* Arnaldo Carvalho de Melo <a...@kernel.org> wrote:
> Hi Ingo,
>
> Please consider pulling,
>
> - Arnaldo
>
> Test results at the end of this message, as usual.
>
> The following changes since commit 63f700aab4c11d46626de3cd051dae56cf7e9056:
>
> Merge tag 'xtensa-20170612' of git://github.com/jcmvbkbc/linux-xtensa
> (2017-06-13 15:09:10 +0900)
>
> are available in the git repository at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git
> tags/perf-urgent-for-mingo-4.12-20170616
>
> for you to fetch changes up to 9126cbbacecb8917bd0418809ef1d26616b2061e:
>
> perf unwind: Report module before querying isactivation in dwfl unwind
> (2017-06-16 14:37:30 -0300)
>
> ----------------------------------------------------------------
> perf/urgent fixes:
>
> - Fix probing of precise_ip level for default cycles event, that
> got broken recently on x86_64 when its arch code started
> considering invalid requesting precise samples when not sampling
> (i.e. when attr.sample_period == 0).
>
> This also fixes another problem in s/390 where the precision
> probing with sample_period == 0 returned precise_ip > 0, that
> then, when setting up the real cycles event (not probing) would
> return EOPNOTSUPP for precise_ip > 0 (as determined previously
> by probing) and sample_period > 0.
>
> These problems resulted in attr_precise not being set to the
> highest precision available on x86.64 when no event was specified,
> i.e. the canonical:
>
> perf record ./workload
>
> would end up using attr.precise_ip = 0. As a workaround this would
> need to be done:
>
> perf record -e cycles:P ./workload
>
> And on s/390 it would plain not work, requiring using:
>
> perf record -e cycles ./workload
>
> as a workaround. (Arnaldo Carvalho de Melo)
>
> - Fix perf build with ARCH=x86_64, when ARCH should be transformed
> into ARCH=x86, just like with the main kernel Makefile and
> tools/objtool's, i.e. use SRCARCH. (Jiada Wang)
>
> - Avoid accessing uninitialized data structures when unwinding with
> elfutils's libdw, making it more closely mimic libunwind's unwinder.
> (Milian Wolff)
>
> Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
>
> ----------------------------------------------------------------
> Arnaldo Carvalho de Melo (1):
> perf evsel: Fix probing of precise_ip level for default cycles event
>
> Jiada Wang (1):
> perf tools: Fix build with ARCH=x86_64
>
> Milian Wolff (1):
> perf unwind: Report module before querying isactivation in dwfl unwind
>
> tools/perf/Makefile.config | 38 +++++++++++++++++++-------------------
> tools/perf/Makefile.perf | 2 +-
> tools/perf/arch/Build | 2 +-
> tools/perf/pmu-events/Build | 4 ++--
> tools/perf/tests/Build | 2 +-
> tools/perf/tests/task-exit.c | 2 +-
> tools/perf/util/evsel.c | 12 ++++++++++++
> tools/perf/util/header.c | 2 +-
> tools/perf/util/unwind-libdw.c | 8 ++++++++
> 9 files changed, 46 insertions(+), 26 deletions(-)
Pulled, thanks a lot Arnaldo!
Ingo
