[ltt-dev] "Kernel/LTTV event size differs for event udpv4_rcv_extended: kernel 32, LTTV 28" error when view trace

[Benjamin Poirier]

On 05/11/10 02:24 AM, xufeng zhang wrote:
> Hi,
> I'm using ltt-control-0.86 and lttv-0.12.31 on ARM to trace the kernel,
> however,

Hello,

Which version of the kernel tracer patches are you using?

-Ben

> I cannot view the trace after I have successfully generated, here is the
> error
> when I run 'lttv-gui -t trace1' command:
> ** Message: statistics viewer : background computation data ready.
> 
> ** (lttv.real:6559): WARNING **: Cannot find pin_in in schedchange 671
> 
> ** ERROR **: Kernel/LTTV event size differs for event
> udpv4_rcv_extended: kernel 32, LTTV 28
> aborting...
> /usr/local/bin/lttv-gui: line 10:  6559 Aborted                
> $LTTV_CMD.real -m lttvwindow -m guievents -m guifilter -m guicontrolflow
> -m resourceview -m guistat
> 
> 
> And I found another people met the same problem on MIPS32, a patch have
> also been provided for MIPS32.
> Here is the similar code in ARM trace-clock.c:
> linux/arch/arm/mach-omap2/trace-clock.c line 537
> void get_trace_clock(void)
> {
>         spin_lock(&trace_clock_lock);
>         if (trace_clock_refcount++)
>                 goto end;
>         _start_trace_clock();
> end:
>         spin_unlock(&trace_clock_lock);
> }
> EXPORT_SYMBOL_GPL(get_trace_clock);
> 
> void put_trace_clock(void)
> {
>         spin_lock(&trace_clock_lock);
>         WARN_ON(trace_clock_refcount <= 0);
>         if (trace_clock_refcount != 1)
>                 goto end;
>         _stop_trace_clock();
> end:
>         trace_clock_refcount--;
>         spin_unlock(&trace_clock_lock);
> }
> EXPORT_SYMBOL_GPL(put_trace_clock);
> 
> Could anybody figure out what's wrong with the kernel code? Any
> suggestion would be appreciated.
> 
> 
> Thanks,
> Xufeng Zhang
> 
> 
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