performance measurements
Each table row shows performance measurements for this Python 2 program with a particular command-line input value N.
| N | CPU secs | Elapsed secs | Memory KB | Code B | ≈ CPU Load |
|---|---|---|---|---|---|
| 1 | 24.86 | 24.86 | 6,336 | 370 | 0% 0% 100% 0% 0% 0% 0% 0% |
Read the ↓ make, command line, and program output logs to see how this program was run.
Read iobench benchmark to see what this program should do.
notes
iobench Python 2 program source code
import os, time
def measure(func, num1, num2):
t0 = time.time()
func(num1, num2)
print func.__code__.co_name, "%d bytes, %.2fus per write" % (
num2, (time.time() - t0) / num1 * 1000 * 1000)
def fwrite(num, num2):
fd = os.open("/dev/null", os.O_WRONLY)
for i in xrange(num):
os.write(fd, " " * num2)
def fread(num, num2):
fd = os.open("/dev/full", os.O_RDONLY)
for i in xrange(num):
os.read(fd, num2)
def file_write(num, num2):
f = open("/dev/null", "w")
for i in xrange(num):
f.write(" " * num2)
f.flush()
def file_read(num, num2):
f = open("/dev/full")
for i in xrange(num):
f.read(num2)
if __name__ == '__main__':
measure(fread, 10000000, 100)
measure(fwrite, 10000000, 100)
measure(fread, 10000000, 1000)
measure(fwrite, 10000000, 1000)
measure(fread, 1000000, 10000)
measure(fwrite, 1000000, 10000)
measure(file_read, 10000000, 100)
measure(file_write, 10000000, 100)
measure(file_read, 10000000, 1000)
measure(file_write, 10000000, 1000)
measure(file_read, 1000000, 10000)
measure(file_write, 1000000, 10000)
make, command-line, and program output logs
Fri, 30 Oct 2020 19:17:58 GMT COMMAND LINE: /usr/bin/python2 iobench.python 1 PROGRAM OUTPUT NOT CHECKED: fread 100 bytes, 0.29us per write fwrite 100 bytes, 0.33us per write fread 1000 bytes, 0.38us per write fwrite 1000 bytes, 0.39us per write fread 10000 bytes, 0.75us per write fwrite 10000 bytes, 0.44us per write file_read 100 bytes, 0.14us per write file_write 100 bytes, 0.15us per write file_read 1000 bytes, 0.28us per write file_write 1000 bytes, 0.25us per write file_read 10000 bytes, 0.92us per write file_write 10000 bytes, 0.54us per write