From mboxrd@z Thu Jan  1 00:00:00 1970
From: srivatsanvijayaraghavan@yahoo.com (Srivatsan Vijayaraghavan)
Date: Mon, 14 Feb 2011 22:09:17 -0800 (PST)
Subject: [ltt-dev] No trace data inside the trace folders
Message-ID: <354812.47298.qm@web113115.mail.gq1.yahoo.com>
Message-ID: <20110215060917.Gf6dUwwG-DwRAbnDpWRDQdXy-KHR3o7nrbahWi3ufFM@z>

-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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