measuring instruction count for this printf
> Used 3259 instructions
>
> Does this work for you?
> If yes, it's oprofile who has a problem, but it is pretty probable, that
> the problem lies in kernel backend.
>
> Cheers,
> Michael
>
> >
> > Is arm32 not supported in  oprofile-1.2.0  with kernel -4.1?
> >
> > Please explain this !!!
> >
> > Thanks in Advance..
> >
> > Thanks and Regards,
> > Vinoth Natarajan.
> >
> >
>

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