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authorSiddhesh Poyarekar <siddhesh@redhat.com>2014-03-24 21:16:36 +0530
committerSiddhesh Poyarekar <siddhesh@redhat.com>2014-03-24 21:16:36 +0530
commit27c673b8de3072caf35bc795aa1cd77a7ca18771 (patch)
tree92046806de6f97a5532ee165f173c9ed74fb1158 /scripts
parent44152e4b05fcc8bae5628cdb37342d9b7bd5ac3c (diff)
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benchtests: Move bench.py to benchtests/scripts/
It makes much more sense to have all benchmarking-related scripts in a single place away from everything else.
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/bench.py299
1 files changed, 0 insertions, 299 deletions
diff --git a/scripts/bench.py b/scripts/bench.py
deleted file mode 100755
index e500a33..0000000
--- a/scripts/bench.py
+++ /dev/null
@@ -1,299 +0,0 @@
-#!/usr/bin/python
-# Copyright (C) 2014 Free Software Foundation, Inc.
-# This file is part of the GNU C Library.
-#
-# The GNU C Library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# The GNU C Library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with the GNU C Library; if not, see
-# <http://www.gnu.org/licenses/>.
-
-"""Benchmark program generator script
-
-This script takes a function name as input and generates a program using
-an input file located in the benchtests directory. The name of the
-input file should be of the form foo-inputs where 'foo' is the name of
-the function.
-"""
-
-from __future__ import print_function
-import sys
-import os
-import itertools
-
-# Macro definitions for functions that take no arguments. For functions
-# that take arguments, the STRUCT_TEMPLATE, ARGS_TEMPLATE and
-# VARIANTS_TEMPLATE are used instead.
-DEFINES_TEMPLATE = '''
-#define CALL_BENCH_FUNC(v, i) %(func)s ()
-#define NUM_VARIANTS (1)
-#define NUM_SAMPLES(v) (1)
-#define VARIANT(v) FUNCNAME "()"
-'''
-
-# Structures to store arguments for the function call. A function may
-# have its inputs partitioned to represent distinct performance
-# characteristics or distinct flavors of the function. Each such
-# variant is represented by the _VARIANT structure. The ARGS structure
-# represents a single set of arguments.
-STRUCT_TEMPLATE = '''
-#define CALL_BENCH_FUNC(v, i) %(func)s (%(func_args)s)
-
-struct args
-{
-%(args)s
-};
-
-struct _variants
-{
- const char *name;
- int count;
- struct args *in;
-};
-'''
-
-# The actual input arguments.
-ARGS_TEMPLATE = '''
-struct args in%(argnum)d[%(num_args)d] = {
-%(args)s
-};
-'''
-
-# The actual variants, along with macros defined to access the variants.
-VARIANTS_TEMPLATE = '''
-struct _variants variants[%(num_variants)d] = {
-%(variants)s
-};
-
-#define NUM_VARIANTS %(num_variants)d
-#define NUM_SAMPLES(i) (variants[i].count)
-#define VARIANT(i) (variants[i].name)
-'''
-
-# Epilogue for the generated source file.
-EPILOGUE = '''
-#define BENCH_FUNC(i, j) ({%(getret)s CALL_BENCH_FUNC (i, j);})
-#define FUNCNAME "%(func)s"
-#include "bench-skeleton.c"'''
-
-
-def gen_source(func, directives, all_vals):
- """Generate source for the function
-
- Generate the C source for the function from the values and
- directives.
-
- Args:
- func: The function name
- directives: A dictionary of directives applicable to this function
- all_vals: A dictionary input values
- """
- # The includes go in first.
- for header in directives['includes']:
- print('#include <%s>' % header)
-
- for header in directives['include-sources']:
- print('#include "%s"' % header)
-
- # Print macros. This branches out to a separate routine if
- # the function takes arguments.
- if not directives['args']:
- print(DEFINES_TEMPLATE % {'func': func})
- outargs = []
- else:
- outargs = _print_arg_data(func, directives, all_vals)
-
- # Print the output variable definitions if necessary.
- for out in outargs:
- print(out)
-
- # If we have a return value from the function, make sure it is
- # assigned to prevent the compiler from optimizing out the
- # call.
- if directives['ret']:
- print('static %s volatile ret;' % directives['ret'])
- getret = 'ret = '
- else:
- getret = ''
-
- print(EPILOGUE % {'getret': getret, 'func': func})
-
-
-def _print_arg_data(func, directives, all_vals):
- """Print argument data
-
- This is a helper function for gen_source that prints structure and
- values for arguments and their variants and returns output arguments
- if any are found.
