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 | 68.46 | 55.93 | 685,108 | 367 | 55% 13% 4% 4% 40% 17% 12% 7% |
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.
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)
Fri, 30 Oct 2020 21:28:10 GMT COMMAND LINE: /usr/lib/jvm/java-8-graalvm/bin/graalpython iobench.graal 1 PROGRAM OUTPUT NOT CHECKED: <function fread at 0x1abf01a4> 100 bytes, 1.45us per write <function fwrite at 0x73ddb7d9> 100 bytes, 0.92us per write <function fread at 0x1abf01a4> 1000 bytes, 1.49us per write <function fwrite at 0x73ddb7d9> 1000 bytes, 1.63us per write <function fread at 0x1abf01a4> 10000 bytes, 1.36us per write <function fwrite at 0x73ddb7d9> 10000 bytes, 7.34us per write <function file_read at 0x691c1263> 100 bytes, 6.29us per write <function file_write at 0x41cc5da7> 100 bytes, 4.95us per write <function file_read at 0x691c1263> 1000 bytes, 6.30us per write <function file_write at 0x41cc5da7> 1000 bytes, 16.52us per write <function file_read at 0x691c1263> 10000 bytes, 18.06us per write <function file_write at 0x41cc5da7> 10000 bytes, 135.68us per write