Now that half the threads are permissive and half are strict, we
need to make sure we have at least two threads, so that we'll
have at least one of each kind.
Instead of choosing a lower-priority job with a 1/37 chance, have
the chance be 1/37 for half the threads, and 1/2147483647 for the
other half. This way if there are very slow jobs of low priority,
they shouldn't be able to grab all the threads when there is better
work to do.
Each piece of queued work now has an associated priority value; each
priority goes on a separate queue.
With probability (N-1)/N, the workers will take work from the highest
priority nonempty queue. Otherwise, they'll look for work in a
queue of lower priority. This behavior is meant to prevent
starvation for lower-priority tasks.
This is an "ours" merge to avoid taking any changs from maint-0.3.0:
we don't want to take the travis file, since there is a separate branch
for putting it in 0.3.1 and later.
In the Linux kernel, the BUG() macro causes an instant panic. Our
BUG() macro is different, however: it generates a nonfatal assertion
failure, and is usable as an expression.
Additionally, this patch tells util_bug.h to make all assertion
failures into fatal conditions when we're building with a static
analysis tool, so that the analysis tool can look for instances
where they're reachable.
Fixes bug 23030.
Wow, it sure seems like some compilers can't implement isnan() and
friends in a way that pleases themselves!
Fixes bug 22915. Bug trigged by 0.2.8.1-alpha and later; caused by
clang 4.
* CHANGE .travis.yml so that commands for different purposes (e.g. getting
dependencies, building, testing) are in separate config lines and sections.
* CHANGE .travis.yml to use their mechanism for installing dependencies via
apt. [0] This also allows us to not need sudo (the "sudo: false" line).
* CHANGE Travis CI tests (the "script:" section) to build and run tests in the
same manner as Jenkins (i.e. with --enable-fatal-warnings and
--disable-silent-rules and run `make check`).
* ADD Travis configuration to do all the target builds with both GCC and clang.
* ADD make flags to build with both of the cores available.
* ADD notifications for IRC, and configure email notifications (to the author
of the commit) only if the branch was previously building successfully and
the latest commit broke it.
* ADD the ability to run the Travis build matrix for OSX as well, but leave it
commented out by default (because it takes roughly ten times longer, due to a
shortage of OSX build machines).
* ADD Travis config option to cancel/fail the build early if one target has
already failed ("fast_finish: true").
* ADD comments to describe what our Travis config is doing and why it is
configured that way.
[0]: https://docs.travis-ci.com/user/installing-dependencies/#Installing-Packages-on-Container-Based-Infrastructure)
