Re: [Qemu-devel] [PATCH 05/11] travis: build tests objects in parallel, then run tests sequentially

[Philippe Mathieu-Daudé]

On 06/19/2017 08:12 AM, Peter Maydell wrote:

> What is perhaps a problem is that I'm not sure our tests all support
> being run in parallel with each other without tripping each other up by
> using the same temporary file / TCP port / etc at once. To the
> extent that this doesn't work it's a bug, but we should start
> by doing a solid soak test of the test suite to make sure -j<bignum>
> works reliably.

I might have caught one:

$ gcc --version
gcc (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4

$ export MAKEFLAGS="-j ${PARALLEL_JOBS}"

$ echo "Using ${PARALLEL_JOBS} parallel jobs"
Using 3 parallel jobs

$ ${TEST_CMD}
[...]
  GTESTER check-qtest-unicore32
  GTESTER check-qtest-x86_64
  GTESTER check-qtest-xtensa
  GTESTER check-qtest-xtensaeb
  GTESTER tests/test-qobject-output-visitor
  GTESTER tests/test-clone-visitor
  GTESTER tests/test-qobject-input-visitor
  GTESTER tests/test-qmp-commands
  GTESTER tests/test-string-input-visitor
  GTESTER tests/test-string-output-visitor
  GTESTER tests/test-qmp-event
  GTESTER tests/test-opts-visitor
  GTESTER tests/test-qht-par
Could not access KVM kernel module: No such file or directory
failed to initialize KVM: No such file or directory
Back to tcg accelerator.
**
ERROR:tests/vhost-user-test.c:807:test_connect_fail: child process 
(/x86_64/vhost-user/connect-fail/subprocess [2642]) failed unexpectedly
qemu-system-x86_64: Failed to set msg fds.
qemu-system-x86_64: vhost VQ 0 ring restore failed: -1: Resource 
temporarily unavailable (11)
qemu-system-x86_64: Failed to set msg fds.
qemu-system-x86_64: vhost VQ 1 ring restore failed: -1: Resource 
temporarily unavailable (11)
GTester: last random seed: R02S8c0c7c003144320339c3c86cfa72ba62
make: *** [check-qtest-x86_64] Error 1

(build: https://travis-ci.org/philmd/qemu/jobs/246199793)