-
- Args:
- func: Function name
- directives: A dictionary of directives applicable to this function
- all_vals: A dictionary input values
-
- Returns:
- Returns a list of definitions for function arguments that act as
- output parameters.
- """
- # First, all of the definitions. We process writing of
- # CALL_BENCH_FUNC, struct args and also the output arguments
- # together in a single traversal of the arguments list.
- func_args = []
- arg_struct = []
- outargs = []
-
- for arg, i in zip(directives['args'], itertools.count()):
- if arg[0] == '<' and arg[-1] == '>':
- pos = arg.rfind('*')
- if pos == -1:
- die('Output argument must be a pointer type')
-
- outargs.append('static %s out%d;' % (arg[1:pos], i))
- func_args.append(' &out%d' % i)
- else:
- arg_struct.append(' %s volatile arg%d;' % (arg, i))
- func_args.append('variants[v].in[i].arg%d' % i)
-
- print(STRUCT_TEMPLATE % {'args' : '\n'.join(arg_struct), 'func': func,
- 'func_args': ', '.join(func_args)})
-
- # Now print the values.
- variants = []
- for (k, vals), i in zip(all_vals.items(), itertools.count()):
- out = [' {%s},' % v for v in vals]
-
- # Members for the variants structure list that we will
- # print later.
- variants.append(' {"%s(%s)", %d, in%d},' % (func, k, len(vals), i))
- print(ARGS_TEMPLATE % {'argnum': i, 'num_args': len(vals),
- 'args': '\n'.join(out)})
-
- # Print the variants and the last set of macros.
- print(VARIANTS_TEMPLATE % {'num_variants': len(all_vals),
- 'variants': '\n'.join(variants)})
- return outargs
-
-
-def _process_directive(d_name, d_val):
- """Process a directive.
-
- Evaluate the directive name and value passed and return the
- processed value. This is a helper function for parse_file.
-
- Args:
- d_name: Name of the directive
- d_val: The string value to process
-
- Returns:
- The processed value, which may be the string as it is or an object
- that describes the directive.
- """
- # Process the directive values if necessary. name and ret don't
- # need any processing.
- if d_name.startswith('include'):
- d_val = d_val.split(',')
- elif d_name == 'args':
- d_val = d_val.split(':')
-
- # Return the values.
- return d_val
-
-
-def parse_file(func):
- """Parse an input file
-
- Given a function name, open and parse an input file for the function
- and get the necessary parameters for the generated code and the list
- of inputs.
-
- Args:
- func: The function name
-
- Returns:
- A tuple of two elements, one a dictionary of directives and the
- other a dictionary of all input values.
- """
- all_vals = {}
- # Valid directives.
- directives = {
- 'name': '',
- 'args': [],
- 'includes': [],
- 'include-sources': [],
- 'ret': ''
- }
-
- try:
- with open('%s-inputs' % func) as f:
- for line in f:
- # Look for directives and parse it if found.
- if line.startswith('##'):
- try:
- d_name, d_val = line[2:].split(':', 1)
- d_name = d_name.strip()
- d_val = d_val.strip()
- directives[d_name] = _process_directive(d_name, d_val)
- except (IndexError, KeyError):
- die('Invalid directive: %s' % line[2:])
-
- # Skip blank lines and comments.
- line = line.split('#', 1)[0].rstrip()
- if not line:
- continue
-
- # Otherwise, we're an input. Add to the appropriate
- # input set.
- cur_name = directives['name']
- all_vals.setdefault(cur_name, [])
- all_vals[cur_name].append(line)
- except IOError as ex:
- die("Failed to open input file (%s): %s" % (ex.filename, ex.strerror))
-
- return directives, all_vals
-
-
-def die(msg):
- """Exit with an error
-
- Prints an error message to the standard error stream and exits with
- a non-zero status.
-
- Args:
- msg: The error message to print to standard error
- """
- print('%s\n' % msg, file=sys.stderr)
- sys.exit(os.EX_DATAERR)
-
-
-def main(args):
- """Main function
-
- Use the first command line argument as function name and parse its
- input file to generate C source that calls the function repeatedly
- for the input.
-
- Args:
- args: The command line arguments with the program name dropped
-
- Returns:
- os.EX_USAGE on error and os.EX_OK on success.
- """
- if len(args) != 1:
- print('Usage: %s <function>' % sys.argv[0])
- return os.EX_USAGE
-
- directives, all_vals = parse_file(args[0])
- gen_source(args[0], directives, all_vals)
- return os.EX_OK
-
-
-if __name__ == '__main__':
- sys.exit(main(sys.argv[1:]))