Hi Srivatsan,
If usttrace give you no trace directory it's because their was no data
recorded by the tracer. It's like tracing an application that does not
contain UST instrumentation. For example :
$ usttrace ls
will output only app.log and ust-consumerd.log and no data.
However, I saw that you are using a very simple test case :
#include <ust/marker.h>
int main(int argc, char **argv)
{
trace_mark(main,myevent,"%d", getpid());
}
This should actually work fine with the latest UST release (0.11).
However, using the channel "main" will not produce data for you. At this
point, only the channel "ust" is supported.
If you still don't get the directory containing data, maybe try the
latest git head of UST.
Thanks!
David
On 11-02-15 03:06 PM, Srivatsan Vijayaraghavan wrote:
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 /<[email protected]>/*
wrote:
From: Mathieu Desnoyers <[email protected]>
Subject: Re: [ltt-dev] No trace data inside the trace folders
To: "Srivatsan Vijayaraghavan" <[email protected]>
Cc: [email protected]
Date: Tuesday, February 15, 2011, 7:06 PM
* Srivatsan Vijayaraghavan ([email protected]
</mc/[email protected]>) 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
<[email protected]
</mc/[email protected]>> wrote:
>
> From: Mathieu Desnoyers <[email protected]
</mc/[email protected]>>
> Subject: Re: [ltt-dev] No trace data inside the trace folders
> To: "Srivatsan Vijayaraghavan" <[email protected]
</mc/[email protected]>>
> Cc: [email protected]
</mc/[email protected]>
> 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 ([email protected]
</mc/[email protected]>) 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
<[email protected]
</mc/[email protected]>> wrote:
> >
> > From: Mathieu Desnoyers <[email protected]
</mc/[email protected]>>
> > Subject: Re: [ltt-dev] Trouble tracing my application for
PowerPC board
> > To: "Srivatsan Vijayaraghavan"
<[email protected]
</mc/[email protected]>>
> > Cc:
> > [email protected]
</mc/[email protected]>
> > Date: Tuesday, February 15, 2011, 4:34 AM
> >
> > * Srivatsan Vijayaraghavan ([email protected]
</mc/[email protected]>) 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
> > >
> > >
> > >
> > >
> > >
> > >
____________________________________________________________________________________
> > > Food fight? Enjoy some healthy debate
> > > in the Yahoo! Answers Food & Drink Q&A.
> > > http://answers.yahoo.com/dir/?link=list&sid=396545367
<http://answers.yahoo.com/dir/?link=list&sid=396545367>
> > > _______________________________________________
> > > ltt-dev mailing list
> > > [email protected]
</mc/[email protected]>
> > > http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
> >
> >
> > --
> > Mathieu Desnoyers
> > Operating System Efficiency R&D Consultant
> > EfficiOS Inc.
> > http://www.efficios.com
> >
> >
> >
> >
> >
____________________________________________________________________________________
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> > http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
>
>
> --
> Mathieu Desnoyers
> Operating System Efficiency R&D Consultant
> EfficiOS Inc.
> http://www.efficios.com
>
>
>
>
>
____________________________________________________________________________________
> Get your own web address.
> Have a HUGE year through Yahoo! Small Business.
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--
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
------------------------------------------------------------------------
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