816179 - PandaBoard: Profiling support

Status: RESOLVED FIXED

(Firefox OS Graveyard :: General, defect)

Description

[Thomas Zimmermann [:tzimmermann] [:tdz]]

The PandaBoard is one of our main test devices. We should have support for profiling.

Comment 1

[Thomas Zimmermann [:tzimmermann] [:tdz]]

The kernel is available at [1] and [2]. The user-space tools for Oprofile are available at [3]. The kernel also supports perf, but the user-space tools depend on glibc afaics.

[1] https://github.com/tdz/android-device-panda/tree/profiling
[2] https://github.com/tdz/android-kernel-omap/tree/profiling
[3] https://github.com/tdz/platform_external_oprofile

Comment 2

[Thomas Zimmermann [:tzimmermann] [:tdz]]

Hi Michael,

I added support for Oprofile on the PandaBoard. The work is almost done, but I wanted to have your opinion/comments/objects/etc before I send any pull requests.

Comment 3

[Michael Wu [:mwu]]

The kernel side changes look fine.

Which branch/tag did you pull the oprofile fork from?

Comment 4

[Thomas Zimmermann [:tzimmermann] [:tdz]]

It's android-4.0.4_r2.1 from git://codeaurora.org/platform/external/oprofile.

Comment 5

[Michael Wu [:mwu]]

It looks like we can pick up the libpp fix by using ics_plus_aosp.

The python script is a host side thing so I think we can just make a copy of it instead of forking the whole tree for the fix.

Comment 6

[Thomas Zimmermann [:tzimmermann] [:tdz]]

I had problems compiling ics-plus-aosp from the Linaro repo because bfd.h was missing. The similar branch aosp-new/ics-plus-aosp from the Codeaurora repo seems to work.

Where would the modified script be located?

Comment 7

[Thomas Zimmermann [:tzimmermann] [:tdz]]

Attachment: support for oprofile on K3.0

Comment 8

[Thomas Zimmermann [:tzimmermann] [:tdz]]

Attachment: Enable profiling support

Kernel patches for the PandaBoard

Comment 9

[Thomas Zimmermann [:tzimmermann] [:tdz]]

This patch has been in master for a month without any reported regressions.