kernel-packages team mailing list archive

[Dmitry Rekman <1248289@xxxxxxxxxxxxxxxxxx>]

Does this problem not affect Canonical developers working on, say, Mir
(which is written in C++)?  It is way more painful to profile
applications on stock Ubuntu.

This can mean that Mir developers are not interested in performance of
their server, which I hope is a wrong conclusion to draw.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1248289

Title:
  Missing libunwind support in perf

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Hi,

  I'm trying to use perf's libunwind support in 13.04 with kernel
  3.11.0-12-generic on amd64.  Typically you can do this by using the
  "-g dwarf" flag, but it appears the perf command included in linux-
  tools-3.11.0-12-generic was not compiled with libunwind.  This may be
  as simple as the build machine didn't have libunwind installed.
  Having dwarf support in perf with default Ubuntu kernels would be very
  useful as it provides a way to get profiling information when
  -fomitframepointer is used.

  Relevant upstream code:

  https://github.com/torvalds/linux/blob/v3.11/tools/perf/Makefile#L459
  https://github.com/torvalds/linux/blob/v3.11/tools/perf/builtin-record.c#L758

  Let me know if I can provide any other information.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1248289/+subscriptions