Commit Graph

8 Commits

Author SHA1 Message Date
Siddhesh Poyarekar 15eaf6ffe3 benchtests: Add new directive for benchmark initialization hook
Add a new 'init' directive that specifies the name of the function to
call to do function-specific initialization.  This is useful for
benchmarks that need to do a one-time initialization before the
functions are executed.
2014-05-26 12:37:29 +05:30
Torvald Riegel 6a5d6ea128 benchtests: Add pthread_once common-case test.
We have a single thread that runs a no-op initialization once and then
repeatedly runs checks of the initialization (i.e., an acquire load and
conditional jump) in a tight loop.  This gives us, on average, the
best-case latency of pthread_once (the initialization is the
exactly-once slow path, and we're not looking at initialization-related
synchronization overheads in this case).
2014-04-10 21:22:28 +02:00
Siddhesh Poyarekar df26ea5359 Implement benchmarking script in python
Implemented the benchmark script in python since it is much cleaner
and simpler to maintain.
2014-03-21 17:32:50 +05:30
Siddhesh Poyarekar 9298ecba15 Accept output arguments to benchmark functions
This patch adds the ability to accept output arguments to functions
being benchmarked, by nesting the argument type in <> in the args
directive.  It includes the sincos implementation as an example, where
the function would have the following args directive:

  ## args: double:<double *>:<double *>

This simply adds a definition for a static variable whose pointer gets
passed into the function, so it's not yet possible to pass something
more complicated like a pre-allocated string or array.  That would be
a good feature to add if a function needs it.

The values in the input file will map only to the input arguments.  So
if I had a directive like this for a function foo:

  ## args: int:<int *>:int:<int *>

and I have a value list like this:

1, 2
3, 4
5, 6

then the function calls generated would be:

foo (1, &out1, 2, &out2);
foo (3, &out1, 4, &out2);
foo (5, &out1, 6, &out2);
2013-12-05 10:12:59 +05:30
Torvald Riegel 40fefba1b5 benchtests: Add include-sources directive.
This adds the "include-sources" directive to scripts/bench.pl.  This
allows for including source code (vs including headers, which might get
a different search path) after the inclusion of any headers.
2013-10-10 14:45:30 +03:00
Siddhesh Poyarekar a357259bf8 Add more directives to benchmark input files
This patch adds some more directives to the benchmark inputs file,
moving functionality from the Makefile and making the code generation
script a bit cleaner.  The function argument and return types that
were earlier added as variables in the makefile and passed to the
script via command line arguments are now the 'args' and 'ret'
directive respectively.  'args' should be a colon separated list of
argument types (skipped if the function doesn't accept any arguments)
and 'ret' should be the return type.

Additionally, an 'includes' directive may have a comma separated list
of headers to include in the source.  For example, the pow input file
now looks like this:

42.0, 42.0
1.0000000000000020, 1.5

I did this to unclutter the benchtests Makefile a bit and eventually
eliminate dependency of the tests on the Makefile and have tests
depend on their respective include files only.
2013-10-07 11:51:25 +05:30
Siddhesh Poyarekar c1f75dc386 Begin porting string performance tests to benchtests
This is the initial support for string function performance tests,
along with copying tests for memcpy and memcpy-ifunc as proof of
concept.  The string function benchmarks perform operations at
different alignments and for different sizes and compare performance
between plain operations and the optimized string operations.  Due to
this their output is incompatible with the function benchmarks where
we're interested in fastest time, throughput, etc.

In future, the correctness checks in the benchmark tests can be
removed.  Same goes for the performance measurements in the
string/test-*.
2013-06-11 15:08:13 +05:30
Siddhesh Poyarekar fef94eab0b Add a README for benchtests
Move instructions from the Makefile here and expand on them.
2013-05-21 14:59:50 +05:30