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#
# python speed test jig.
# Note: this currently doesn't work.
#
opt_megabytes = 4096
min_range = 7
max_range = 20
#max_range = 14
import time,re,os
#def do_command(cmd):
# """ Run a command and return the clock time """
# print cmd
# start = time.time()
# os.system(cmd)
# end = time.time()
# return end-start
def dd_test(infile="/dev/zero",outfile="/dev/null",bs=16384):
transfer = 1024*1024*opt_megabytes
count = transfer / bs
res = re.compile("(\d+) bytes/sec")
cmd = "dd if=%s of=%s bs=%d count=%d 2>&1" % (infile,outfile,bs,count)
print cmd
for line in os.popen(cmd,"r"):
print "*",line
m = res.search(line)
if(m):
print "yum",m.group(1)
return int(m.group(1))
return False
def grep(fn,what):
import re
m = re.compile(what)
for line in open(fn,"r"):
if(m.search(line)): return line.strip()
return False
def dd_speed_tests():
cpu = grep("/var/run/dmesg.boot","CPU")
mem = grep("/var/run/dmesg.boot","real memory")
print "\n\nRunning write tests..."
block_sizes = []
for i in range(min_range,max_range):
block_sizes.append(2**i)
write_speeds = {}
for bs in block_sizes:
write_speeds[bs] = dd_test(outfile="speed.tmp",bs=bs) / 1000000.0
print "\n\nRunning read tests..."
read_speeds = {}
for bs in block_sizes:
read_speeds[bs] = dd_test(infile="speed.tmp",bs=bs) / 1000000.0
print "\n\n"
print cpu
print mem
print "Transfer Size: ",opt_megabytes,"MB"
def print_sorted(title,dict):
print title
print "bs=nn\t\tMBytes/sec"
keys = dict.keys()
keys.sort()
for k in keys:
print "%d\t\t%.2f" % (k,dict[k])
print_sorted("Write Results\ndd if=/dev/zero of=speed.tmp\n",write_speeds)
print_sorted("Read Results\ndd if=/speed.tmp of=/dev/null",read_speeds)
if(__name__=='__main__'):
dd_speed_tests()
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