pgsql: pg_test_timing utility, to measure clock monotonicity and timing

pg_test_timing utility, to measure clock monotonicity and timing cost.

Ants Aasma, Greg Smith

Branch
------
master

Details
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http://git.postgresql.org/pg/commitdiff/cee523867db29c0bfc5de7ec638ce0a4ad9b3817

Modified Files
--------------
contrib/Makefile                        |    1 +
contrib/pg_test_timing/.gitignore       |    1 +
contrib/pg_test_timing/Makefile         |   18 ++
contrib/pg_test_timing/pg_test_timing.c |  162 +++++++++++++++++++
doc/src/sgml/config.sgml                |    4 +-
doc/src/sgml/contrib.sgml               |    1 +
doc/src/sgml/filelist.sgml              |    1 +
doc/src/sgml/perform.sgml               |    4 +-
doc/src/sgml/pgtesttiming.sgml          |  261 +++++++++++++++++++++++++++++++
9 files changed, 451 insertions(+), 2 deletions(-)