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Mateusz779 2021-08-27 12:48:25 +02:00 committed by GitHub
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2 changed files with 58 additions and 33 deletions

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@ -1,14 +1,26 @@
#
# @Mateusz779
#
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
@author: Mateusz779
"""
from decimal import Decimal
from decimal import getcontext
import time
from multiprocessing.dummy import Pool as Pool #pip3 install multiprocess
from tqdm import tqdm #pip3 install tqdm
from multiprocessing.dummy import Pool as Pool
from tqdm import tqdm
import argparse
threads=4 #threads number
count = 10000 #number of numbers after the point
parser = argparse.ArgumentParser(description='The script computes the number pi.')
parser.add_argument('-t', '--threads', help="Number of threads deffault 4", required=False,type=int, default=4)
parser.add_argument('-c', '--count', help="Number of numbers after the point deffault 10000", required=False,type=int, default=10000)
parser.add_argument('-f', '--filename', help="File to save result", required=False)
args = parser.parse_args()
threads=args.threads
count = args.count #number of numbers after the point
thread_list = []
count=count+1
@ -23,34 +35,43 @@ def pi(start):
start_table = []
if count >500:
th=int(threads*(count/1000))
tasks=int(threads*(count/1000))
else:
th=1
while count%th!=0:
if count>th:
th=th+1
else:
th=th-1
tasks=1
one_count=int(count/th)
one_count=int(count/tasks)
for i in range(th):
start_table.append(int((one_count*i)))
def main():
start_table = [int((one_count * i)) for i in range(tasks)]
start = time.time()
with Pool(processes=threads) as pool:
start = time.time()
with Pool(processes=threads) as pool:
results = pool.starmap(
pi,
iterable=zip(start_table),
chunksize=100000 // threads
)
end = time.time()
result=0
getcontext().prec=count
sort = sorted(list_all.items())
for i in sort:
end = time.time()
result=0
getcontext().prec=count
sort = sorted(list_all.items())
for i in sort:
result=result+i[1]
print(Decimal(result))
print("\n\n")
print("Elapsed time: ",end - start,"s\n")
print(Decimal(result))
print("\n\n")
print("Elapsed time: ",end - start,"s\n")
if args.filename!=None:
f = open(args.filename, "w")
f.write(str(Decimal(result)))
f.close()
if __name__ == "__main__":
main()

4
requirements.txt Normal file
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@ -0,0 +1,4 @@
# Automatically generated by https://github.com/damnever/pigar.
# pi/BBP multithreading.py: 13
tqdm == 4.62.2