* Gianluca Valentino ([email protected]) wrote: > > 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
Please see the Compatibility list, available from the download section of the lttng.org website: ltt-control 0.84 is compatible with LTTng 0.191 to 0.214, which means kernels 2.6.32.4 to 2.6.33.4. You are using a 2.6.31.5 tree, so I wonder which LTTng version you use. Thanks, Mathieu > > 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 > ubu...@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 > ubu...@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: [email protected] > To: [email protected] > CC: [email protected] > > 2010/5/18 Gianluca Valentino <[email protected]> > > > > > > > > > > > From: [email protected] > To: [email protected] > 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 > _______________________________________________ > ltt-dev mailing list > [email protected] > http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev -- Mathieu Desnoyers Operating System Efficiency R&D Consultant EfficiOS Inc. http://www.efficios.com _______________________________________________ ltt-dev mailing list [email protected] http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
