From mboxrd@z Thu Jan 1 00:00:00 1970 From: g_v_valentino@hotmail.com (Gianluca Valentino) Date: Tue, 18 May 2010 16:52:01 +0200 Subject: [ltt-dev] Problems with LTTV GUI In-Reply-To: References: , , , Message-ID: Message-ID: <20100518145201.T3kcpf16IzQBzNNUaR-TyLpkvMq3uERECK_zUhvEvMs@z> Dear Jerome, I think I have destroyed it correctly, at least that's what it says when I run it in text-mode (see no. 8 below).. I will explain each step that I have done after booting with the LTTng patched kernel below: 1. Edit system-wide configuration (as explained in the guide: http://lttng.org/cgi-bin/gitweb.cgi?p=lttv.git;a=blob_plain;f=LTTngManual.html#section2) mkdir /mnt/debugfs cp /etc/fstab /etc/fstab.lttng.bkp echo "debugfs /mnt/debugfs debugfs rw 0 0" >> /etc/fstab 2. Insert the specific modules (every time I boot) modprobe kernel-trace modprobe mm-trace modprobe net-trace modprobe fs-trace modprobe jbd2-trace modprobe ext4-trace modprobe syscall-trace modprobe trap-trace modprobe ltt-statedump I couldn't do modprobe ltt-trace-control modprobe ltt-marker-control modprobe ltt-tracer modprobe ltt-serialize modprobe ltt-relay However these should be in-built as they appear as .o and .c files in /lib/modules/2.6.31.5-custom/build/ltt 3. I installed the ltt-control and lttv packages as explained in the guide above 4. echo text > sudo tee -a /mnt/debugfs/ltt/write_event does not give me any error 5. I execute sudo ltt-armall, and sudo lttv-gui 6. I click on the 'traffic light' icon and I enter the root password. I click on start and then stop. LTTng Trace Control asks me if I want to open the trace in LTTV. I click yes, and it tells me "Cannot open trace: maybe you should enter in the directory to select it". Checking the sizes of the files in /tmp/trace1 (as you asked me) are all zero-sized. 7. With the CLI version of lttv: I execute sudo lttctl -C -w /tmp/trace1 trace1. It gives me: Linux Trace Toolkit Trace Control 0.84-07042010 Controlling trace : trace1 lttctl: Creating trace lttctl: Forking lttd Linux Trace Toolkit Trace Daemon 0.84-07042010 Reading from debugfs directory : /sys/kernel/debug/ltt/trace1 Writing to trace directory : /tmp/trace1 lttctl: Starting trace ubuntu at beagleboard:~$ 8. Then I execute sudo lttctl -D trace1 to destroy trace. It gives me: Linux Trace Toolkit Trace Control 0.84-07042010 Controlling trace : trace1 lttctl: Pausing trace lttctl: Destroying trace ubuntu at beagleboard:~$ 9. The only error I encountered was when I tried lttv -m textDump -t /tmp/trace1 for a simple trace dump in text format. After a series of long lines like: The input data file /tmp/trace1/net_0 does not contain a trace it told me WARNING **: Trace /tmp/trace1 has no metadata tracefile and CRITICAL **: cannot open trace /tmp/trace1 and finally: /usr/local/bin/lttv: line 15: 2152 Segmentation fault $0.real $* Date: Tue, 18 May 2010 21:27:20 +0800 Subject: Re: [ltt-dev] Problems with LTTV GUI From: jeromezhr@gmail.com To: g_v_valentino at hotmail.com CC: ltt-dev at lists.casi.polymtl.ca 2010/5/18 Gianluca Valentino From: g_v_valentino@hotmail.com To: jeromezhr at gmail.com Subject: RE: [ltt-dev] Problems with LTTV GUI Date: Tue, 18 May 2010 15:18:16 +0200 Dear Jerome, Thanks for your reply. Yes they are all zero-sized.. Regards, Gianluca So I think there must be some problems in traceing. Have you destroyed your trace correctly? -- Regards, Jerome _________________________________________________________________ Your E-mail and More On-the-Go. Get Windows Live Hotmail Free. https://signup.live.com/signup.aspx?id=60969 -------------- next part -------------- An HTML attachment was scrubbed... URL: