[ltt-dev] No trace data inside the trace folders

[Mathieu Desnoyers]

what is the "the same /root/.usttracers/..../ust-consumerd.log - No such
file or directory" exactly ? Which path is it unable to create ? Have
you tried creating it by hand ?

Thanks,

Mathieu

* Srivatsan Vijayaraghavan (srivatsanvijayaraghavan at yahoo.com) wrote:
> -sh-2.05b# usttrace -o ./tracedir ./testUST
> ./tracedir
> Waiting for ust-consumerd to shutdown...
> Trace was output in:  ./tracedir
> -sh-2.05b# pwd
> /usr/local/bin
> -sh-2.05b# cd tracedir
> -sh-2.05b# ls
> app.log            ust-consumerd.log
> 
> If I dont give the trace directory, the it fails to create the ust-consumerd.log file.
> 
> Thanks,
> Srivatsan
> --- On Tue, 2/15/11, Mathieu Desnoyers <compudj at krystal.dyndns.org> wrote:
> 
> From: Mathieu Desnoyers <compudj at krystal.dyndns.org>
> Subject: Re: [ltt-dev] Trouble tracing my application for PowerPC board
> To: "Srivatsan Vijayaraghavan" <srivatsanvijayaraghavan at yahoo.com>
> Cc:
>  ltt-dev at lists.casi.polymtl.ca
> Date: Tuesday, February 15, 2011, 4:34 AM
> 
> * Srivatsan Vijayaraghavan (srivatsanvijayaraghavan at yahoo.com) wrote:
> > I used ltib to cross compile and build liburcu and libust on my target board (for powerpc). Everything went smooth with few glitches which were sorted out, but when I tried to trace my application by invoking it from usttrace (usttrace ./testust), I wasn't able to get beyond this message
> >     /root/.usttracers/...../ust-consumerd.log - No such file or directory
> > 
> > I tried recording the trace manually when ust-consumerd failed in epoll_create().
> > So I built the kernel with CONFIG_EPOLL support, but that did not help. I still get the same /root/.usttracers/..../ust-consumerd.log - No such file or directory 
> >
>  
> > ---testust.cpp---
> > #include <ust.marker.h>
> > int main(..)
> > {
> >    trace_mark(main,myevent,"%d", getpid());
> > }
> 
> which user ID are your running your application as ?
> 
> What's the value of your $HOME ?
> 
> It looks like ust is unable to create the directories/files needed to
> write the log file. It looks like an access right problem
> 
> Mathieu
> 
> > 
> > Thanks,
> > Srivatsan V
> > 
> > 
> > 
> > 
> >  
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> 
> 
> -- 
> Mathieu Desnoyers
> Operating System Efficiency R&D Consultant
> EfficiOS Inc.
> http://www.efficios.com
> 
> 
> 
>  
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-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com