annotate contrib/showstack.py @ 27394:b4d7743e174a

run-tests: add more scheduling weight hints

The scheduler would like to order test execution by expected run-time,
but doesn't know much about how long a test will run. It thus uses
test size as a proxy for run-time. By tweaking these weights we can
keep CPUs more evenly busy and thus finish sooner.

In particular, this change pushes the three currently longest-running
tests closer to the beginning:

test-largefiles-update.t
test-run-tests.t
test-gendoc.t

As the largefiles test is currently the long pole of the test suite
with higher -j factors, the sooner it's started, the sooner the tests
can end.

We also up the weight on some shorter but long-running tests that
could have previously delayed completion with low -j factors by
running very close to the end.

# showstack.py - extension to dump a Python stack trace on signal
#
# binds to both SIGQUIT (Ctrl-\) and SIGINFO (Ctrl-T on BSDs)

import sys, signal, traceback

def sigshow(*args):
    sys.stderr.write("\n")
    traceback.print_stack(args[1], limit=10, file=sys.stderr)
    sys.stderr.write("----\n")

def extsetup(ui):
    signal.signal(signal.SIGQUIT, sigshow)
    try:
        signal.signal(signal.SIGINFO, sigshow)
    except AttributeError:
        pass