[ltt-dev] LTTng on OMAP3530

[Mathieu Desnoyers]

* bastelg at aim.com (bastelg at aim.com) wrote:
> Hello,
> 
> I'd like to use LTTng for some performance measurements on an OMAP3530
> platform. I've read that this platform is supported and tried to get a
> suitable kernel patched during the last few days - without success.
> Using a mainline kernel (2.6.30) with standard lttng patches results
> in many missing drivers (for example sd-card-support). Patching a
> kernel of the OMAP-kernel tree (2.6.30-omap1) with standard lttng
> patches doesn't seem to possible as well (patching fails). I also
> tried to use the lttng kernel tree from
> git://lttng.org/linux-omap-pm-2.6-lttng.git (branch
> 2.6.32-rc8-omap-pm-omap-pm-lttng-0.183o). Compiling the kernel leads
> to a linker error:
> ...
> LD vmlinux
> drivers/built-in.o : (__tracepoints+0x0) : multiple definition of '__tracepoints_power_end'
> kernel/built-in.o : (__tracepoints+0x800) : first defined here
> 
> So at at the moment I've no idea how I can get this to run. Is there a
> chance to patch a 2.6.31-omap1 or 2.6.32-omap1 kernel with lttng? Or
> does the lttng-OMAP-kernel-tree provide the needed OMAP drivers and
> does anybody know something about the linker error?

The right kernel to use is the one available here:

git://lttng.org/linux-omap-pm-2.6-lttng.git

What is the topmost commit in your working branch ? Make sure you are at
least on branch

2.6.32-rc8-omap-pm-omap-pm-lttng-0.185o

Mathieu


> 
> Thanks in advance,
> 
> Sebastian Geissler
> 

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-- 
Mathieu Desnoyers
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