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Committer: Michael Hope
Date: 2010-08-26 22:19:29 UTC
Revision ID: michael.hope@linaro.org-20100826221929-ppeg01mnpx34aqrp

Pulled in the initial versions

files added:

src/reference

src/reference/Makefile.am

src/reference/bionic

src/reference/bionic/memcmp.S

src/reference/bionic/memcmp16.S

src/reference/bionic/memcpy.S

src/reference/bionic/memset.S

src/reference/bionic/strlen.c

src/reference/configure.ac

src/reference/glibc

src/reference/glibc/memcpy.S

src/reference/glibc/memmove.S

src/reference/glibc/memset.S

src/reference/glibc/strlen.S

src/reference/helpers

src/reference/helpers/bounce.c

src/reference/helpers/spawn.c

src/reference/newlib

src/reference/newlib/arm_asm.h

src/reference/newlib/strcmp.c

src/reference/newlib/strcpy.c

src/reference/newlib/strlen.c

src/reference/plain

src/reference/plain/memcpy.c

src/reference/test.py

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src/reference/test.py

import ctypes

import timeit

import pprint

import gc

from pylab import *

plain = ctypes.cdll.LoadLibrary("install/lib/libplain.so")

helpers = ctypes.cdll.LoadLibrary("install/lib/libhelpers.so")

dest = ctypes.create_string_buffer(1024)

src = ctypes.create_string_buffer('Hi there', 1024)

def run(fun):

timer = timeit.default_timer

gcold = gc.isenabled()

gc.disable()

t0 = timer()

fun()

t1 = timer()

if gcold:

gc.enable()

return t1 - t0

# Calculate a good number of loops

loops = 100000

while True:

elapsed = run(lambda: helpers.spawniis(plain.memcpy, loops, dest, src, 20))

print loops, elapsed

if elapsed < 0.1:

loops *= 10

else:

loops *= 2/elapsed

base = 10**(int(math.log10(loops)))

loops = int(loops/base + 1) * base

print loops

break

# Calculate the call overhead

elapsed = run(lambda: helpers.spawniis(helpers.bounce, loops, dest, src, 20))

print elapsed

elapsed = run(lambda: helpers.spawniis(plain.memcpy, loops, dest, src, 20))

print elapsed

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