Stream results for HP Integrity Superdome with 1500MHz,
6MB L3 cache Itanium2 processors:
16 cells, 64 cpus, 256GB of memory (512x512MB DIMMs):
Function Rate (MB/s) Avg time Min time Max time
Copy: 82695.4003 0.0995 0.0991 0.0997
Scale: 82475.6402 0.0994 0.0994 0.0995
Add: 83012.8911 0.1488 0.1481 0.1527
Triad: 84222.7077 0.1472 0.1459 0.1516
8 cells, 32 cpus, 128GB of memory (256x512MB DIMMs):
Function Rate (MB/s) Avg time Min time Max time
Copy: 41336.0147 0.0992 0.0991 0.0993
Scale: 41293.9520 0.0996 0.0992 0.1003
Add: 41484.8709 0.1485 0.1482 0.1492
Triad: 42187.6441 0.1460 0.1457 0.1463
4 cells, 16 cpus, 64GB of memory (128x512MB DIMMs):
Function Rate (MB/s) Avg time Min time Max time
Copy: 20701.4176 0.0996 0.0990 0.1012
Scale: 20699.3481 0.0991 0.0990 0.0993
Add: 20792.5427 0.1479 0.1478 0.1480
Triad: 21112.6698 0.1459 0.1456 0.1465
The system was booted with half of the memory in each
cell configured as local memory.
The runs used the mpi version of the stream benchmark, with
the following changes (second replaced with a C routine that
calls gettimeofday):
74c74
< PARAMETER (n=2000000,offset=0,ndim=n+offset,ntimes=10)
--- > PARAMETER (n=8002800,offset=0,ndim=n+offset,ntimes=10) 544,547c544,547 < real*8 function second(dummy) < real*8 dummy, rtc < second = rtc() < end --- > CKLC real*8 function second(dummy) > CKLC real*8 dummy, rtc > CKLC second = rtc() > CKLC end compiled as follows: cc +DSitanium2 +DD64 +O3 +Odataprefetch -Wl,+pd,64M -c second_wall.c mpif90 -o stream_d.mpi +Ofaster +DSitanium2 -Wl,+pd,64M +DD64 +Onoopenmp +extend_source +noppu stream_mpi.f second_wall.o and run with the mpsched -P RR command to distribute the processes in a round robin fashion across the locality domains. By default the MPI tasks allocated memory from the local memory in each cell. Here are the outputs for each configuration: 16 cells, 64 processors, 256 GB of memory (512x512MB DIMMs): mpsched -P RR mpirun -np 64 stream_d.mpi ---------------------------------------------- Double precision appears to have 16 digits of accuracy Assuming 8 bytes per DOUBLE PRECISION word ---------------------------------------------- Number of processors = 64 Array size = 8002800 Offset = 0 The total memory requirement is 11722.9 MB ( 183.2MB/task) You are running each test 10 times -- The *best* time for each test is used *EXCLUDING* the first and last iterations ---------------------------------------------------- Your clock granularity/precision appears to be 1 microseconds ---------------------------------------------------- Function Rate (MB/s) Avg time Min time Max time Copy: 82695.4003 0.0995 0.0991 0.0997 Scale: 82475.6402 0.0994 0.0994 0.0995 Add: 83012.8911 0.1488 0.1481 0.1527 Triad: 84222.7077 0.1472 0.1459 0.1516 ----------------------------------------------- Solution Validates! ----------------------------------------------- 8 cells, 32 processors, 128 GB of memory (256x512MB DIMMs): mpsched -P RR mpirun -np 32 stream_d.mpi ---------------------------------------------- Double precision appears to have 16 digits of accuracy Assuming 8 bytes per DOUBLE PRECISION word ---------------------------------------------- Number of processors = 32 Array size = 8002800 Offset = 0 The total memory requirement is 5861.4 MB ( 183.2MB/task) You are running each test 10 times -- The *best* time for each test is used *EXCLUDING* the first and last iterations ---------------------------------------------------- Your clock granularity/precision appears to be 1 microseconds ---------------------------------------------------- Function Rate (MB/s) Avg time Min time Max time Copy: 41336.0147 0.0992 0.0991 0.0993 Scale: 41293.9520 0.0996 0.0992 0.1003 Add: 41484.8709 0.1485 0.1482 0.1492 Triad: 42187.6441 0.1460 0.1457 0.1463 ----------------------------------------------- Solution Validates! ----------------------------------------------- 4 cells, 16 processors, 64 GB of memory (128x512MB DIMMs): mpsched -P RR mpirun -np 16 stream_d.mpi ---------------------------------------------- Double precision appears to have 16 digits of accuracy Assuming 8 bytes per DOUBLE PRECISION word ---------------------------------------------- Number of processors = 16 Array size = 8002800 Offset = 0 The total memory requirement is 2930.7 MB ( 183.2MB/task) You are running each test 10 times -- The *best* time for each test is used *EXCLUDING* the first and last iterations ---------------------------------------------------- Your clock granularity/precision appears to be 1 microseconds ---------------------------------------------------- Function Rate (MB/s) Avg time Min time Max time Copy: 20701.4176 0.0996 0.0990 0.1012 Scale: 20699.3481 0.0991 0.0990 0.0993 Add: 20792.5427 0.1479 0.1478 0.1480 Triad: 21112.6698 0.1459 0.1456 0.1465 ----------------------------------------------- Solution Validates! -----------------------------------------------Received on Mon Sep 22 19:35:03 2003
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