[Automake-commit] [SCM] GNU Automake branch, experimental/parallel-tests-optimize-for-speed, created. v1.12-21-gdfd4750

[Stefano Lattarini]

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http://git.sv.gnu.org/gitweb/?p=automake.git;a=commitdiff;h=dfd4750c7f7f06202c0314fb45ca31fabe15347c

The branch, experimental/parallel-tests-optimize-for-speed has been created
        at  dfd4750c7f7f06202c0314fb45ca31fabe15347c (commit)

- Log -----------------------------------------------------------------
commit dfd4750c7f7f06202c0314fb45ca31fabe15347c
Author: Stefano Lattarini <address@hidden>
Date:   Sun Feb 26 00:30:18 2012 +0100

    parallel-tests: optimize global log creation
    
    With this change, the time required to execute the test case
    'testsuite-summary-speed.sh' has dropped as follows:
    
          + Slow Debian one-core i686 machine, 768 MB of RAM:
            - 1 run, from 3 minutes 30 seconds to 40 seconds
    
          + Very fast Fedora ppc64 machine, 64 cores, 64 GB of RAM:
            - 5 runs, from XXX to XXX
    
    * lib/am/check.am ($(TEST_SUITE_LOG)): Optimize for speed, by avoiding
    lots of forks with the help of ...
    (am__create_global_log): ... this new internal variable, basically
    defining a smart awk program, and ...
    (am__global_test_result_rx, am__copy_in_global_log_rx): ... these new
    internal variables, used by the one above.
    (am__rst_section): Remove as obsolete
    * t/rst-formatting.trs: Remove.
    * t/list-of-tests.mk: Update.
    * t/testsuite-summary-count-many.sh: Improve its stress testing by
    using 1 million tests rather than just 5 thousands: we can afford
    this with our new optimization, and still have the test completed
    in a reasonable time.
    
    Signed-off-by: Stefano Lattarini <address@hidden>

commit b1d3378500a4e6fba18c09393e09d062c3180c06
Author: Stefano Lattarini <address@hidden>
Date:   Thu Apr 26 22:25:35 2012 +0200

    parallel-tests: optimize 'recheck' target for speed
    
    With this change, the time required to execute the test case
    'testsuite-recheck-speed.sh' has dropped as follows:
    
      + Slow Debian one-core i686 machine, 768 MB of RAM:
        - 1 run, from 6 minutes to 40 seconds
    
      + Very fast Fedora ppc64 machine, 64 cores, 64 GB of RAM:
        - 5 runs, from XXX to XXX
    
    * lib/am/check.am (recheck): Optimize for speed, by avoiding lots of
    forks with the help of ...
    (am__list_recheck_tests): ... this new internal variable, basically
    defining a smart awk program, and ...
    (am__recheck_rx): ... this other new internal variable, used by the
    one above.
    * t/test-trs-recover2.sh: Relax by not checking for a very corner case
    we don't handle anymore.
    
    Signed-off-by: Stefano Lattarini <address@hidden>

commit 6a6862b50aefdcdb7f2bcde86181c2eef2cbd49f
Author: Stefano Lattarini <address@hidden>
Date:   Sun Feb 26 09:42:11 2012 +0100

    coverage: add performance tests on some parallel-tests aspects
    
    * t/testsuite-recheck-speed.sh: New test.
    * t/testsuite-summary-speed.sh: Likewise.
    * t/list-of-tests.mk: Update.
    
    The new tests are not meant to PASS/FAIL, but rather to help us to
    obtain quantitative measurements of the performance improvements
    offered by soon-to-appear optimization patches.
    
    Timing before the optimizations implemented by following patches:
    
      + Slow Debian one-core i686 machine, 768 MB of RAM:
        - testsuite-recheck-speed.sh: 1 run, ~ 6 minutes
        - testsuite-summary-speed.sh: 1 run, ~ 3 minutes 30 seconds
    
      + Very fast Fedora ppc64 machine, 64 cores, 64 GB of RAM:
        - testsuite-recheck-speed.sh: XXX
        - testsuite-summary-speed.sh: XXX
    
    Signed-off-by: Stefano Lattarini <address@hidden>

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