Some tests are unstable

[google]

Some tests are unstable

[ligurio]

@CharileBrown, could you provide details about your test environment (operating system version, applied network settings etc) and packetdrill version?

[ligurio]

See also a note in 51a1a06:

Note that some tests may be flaky due to timing constraints. One way of addressing that is with --tolerance_usecs. We may refine tests after initial commit.

[nealcardwell]

As noted above, more details (kernel version, test output for failed tests) would be helpful.

Could you please use the run_all.py script in the packetdrill distribution, and report the output? You can run it with something like:

cd ./packetdrill/gtests/net/
./packetdrill/run_all.py -S -l -v tcp

This will run all tests in a serialized fashion, and log the error messages for failed tests.

For documentation on flags see:
./packetdrill/run_all.py --help

Thanks!