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

[srivatsanvijayaraghavan@yahoo.com (Srivatsan Vijayaraghavan)]

I am very sorry to have misled all of you. I used the ellipsis to mean some path name and my host name and date string are indeed fine. It's really the trace folder which is missing even when I specify it explicitly using the -o option, it stops after creating app.log and ust-consumerd.log, there is no trace folder inside my trace directory.

pwd - /usr/local/bin
usttrace -o /usr/local/bin/traceapp ./testust
- Waiting for ust-consumerd to shutdown...
- Trace was output in /usr/local/bin/traceapp

Then i went to inspect the trace output only to find app.log and ust-consumerd.log inside /usr/local/bin/traceapp. 

ls /usr/local/bin/traceap showed me only app.log and ust-consumerd.log

Thanks,
Srivatsan V

--- On Tue, 2/15/11, Mathieu Desnoyers <compudj at krystal.dyndns.org> wrote:

From: Mathieu Desnoyers <compudj@krystal.dyndns.org>
Subject: Re: [ltt-dev] No trace data inside the trace folders
To: "Srivatsan Vijayaraghavan" <srivatsanvijayaraghavan at yahoo.com>
Cc: ltt-dev at lists.casi.polymtl.ca
Date: Tuesday, February 15, 2011, 7:06 PM

* Srivatsan Vijayaraghavan (srivatsanvijayaraghavan at yahoo.com) wrote:
> case 1 - usttrace ./testust 
> no -o option switch to specify trace directory and I get 
> /root/.usttracers/.../ust-consumerd.log - No such file or directory

Ah, "..." is the problem. It's not a valid path name.

The following usttrace code seems problemstic on your system:

# Create directory for trace output
if [ -n "$OUTPUT_DIR" ]; then
? ? ? ? OUTDIR=$OUTPUT_DIR
else
? ? ? ? DATESTRING="$(hostname)-$(date +%Y%m%d%H%M%S%N)"
? ? ? ? OUTDIR="$BASE_TRACE_DIR/$DATESTRING"
fi

So your commands "hostname" and "date" are missing.

Mathieu

> 
> case 2 - usttrace -o ./trace ./testust 
> I specified the output directory for the trace and the two files app.log, ust-consumerd.log are now created in ./tracedir, but when I tried to inspect the folder for the actual trace, there was no tracing done or the folder where the trace data is kept was not there inside ./tracedir
> 
> On the console- ?? 
> ?????? > Waiting for ust-consumerd to shutdown...
> ?????? > Trace was output in:? ./tracedir
> ???? sh-2.05b# cd tracedir
> ??? -sh-2.05b# ls
> ?????? > app.log??????????? ust-consumerd.log
> 
> Thanks,
> Srivatsan
> --- On Tue, 2/15/11, Mathieu Desnoyers <compudj at krystal.dyndns.org> wrote:
> 
> From: Mathieu Desnoyers <compudj@krystal.dyndns.org>
> Subject: Re: [ltt-dev] No trace data inside the trace folders
> To: "Srivatsan Vijayaraghavan" <srivatsanvijayaraghavan at yahoo.com>
> Cc: ltt-dev at lists.casi.polymtl.ca
> Date: Tuesday, February 15, 2011, 2:00 PM
> 
> 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@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
> 
> 
> 
>? 
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-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com



 
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