coltonb/cs1530-threads-exercise

Using threads to calculate Pi

Threads Exercise

Unfortunately, my old single core laptop appears to gain little from threading, so I had to run the program from my Windows gaming PC.
Windows has no simple UNIX-like command to time the execution of programs, so I had to implement a quick delta time calculation to verify that my program was in fact seeing improved runtimes with the use of more threads. Output from my testing can be found below.

My Sample Output

PS F:\Projects\CS1530-Threads-Exercise> java Pi 2 100
Total   = 100
Inside  = 78
Ratio   = 0.78
Pi      = 3.12

Time    = 47 ms
PS F:\Projects\CS1530-Threads-Exercise> java Pi 4 100
Total   = 100
Inside  = 80
Ratio   = 0.8
Pi      = 3.2

Time    = 47 ms
PS F:\Projects\CS1530-Threads-Exercise> java Pi 4 1000000000
Total   = 1000000000
Inside  = 785383261
Ratio   = 0.785383261
Pi      = 3.141533044

Time    = 2047 ms
PS F:\Projects\CS1530-Threads-Exercise> java Pi 1 1000000000
Total   = 1000000000
Inside  = 785400737
Ratio   = 0.785400737
Pi      = 3.141602948

Time    = 5962 ms
PS F:\Projects\CS1530-Threads-Exercise> java Pi 2 1000000000
Total   = 1000000000
Inside  = 785416205
Ratio   = 0.785416205
Pi      = 3.14166482

Time    = 3074 ms
PS F:\Projects\CS1530-Threads-Exercise> java Pi 20 1000000000
Total   = 1000000000
Inside  = 785383308
Ratio   = 0.785383308
Pi      = 3.141533232

Time    = 1939 ms