From mboxrd@z Thu Jan 1 00:00:00 1970 From: tracemein@gmail.com (Naren) Date: Wed, 10 Feb 2010 23:08:21 +0100 Subject: [ltt-dev] UST - Problems in recording trace on a current process In-Reply-To: <201002101515.49624.pierre-marc.fournier@polymtl.ca> References: <19fa8ef31002081349v36a13174m1a031048048fd45c@mail.gmail.com> <4B72D009.2060702@polymtl.ca> <19fa8ef31002100853n189221f3u3015c85afc65db5c@mail.gmail.com> <201002101515.49624.pierre-marc.fournier@polymtl.ca> Message-ID: <19fa8ef31002101408l3b5eb66bnc062c2785910d63e@mail.gmail.com> Hi Pierre >>I just commited a quick and dirty fix for this issue. A refactoring of the ust >>communication lib is in progress to address this more elegantly. Everything is working fine.Finally. With the default markers,I am getting a trace but in LTTV, i could only see the 6 events that was captured, hence not getting anything in control flow viewer. I presume, lot many instrumentations have to be added by me before i get to see any substantial trace results. Thanks a lot for you help. However, i made few observations 1. In the terminal window, where i gave LD_PRELOAD, i am getting this error after destroying the trace and closing the traced program *root at naren-laptop:/usr/src# LD_PRELOAD=/usr/local/lib/libust.so.0.0.0 /usr/bin/gimp* *libust[9868/9869]: Error: cannot find trace! (in do_cmd_put_subbuffer() at tracectl.c:632)* *libust[9868/9869]: Error: cannot find trace! (in do_cmd_put_subbuffer() at tracectl.c:632)* * * 2. In the terminal window where ustd demon is running, i am getting the following errors *ustd[9447/9820]: Error: Buffer overflow (channel=metadata_0), reader pushed. This channel will not be usable passed this point. (in consumer_loop() at ustd.c:399)* *ustd[9447/9881]: Error: unable to parse response to put_subbuffer (in put_subbuffer() at ustd.c:141)* *ustd[9447/9881]: Error: unknown error putting subbuffer (channel=ust_0) (in consumer_loop() at ustd.c:395)* *ustd[9447/9880]: Error: Buffer overflow (channel=metadata_0), reader pushed. This channel will not be usable passed this point. (in consumer_loop() at ustd.c:399)* * * Buffer over error, is it due to the fact that trace is being recorded in flight recorder mode? Regards Naren -------------- next part -------------- An HTML attachment was scrubbed... URL: From mboxrd@z Thu Jan 1 00:00:00 1970 From: tracemein@gmail.com (Naren) Date: Wed, 10 Feb 2010 23:08:21 +0100 Subject: [ltt-dev] UST - Problems in recording trace on a current process In-Reply-To: <201002101515.49624.pierre-marc.fournier@polymtl.ca> References: <19fa8ef31002081349v36a13174m1a031048048fd45c@mail.gmail.com> <4B72D009.2060702@polymtl.ca> <19fa8ef31002100853n189221f3u3015c85afc65db5c@mail.gmail.com> <201002101515.49624.pierre-marc.fournier@polymtl.ca> Message-ID: <19fa8ef31002101408l3b5eb66bnc062c2785910d63e@mail.gmail.com> Message-ID: <20100210220821.-GQHQwk2lwWWq5jBA6wueAm6M3rFGLQ9wpWjfyIThis@z> Hi Pierre >>I just commited a quick and dirty fix for this issue. A refactoring of the ust >>communication lib is in progress to address this more elegantly. Everything is working fine.Finally. With the default markers,I am getting a trace but in LTTV, i could only see the 6 events that was captured, hence not getting anything in control flow viewer. I presume, lot many instrumentations have to be added by me before i get to see any substantial trace results. Thanks a lot for you help. However, i made few observations 1. In the terminal window, where i gave LD_PRELOAD, i am getting this error after destroying the trace and closing the traced program *root at naren-laptop:/usr/src# LD_PRELOAD=/usr/local/lib/libust.so.0.0.0 /usr/bin/gimp* *libust[9868/9869]: Error: cannot find trace! (in do_cmd_put_subbuffer() at tracectl.c:632)* *libust[9868/9869]: Error: cannot find trace! (in do_cmd_put_subbuffer() at tracectl.c:632)* * * 2. In the terminal window where ustd demon is running, i am getting the following errors *ustd[9447/9820]: Error: Buffer overflow (channel=metadata_0), reader pushed. This channel will not be usable passed this point. (in consumer_loop() at ustd.c:399)* *ustd[9447/9881]: Error: unable to parse response to put_subbuffer (in put_subbuffer() at ustd.c:141)* *ustd[9447/9881]: Error: unknown error putting subbuffer (channel=ust_0) (in consumer_loop() at ustd.c:395)* *ustd[9447/9880]: Error: Buffer overflow (channel=metadata_0), reader pushed. This channel will not be usable passed this point. (in consumer_loop() at ustd.c:399)* * * Buffer over error, is it due to the fact that trace is being recorded in flight recorder mode? Regards Naren -------------- next part -------------- An HTML attachment was scrubbed... URL: