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Дата изменения: Wed Nov 2 11:53:59 2011
Дата индексирования: Tue Oct 2 03:54:48 2012
Кодировка:
Theoretical Scalability
100

10
GByte/s
Ringlet 2D-Torus 3D-Torus PCI

1

0,1 1 10 Number of Nodes
Slide 14 - 30.09.99

100

1000


MPI_Alltoall()
2500 ScaMPI Sustained Accumulated MPI_Alltoall() bandwidth 2000

1500
MByte/s

1000

500

0 2 4 8 16 Number of nodes
Slide 15 - 30.09.99

32

64

96


MPI_Barrier()
40 ScaMPI MPI_Barrier() latency (arithmetic average) 30

20

10

0 2 4 8 16 32 48 64 96 Number of nodes
Slide 16 - 30.09.99


One-way point-to-point
One-way communication
90 80 70 60 50 40 30 20 10 0 MPICH/Myrinet MPICH/Gigabit ScaMPI/SCI

Message size
Slide 17 - 30.09.99


Two-way point-to-point
Concurrent two-way communication 100 90 80 70 60 50 40 30 20 10 0 Message size
Slide 18 - 30.09.99

MPICH/Myrinet MPICH/Gigabit ScaMPI/SCI


Ping-Pong Bandwidth
Ping-pong communication 90 80 70 60 50 40 30 20 10 0 Message size
Slide 19 - 30.09.99

MPICH/Myrinet MPICH/Gigabit ScaMPI/SCI


Ping-Pong Latency
Ping-pong communication
1000000 MPICH/Myrinet MPICH/Gigabit ScaMPI/SCI

100000

10000

1000

100

10

1

Message size
Slide 20 - 30.09.99


BarrierSynchronization
Barrier synchronization
900 800 700 600 500 400 300 200 111,98 128,18 100 0 MPICH/Myrinet
Slide 21 - 30.09.99

2 nodes 4 nodes 6 nodes 536,56

766,04

290,66

34,5 MPICH/Gigabit

7,65

8,59 ScaMPI/SCI

9,06


Bisection Bandwidth
Bisection bandwidth
300 250,38

250

200 151,01

150

100 56,1 50

0 MPICH/Myrinet
Slide 22 - 30.09.99

MPICH/Gigabit

ScaMPI/SCI


All-to-All
All-to-all communication
90 80 70 60 50 40 30 20 10 0 MPICH/Myrinet
Slide 23 - 30.09.99

79,88 2 nodes 4 nodes 6 nodes 70,3 56,42

82,41

59,31 56,75

26,47

20,64

22,91

MPICH/Gigabit

ScaMPI/SCI


Versus Origin 2000 (1)
All-to-All Bandwidth 90 80 70 60 50 40 30 20 10 0 2 4 8 9 16 25 32 36 49 64 Number of Nodes
Slide 24 - 30.09.99

Origin2k ScaMPI/SCI


Versus Origin 2000 (2)
Barrier Synchronization
500 450 400 350 300 250 200 150 100 50 0 2 4 8 9 16 25 32 36 49 64 Number of Nodes
Slide 25 - 30.09.99

Origin2k ScaMPI/SCI