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Team Members

1. Yehoshua Ghitis, Stuff
2. Boris Bershadsky, Prime generator
3. Ozal Islam, Precision of Pi

oaislam1@myseneca.ca, bbershadsky@myseneca.ca?subject=dps901-gpu610 Email All

Progress

Assignment 1

Precision of Pi

The number of miliseconds required to complete the function for computing the precision of Pi takes longer if the number of iterations is increased by 10 exponentially.

If GPU was used to compute the function then the number of miliseconds could be drastically reduced with high number of iterations.

Test runs with number of iterations:

oaislam1@matrix:~/Ozal/GPU610/a1> time a1 100

Compute pi - took - 0 millisecs

3.131592903558551910236928961239755153656005859375

real 0m0.137s

user 0m0.004s

sys 0m0.008s

oaislam1@matrix:~/Ozal/GPU610/a1> time a1 5000

Compute pi - took - 0 millisecs

3.14139265359178754266622490831650793552398681640625

real 0m0.145s

user 0m0.004s

sys 0m0.004s

oaislam1@matrix:~/Ozal/GPU610/a1> time a1 10000

Compute pi - took - 1 millisecs

3.141492653590030936783250581356696784496307373046875

real 0m0.143s

user 0m0.000s

sys 0m0.012s

oaislam1@matrix:~/Ozal/GPU610/a1> time a1 100000

Compute pi - took - 12 millisecs

3.14158265358971622305261917063035070896148681640625

real 0m0.141s

user 0m0.012s

sys 0m0.012s

oaislam1@matrix:~/Ozal/GPU610/a1> time a1 1000000

Compute pi - took - 139 millisecs

3.141591653589779209454491137876175343990325927734375

real 0m0.269s

user 0m0.140s

sys 0m0.008s

oaislam1@matrix:~/Ozal/GPU610/a1> time a1 1000000000

Compute pi - took - 178576 millisecs

3.14159265258789854868837210233323276042938232421875

real 2m58.717s

user 2m58.315s

sys 0m0.040s

Sample GProf profile:

Flat profile:

Each sample counts as 0.01 seconds.

% cumulative self self total

time seconds seconds calls Ts/call Ts/call name

100.00 10.05 10.05 compute_pi(int)

0.00 10.05 0.00 1 0.00 0.00 _GLOBAL__sub_I__Z10compute_pii