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7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN 1 Profiling • Initial timing studies – Test30, p(22MeV)+Al • Ref-06: 1960s for 500000 events • Tag10: 4240s for 500000 events (also initialisation time is slightly longer – 0.5s)

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Page 1: 7/24/2008Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN 1 Profiling Initial timing studies – Test30, p(22MeV)+Al Ref-06: 1960s for

7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

1

Profiling

• Initial timing studies – Test30, p(22MeV)+Al

• Ref-06: 1960s for 500000 events• Tag10: 4240s for 500000 events

(also initialisation time is slightly longer – 0.5s)

Page 2: 7/24/2008Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN 1 Profiling Initial timing studies – Test30, p(22MeV)+Al Ref-06: 1960s for

7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

2

kCachegrind output

• Two runs – 10k and 100k events (factors out initialistion)

• Function cost is displayed for G4 running with valgrind and debug mode (so not compiler optimised)

• A selection of the most expensive functions is displayed for– Tag10– Ref06

Page 3: 7/24/2008Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN 1 Profiling Initial timing studies – Test30, p(22MeV)+Al Ref-06: 1960s for

7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

3

100k Events

• Tag10

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7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

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7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

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7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

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7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

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Page 8: 7/24/2008Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN 1 Profiling Initial timing studies – Test30, p(22MeV)+Al Ref-06: 1960s for

7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

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10k Events

• Tag10

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7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

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Page 10: 7/24/2008Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN 1 Profiling Initial timing studies – Test30, p(22MeV)+Al Ref-06: 1960s for

7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

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Page 13: 7/24/2008Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN 1 Profiling Initial timing studies – Test30, p(22MeV)+Al Ref-06: 1960s for

7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

13

10k Events

• Ref06

Page 14: 7/24/2008Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN 1 Profiling Initial timing studies – Test30, p(22MeV)+Al Ref-06: 1960s for

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Page 18: 7/24/2008Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN 1 Profiling Initial timing studies – Test30, p(22MeV)+Al Ref-06: 1960s for

7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

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100k Events

• Ref06

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7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

20

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7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

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7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

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Page 23: 7/24/2008Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN 1 Profiling Initial timing studies – Test30, p(22MeV)+Al Ref-06: 1960s for

7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

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Page 24: 7/24/2008Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN 1 Profiling Initial timing studies – Test30, p(22MeV)+Al Ref-06: 1960s for

7/24/2008 Alex Howard, Profiling PreCompound/De-excitation mini workshop, CERN

24

Conclusions

• “String comparison” and “pow” seem to be the most expensive

• Developments cost over a factor of 2 in CPU for the De-excitation/PreCompound modules on their own


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