performance measurements
Each table row shows performance measurements for this Graal program with a particular command-line input value N.
| N | CPU secs | Elapsed secs | Memory KB | Code B | ≈ CPU Load |
|---|---|---|---|---|---|
| 1 | 122.78 | 116.50 | 562,216 | 367 | 27% 37% 5% 46% |
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 Graal program source code
import os, time
def measure(func, repetitions, size):
t0 = time.time()
func(repetitions, size)
print(
func,
"%d bytes, %.2fus per write" % (
size,
(time.time() - t0) / repetitions * 1000 * 1000
)
)
def fwrite(repetitions, size):
fd = os.open("/dev/null", os.O_WRONLY)
for i in range(repetitions):
os.write(fd, b" " * size)
def fread(repetitions, size):
fd = os.open("/dev/full", os.O_RDONLY)
for i in range(repetitions):
os.read(fd, size)
def file_write(repetitions, size):
f = open("/dev/null", "w")
for i in range(repetitions):
f.write(" " * size)
f.flush()
def file_read(repetitions, size):
f = open("/dev/full")
for i in range(repetitions):
f.read(size)
if __name__ == '__main__':
measure(fread, 1000000, 100)
measure(fwrite, 1000000, 100)
measure(fread, 1000000, 1000)
measure(fwrite, 1000000, 1000)
measure(fread, 100000, 10000)
measure(fwrite, 100000, 10000)
measure(file_read, 1000000, 100)
measure(file_write, 1000000, 100)
measure(file_read, 1000000, 1000)
measure(file_write, 1000000, 1000)
measure(file_read, 100000, 10000)
measure(file_write, 100000, 10000)
make, command-line, and program output logs
Thu, 18 Jun 2020 00:20:18 GMT COMMAND LINE: /usr/lib/jvm/java-8-graalvm/bin/graalpython iobench.graal 1 PROGRAM OUTPUT NOT CHECKED: <function fread at 0x12e75327> 100 bytes, 2.65us per write <function fwrite at 0x6fb28d5d> 100 bytes, 1.68us per write <function fread at 0x12e75327> 1000 bytes, 2.69us per write <function fwrite at 0x6fb28d5d> 1000 bytes, 2.58us per write <function fread at 0x12e75327> 10000 bytes, 2.41us per write <function fwrite at 0x6fb28d5d> 10000 bytes, 14.44us per write <function file_read at 0x59f56bb> 100 bytes, 6.74us per write <function file_write at 0x6d65ae2b> 100 bytes, 6.74us per write <function file_read at 0x59f56bb> 1000 bytes, 6.40us per write <function file_write at 0x6d65ae2b> 1000 bytes, 42.80us per write <function file_read at 0x59f56bb> 10000 bytes, 17.87us per write <function file_write at 0x6d65ae2b> 10000 bytes, 405.57us per write Please note: This Python implementation is in the very early stages, and can run little more than basic benchmarks at this point.