[ltt-dev] lttv core

[Andy Howell]

Pierre-Marc Fournier wrote:
> Andy Howell wrote:
>> Hello,
>>
>>     I have a trace that is causing problems. The gui comes up ok, but
>> when I zoom in, it dies with:
>>
>> ** (lttv.real:32675): CRITICAL **: unknown state : (null)
>> **
>> ** ERROR:(eventhooks.c:273):prepare_s_e_line: assertion failed: (FALSE)
>>
> 
> Are there lost events in the trace? This is seen in dmesg after
> recording it or in the lttv console output.
> 

Pierre-Marc,

	Yes, dmesg shows:

LTT state dump thread start
LTT state dump end
LTT : fs : 84072 events lost in fs channel (cpu 1).
LTT : fs : 660398 events lost in fs channel (cpu 0).
LTT : vm_state : 8264 events lost in vm_state channel (cpu 1).

I didn't notice the fs ones before. I'm looking at performance issues in my code, so the 
machine is maxed out.

I made a copy of the trace and removed the fs files. I can zoom in and out with no 
problems now.

I do see a bunch of warnings, which I assume are harmless:

** (lttv.real:9974): WARNING **: Cannot find pin_in in schedchange 27677

** (lttv.real:9974): WARNING **: No channel for marker named block._blk_request_complete found
** (lttv.real:9974): WARNING **: No channel for marker named block._blk_request_issue found
** (lttv.real:9974): WARNING **: No channel for marker named fs.exec found
** (lttv.real:9974): WARNING **: No channel for marker named kprobe_state.kprobe_table found
** (lttv.real:9974): WARNING **: No channel for marker named userspace.function_entry found
** (lttv.real:9974): WARNING **: No channel for marker named userspace.function_exit found
** (lttv.real:9974): WARNING **: No channel for marker named userspace.thread_brand found



Thanks,

	Andy