[ltt-dev] no metadata tracefile

[Ji.Zhai@ca.flextronics.com (Ji Zhai)]

Hi All,

 

Could you please give me any suggestions or hints?

Thanks in advance!

 

Ji

 

________________________________

From: Ji Zhai [mailto:Ji.Zhai@ca.flextronics.com] 
Sent: Wednesday, August 31, 2011 4:47 PM
To: ltt-dev at lists.casi.polymtl.ca
Subject: [ltt-dev] no metadata tracefile

 

Hi All,

 

As the restriction of the hardware and development environment, I am
trying to use UST as the following combination:

1. PowerPC 44x platform

2. Linux kernel 2.6.31.12

3. LTTng v0.170

4. userspace RCU 0.4.6

5. UST 0.6

6. LTTV 0.12.20

 

I can get the kernel traces and use LTTV 0.12.20 to review them.

However, when I use the sample code from the "Section 3 Quick Start" of
UST manual,

 
#include <ust/marker.h>
     
     int main(int argc <http://en.wikipedia.org/wiki/Main_function> ,
char **argv)
     {
        int v;
        char *st;
     
        /* ... set values of v and st ... */
     
        /* a marker: */
        trace_mark(ust, myevent, "firstarg %d secondarg %s", v, st);
     
        /* a marker without arguments: */
        trace_mark(ust, myotherevent, MARK_NOARGS);
     
        return 0;
     }

 

I got the errors by using LTTV 0.12.20:

 

** (process:18957): WARNING **: Unsupported trace version : 2.6

 

** (process:18957): WARNING **: parse_trace_header error

 

** (process:18957): WARNING **: Unsupported trace version : 2.6

 

** (process:18957): WARNING **: parse_trace_header error

 

** (process:18957): WARNING **: Trace
/nas/LTTng/mytrace/24407_5647013710766707006 has no metadata tracefile

 

** (process:18957): CRITICAL **: cannot open trace .

/usr/local/bin/lttv: line 15: 18957 Segmentation fault      $0.real $*

 

From the mailing list, some guys said to use LTTV 0.12.30 or higher may
solve this problem.

 

After run LTTV 0.12.32, I got:

 

** ERROR **: Undescribed event 0 in channel ust

aborting...

/home/LTTng/bin/lttv: line 15: 19600 Aborted                 $0.real $*

 

So, I doubt that I may miss some key steps to configure the kernel for
powerpc. The "UST" does not create the trace for me.

I'd like to get your suggestions. Thanks in advance!

 

Regards,

 

Ji

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