Bug #945
openRunning cyclictest with lttng
0%
Description
This may be a user issue, but I spent most of sunday trying to get this to work.
Computer:
Intel core2 duo 5200 + 2 gb ram.
Distro: Ubuntu 14.04 lts (64 bit)
kernel 3.16
I've tried getting it to work with Ubuntu's default 2.4 kernel modules. I ended up with a black screen.
I've tried with the stable ppa version, it generates empty traces.
I've tried with the nightly ppa, it says "kernel abi is 2.0, expected 1.*"
I've tried from git head, I get a black screen, approximatively seconds later I see a call stack with "error cpu froze for 20 seconds"
Cyclical test location:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/clrkwllms/rt-tests.git
Here is the script I ran
#/bin/bash
lttng create cyctest-1-core
lttng enable-event -a -k
lttng start
sudo ./cyclictest -a 1 -l 1000
lttng stop
lttng destroy
lttng create cyctest-2-core
lttng enable-event -a -k
lttng start
sudo ./cyclictest -l 1000
lttng stop
lttng destroy
Updated by Jérémie Galarneau over 8 years ago
- Status changed from New to Feedback
LTTng 2.4 has been unsupported for a while. Does it happen with LTTng 2.7.0?
Updated by Matthew Khouzam over 8 years ago
Jérémie Galarneau wrote:
LTTng 2.4 has been unsupported for a while. Does it happen with LTTng 2.7.0?
2.7.0 works. The ppas do not, nor does head(s).
Updated by Matthew Khouzam over 8 years ago
It is possible that the problem is therefore with the packaging of LTTng in Ubuntu. Even though 2.4 is not supported, it is in Ubuntu LTS. So there needs to be an upgrade path for them.
As the problem was solved by git checkout everything at the tag, this can be closed for 2.7. I would suggest for the sake of it though to try it out for testing purposes. The program looks like a nice test framework.