Bug #1122
closedlttng-tools tests fails in power machine that has many cores
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Description
I'm building lttng-tools in Alpine Linux (ppc64le architecture) and the build works fine.
However, when I try to run the test suite (make -j1 check) some tests fails, see: http://termbin.com/nbmd
The Powerpc machine I'm using has 160 cores and I am building inside a lxc container.
I tried to reduce the number of cores to 16 in the lxc container configuration and the tests are now working. Maybe a bug in the tests?
Updated by Mathieu Desnoyers almost 7 years ago
Can you provide more information about the LTTng component versions you are using ?
See https://lttng.org/community/#bug-reporting-guidelines for the details we need.
Thanks,
Mathieu
Updated by Roberto Oliveira almost 7 years ago
Sure, my mistake.
- Component: lttng-tools
- Version: 2.9.5 (from https://lttng.org/files/lttng-tools/lttng-tools-2.9.5.tar.bz2)
- System information:
Architecture: ppc64le
Processor: POWER8
Kernel version: 4.9.33
OS: Alpine Linux
For information about how it is build: https://github.com/alpinelinux/aports/blob/fe62ef2fe6a814b4dd28a135a87e651683b3c6ef/testing/lttng-tools/APKBUILD
Updated by Jonathan Rajotte Julien almost 7 years ago
- Status changed from New to Feedback
Hi,
I just did a make check on a 160 cpus (emulated) vm and without an increase to the max open file limit multiple errors creeps in.
Could you retry the 160 core build with an augmented limit for open files (ulimit -n)?
Cheers
Updated by Roberto Oliveira almost 7 years ago
Yes, the problem was related with the number of cores and filedescriptors.
I increased the ulimit hard limit and now all tests are working.
Thanks for your help Jonathan!
Updated by Jonathan Rajotte Julien almost 7 years ago
- Status changed from Feedback to Resolved