Re: Fwd: [PATCH 0/3] perf tools: Add libdw DWARF post unwind support for ARM64

[Mark Wielaard <mjw at redhat dot com>]

On Fri, 2014-03-21 at 15:55 +0100, Jean Pihet wrote:
> > If you can run make check on the rebased branch on your setup that would
> > be helpful. Ideally all tests PASS. If not, the output of
> > tests/test-suite.log would be interesting.
> The tests are running since a while now (>12hours!) and it seems that
> the backtrace test is taking ages to complete.

I am pretty sure you can just kill that test executable and assume it is
broken. make check should take seconds, not minutes (unless ran under
valgrind) or hours.

> But not the compat mode (stress_bt_v7_static is a statically built
> ARMv7 binary):
> 
> # Overhead          Command        Shared Object
> # ........  ...............  ...................  ..............................
> #
>     98.02%  stress_bt_v7_st  stress_bt_v7_static  [.] foo_128
> 
>      0.25%  stress_bt_v7_st  [vectors]            [.] 0x00000000ffff0fc0
> 
>      0.13%  stress_bt_v7_st  [kernel.kallsyms]    [k] put_nfs_open_context
>             |
>             --- put_nfs_open_context
>                 nfs_free_request
>                 nfs_release_request
> ...

Does it work OK on a native ARMv7 kernel? Does eu-stack -p work OK on
it? Could you post the source & binary somewhere for inspection?

Thanks,

Mark