Each runner needs a unique random seed to reduce the chance of port
number collisions. The new scheme uses a consistent per-runner source of
randomness which results in deterministic behaviour, as it did before.
Ref: #10818
When the -j option is given, a new process is spawned in which the test
programs are run and from which test servers are started. Only one
process can be started at once, but this is sufficient to test that the
infrastructure can isolate those functions in a new task. There should
be no visible difference between the two modes at the moment.
Ref: #10818Closes#11064
There will soon be multiple log directories so the paths will no longer
be static in runtests.pl. Also, get rid of $SERVER2IN which was not
used.
Ref: #10818
testutil.pm now contains a few miscellaneous functions that are used in
several places but have no better place to live. subvariables moves to
servers.pm since most variables that it substitutes relate to servers,
so this is the most appropriate place. Rename a few functions for better
naming consistency.
Ref: #10818Closes#10995
This is code that is directly responsible for running a single test.
This will eventually run in a separate process as part of the parallel
testing project.
Ref: #10818
