bench_lang_spec (3)
NAME
bench_lang_spec - bench language specificationSYNOPSIS
bench_rm path...bench_tmpfile
bench options...
DESCRIPTION
This document specifies both names and syntax of all the commands which together are the bench language, version 1. As this document is intended to be a reference the commands are listed in alphabetical order, and the descriptions are relatively short. A beginner should read the more informally written bench language introduction first.
COMMANDS
- bench_rm path...
- This command silently removes the files specified as its arguments and then returns the empty string as its result. The command is trusted, there is no checking if the specified files are outside of whatever restricted area the benchmarks are run in.
- bench_tmpfile
-
This command returns the path to a bench specific unique temporary
file. The uniqueness means that multiple calls will return different
paths. While the path may exist from previous runs, the command itself
does not create aynthing.
The base location of the temporary files is platform dependent:
-
- Unix, and indeterminate platform
- "/tmp"
- Windows
- $TEMP
- Anything else
- The current working directory.
-
- bench options...
-
This command declares a single benchmark. Its result is the empty
string. All parts of the benchmark are declared via options, and their
values. The options can occur in any order. The accepted options are:
-
- -body script
- The argument of this option declares the body of the benchmark, the Tcl script whose performance we wish to measure. This option, and -desc, are the two required parts of each benchmark.
- -desc msg
-
The argument of this option declares the name of the benchmark. It has
to be unique, or timing data from different benchmarks will be mixed
together.
Beware! This requirement is not checked when benchmarks are executed, and the system will silently produce bogus data. This option, and -body, are the two required parts of each benchmark.
- -ipost script
- The argument of this option declares a script which is run immediately after each iteration of the body. Its responsibility is to release resources created by the body, or -ipre-bodym which we do not wish to live into the next iteration.
- -ipre script
- The argument of this option declares a script which is run immediately before each iteration of the body. Its responsibility is to create the state of the system expected by the body so that we measure the right thing.
- -iterations num
-
The argument of this option declares the maximum number of times to
run the -body of the benchmark. During execution this and the
global maximum number of iterations are compared and the smaller of
the two values is used.
This option should be used only for benchmarks which are expected or known to take a long time per run. I.e. reduce the number of times they are run to keep the overall time for the execution of the whole benchmark within manageable limits.
- -post script
- The argument of this option declares a script which is run after all iterations of the body have been run. Its responsibility is to release resources created by the body, or -pre-body.
- -pre script
- The argument of this option declares a script which is run before any of the iterations of the body are run. Its responsibility is to create whatever resources are needed by the body to run without failing.
-
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category bench of the Tcllib Trackers [core.tcl.tk/tcllib/reportlist] Please also report any ideas for enhancements you may have for either package and/or documentation.SEE ALSO
bench_intro, bench_lang_introKEYWORDS
bench language, benchmark, performance, specification, testingCATEGORY
Benchmark toolsCOPYRIGHT
Copyright (c) 2007 Andreas Kupries <andreas_kupries@users.sourceforge.net>