yade-dev team mailing list archive

[Matthias Frank <matthias.frank@xxxxxxxxxxxxx>]

hi bruno,

i use your first version of the parallel collider for quiet a while 
during model development and also calibration. i saw no differences 
between yade-1.07 and your version.

i did some benchmarks with 4 to 16 sandy bridge cores at our bull 
cluster. getting more than 16 cores for openmp applications is quit 
difficult.
done on an  exclusively used 16 core node

=============== 1 threads =============================
number of bodies 200813

Elapsed  47.6222550869  sec
Performance  4.19971712039  iter/sec
Extrapolation on 1e5 iters  6.6142020954  hours
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*
Name Count                 Time            Rel. time
-------------------------------------------------------------------------------------------------------
ForceResetter 200             594120us                1.25%
InsertionSortCollider                                 7 
15686671us               32.95%
InteractionLoop                                     200 
21787610us               45.76%
NewtonIntegrator                                    200 
9541243us               20.04%
TOTAL 47609645us              100.00%

Common time  1383.60180092 s


5037  spheres, velocity= 103.875852973 +- 6.56561134015 %
25103  spheres, velocity= 31.681069095 +- 3.69992939292 %
50250  spheres, velocity= 15.6112167455 +- 0.651579666153 %
100467  spheres, velocity= 7.65955209926 +- 0.740064173207 %
Calculation velocity is unstable, try to close all programs and start 
performance tests again
200813  spheres, velocity= 4.52368811131 +- 12.3907756519 %


SCORE: 6055
Number of threads  1
=============== 4 threads =============================
number of bodies 200813

Elapsed  29.6409780979  sec
Performance  6.7474156669  iter/sec
Extrapolation on 1e5 iters  4.1168025136  hours
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*
Name Count                 Time            Rel. time
-------------------------------------------------------------------------------------------------------
ForceResetter                                       200 
2919976us                9.85%
InsertionSortCollider                                 7 
15675024us               52.89%
InteractionLoop                                     200 
5309648us               17.92%
NewtonIntegrator                                    200 
5730646us               19.34%
TOTAL 29635295us              100.00%

Common time  641.693111897 s


Calculation velocity is unstable, try to close all programs and start 
performance tests again
5037  spheres, velocity= 232.725838879 +- 14.3014472878 %
Calculation velocity is unstable, try to close all programs and start 
performance tests again
25103  spheres, velocity= 72.3475644141 +- 12.8106054968 %
50250  spheres, velocity= 50.2926096116 +- 3.01250915287 %
100467  spheres, velocity= 18.9664279425 +- 1.40241049531 %
200813  spheres, velocity= 6.95879166249 +- 2.72955035307 %


SCORE: 13080
Number of threads  4
=============== 8 threads =============================
number of bodies 200813

Elapsed  28.8497908115  sec
Performance  6.9324592787  iter/sec
Extrapolation on 1e5 iters  4.00691539049  hours
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*
Name Count                 Time            Rel. time
-------------------------------------------------------------------------------------------------------
ForceResetter                                       200 
4760739us               16.51%
InsertionSortCollider                                 7 
15682352us               54.38%
InteractionLoop                                     200 
3398981us               11.79%
NewtonIntegrator                                    200 
4997676us               17.33%
TOTAL 28839750us              100.00%

Common time  629.34264183 s


Calculation velocity is unstable, try to close all programs and start 
performance tests again
5037  spheres, velocity= 242.232297207 +- 18.7054194438 %
25103  spheres, velocity= 78.2112705997 +- 4.19360243937 %
50250  spheres, velocity= 46.6877664726 +- 2.81481812835 %
100467  spheres, velocity= 19.9932164704 +- 3.06039659404 %
200813  spheres, velocity= 6.92396036557 +- 0.361116951928 %


SCORE: 13272
Number of threads  8
=============== 12 threads =============================
number of bodies 200813

Elapsed  29.2484679222  sec
Performance  6.83796500151  iter/sec
Extrapolation on 1e5 iters  4.06228721142  hours
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*
Name Count                 Time            Rel. time
-------------------------------------------------------------------------------------------------------
ForceResetter                                       200 
7943958us               27.17%
InsertionSortCollider                                 7 
15713441us               53.75%
InteractionLoop                                     200 
2522508us                8.63%
NewtonIntegrator                                    200 
3055652us               10.45%
TOTAL 29235560us              100.00%

Common time  667.634572983 s


5037  spheres, velocity= 189.874951285 +- 9.74398679139 %
25103  spheres, velocity= 79.4292831485 +- 6.59393629842 %
50250  spheres, velocity= 48.2684323576 +- 4.29336410346 %
100467  spheres, velocity= 19.2778991779 +- 6.87288661534 %
200813  spheres, velocity= 7.05669848487 +- 2.29609774368 %


SCORE: 12914
Number of threads  12

=============== 16 threads =============================
number of bodies 200813

Elapsed  27.1387059689  sec
Performance  7.36954813651  iter/sec
Extrapolation on 1e5 iters  3.7692647179  hours
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*
Name Count                 Time            Rel. time
-------------------------------------------------------------------------------------------------------
ForceResetter                                       200 
5765158us               21.26%
InsertionSortCollider                                 7 
15685115us               57.84%
InteractionLoop                                     200 
2002979us                7.39%
NewtonIntegrator                                    200 
3665586us               13.52%
TOTAL 27118839us              100.00%

Common time  781.653450966 s


5037  spheres, velocity= 155.295128456 +- 5.31523351848 %
25103  spheres, velocity= 58.9500296071 +- 7.67003146996 %
50250  spheres, velocity= 38.5475112683 +- 2.84583454585 %
100467  spheres, velocity= 17.2375970816 +- 6.15206324777 %
200813  spheres, velocity= 6.87034005987 +- 7.15657372906 %

SCORE: 11009
Number of threads  16


matthias

On 10.04.2014 12:58, Bruno Chareyre wrote:
> On 10/04/14 02:01, Klaus Thoeni wrote:
> > just to clarify, Test 2 is done by increasing the number of iterations (1x, 3x
> > and 12x the number of iterations specified in checkPerf.py). This means the
> > number of interactions should increase as well and, hence, particle velocities
> > should decrease because of more interactions.
> That is what I was thinking. And more interactions means less (relative)
> time spent in collider.
>
> > I added a table with the collider scaling factor for 1 million particles and
> > iter x 12.
> Thanks! So there is still an optimum near 12-14. It may be possible to
> improve (choosing approriate chunksizes internally), but it needs
> serious testing.
>
> > Note your T(j8)=T(j1)/5.8 is actually T(j8)=T(j1)/4.8. Where did you get the
> > number from? You must look into the uploaded files in order to get this numbers
> I used the x1 line since I was not expecting any influence of the number
> of steps on the collider's performance:
> 187/20=5.8
> Now I see it is different with other lines. Weird.
>
> Bruno
>
>
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--
----------------------------
Dipl.-Inf. Matthias Frank
wissenschaftlicher Mitarbeiter

Technische Universität Dresden
Fakultät Maschinenwesen
Institut für Verarbeitungsmaschinen und mobile Arbeitsmaschinen
Professur für Verarbeitungsmaschinen und Verarbeitungstechnik

01062 Dresden

Tel.: +49 351 463 36124
E-Mail: matthias.frank@xxxxxxxxxxxxx
www.vat.tu-dresden.de