RE: [PATCH] Fix for cross-compile error of oprofile 0.9.4 RC

[Donak, J. <jd...@ci...>]

My initial scenario is that I am running opreport on the target - but
setting session-dir to a location on my nfs mount (where the samples are
stored).

The reason for the error below is that some of the sample files are
filled with 0s - hence the bad magic! This seems to be random as to
which point the failure occurs. i.e. sometimes it is the TIMER.0.0.0.0.0
file, sometimes it is later on in the sequence (sample files Ok up until
a point, and then all subsequent files are 0s).

I do NOT see this problem if the samples are stored on the target. Since
nfs is supposed to be transparent, I am confused. Something to do with
the daemon?


My second scenario is where the samples are stored on the nfs mount, but
opreport is run on the host. This is my main goal. This has the same
problem as above.


My third scenario is that the samples are stored on the target and moved
to the host, which then runs opreport. Using the conversion script
below, this works! Thanks, Richard.

Unfortunately, my target does not have lots of memory - hence the need
for scenario two to work.

JD

-----Original Message-----
From: Richard Purdie [mailto:rp...@rp...] 
Sent: Thursday, July 03, 2008 9:27 AM
To: Donak, John
Cc: Maynard Johnson; opr...@li...
Subject: RE: [PATCH] Fix for cross-compile error of oprofile 0.9.4 RC

On Thu, 2008-07-03 at 09:00 -0400, Donak, John wrote:
>  Yes, I have. Thanks.
> 
>  I am able to run oprofile RC2 on my target, but still have a problem
> with using opreport on samples stored on an nfs mount (since local
> storage on my embedded system is limited).
> 
> opreport error: Invalid sample file, bad magic
>
number:/oprofile/samples/current/{kern}/no-vmlinux/{dep}/{kern}/no-vmlin
> ux/TIMER.0.0.0.0.0
> 
> I am investigating...

You may need to convert the sample files using opimport. OprofileUI uses
the the script at
http://svn.o-hand.com/view/oprofileui/trunk/scripts/oparchconv?rev=159&v
iew=markup
to do this.

Regards,

Richard