82c0cb4e67
The pg_test_timing program was previously using INSTR_TIME_GET_NANOSEC on an absolute instr_time value in order to do a diff, which goes against the spirit of how the GET_* macros are supposed to be used, and will cause overhead in a future change that assumes these macros are typically used on intervals only. Additionally the program was doing unnecessary work in the test loop by measuring the time elapsed, instead of checking the existing current time measurement against a target end time. To support that, introduce a new INSTR_TIME_ADD_NANOSEC macro that allows adding user-defined nanoseconds to an instr_time variable. While modifying the relevant code anyway, simplify it by not handling durations <= 0 in test_timing(), since duration is unsigned and 0 is disallowed by the caller. Author: Lukas Fittl <lukas@fittl.com> Reviewed-by: Andres Freund <andres@anarazel.de> Discussion: https://postgr.es/m/CAP53Pkyxv3-3gX+aOxC5tX0p2v9RHU+XH0iyvb64+ZnBXj92vg@mail.gmail.com |
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PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.