[Wien] Quad Core Benchmark

[Laurence Marks]

The system has a S3000AH motherboard with a 2.13 GHz Xeon X3210 and 4
GB of RAM. It is a vendors' system on which I am benchmarking, so I
don't have all the details.

Can you run the MPI tests please; it would be useful to know if there
is any difference between 2 dual-core CPU's and a 2x2duo-core CPU. At
least in my benchmarks small calculations are getting much more of a
speedup than MPI.


On Jan 7, 2008 3:05 AM, Gerhard Fecher <fecher at uni-mainz.de> wrote:
> Similar things happen to me
> 4 threads seem to be very unstable (also if using the new MKL_NUM_THREADS instead of OMP_NUM_THREADS)
>
> Do you have all memory slots filled ? What main board ?
>
> My Timings are on 2 dual-core CPUs Xeon 5160 for Wien2k07.3 ifort 10.1.008 (-FR -mp1 -w -prec_div -pc80 -pad -ip -DINTEL_VML -xT) mkl 10.0.011
> 1 Job  1 Thread            115 Secs
> 2 Jobs 1 Thread Each   119 Secs Each
> 1 Job   2 Threads           75 Secs
> 2 Jobs 2 Threads Each   93 Secs Each
> 4 Jobs 1 Thread Each    178Secs Each
>
> its slightly slower than expected from the pure clock rate (3 GHz to 2.13 GHz) compared to youre results (I did not yet check for the 08.1 version).
>
> Ciao
> Gerhard
>
> PS.: Quad Core may be a little misleading because of the Quad Core Xeons
>
> ________________________________________
> Von: wien-bounces at zeus.theochem.tuwien.ac.at [wien-bounces at zeus.theochem.tuwien.ac.at] im Auftrag von Laurence Marks [L-marks at northwestern.edu]
> Gesendet: Montag, 7. Januar 2008 01:32
> An: A Mailing list for WIEN2k users
> Betreff: [Wien] Quad Core Benchmark
>
>
> Minor format correction (for clarity)
>
> Xeon X3210 2.13GHz Quad Core (2x2Duo Core)
> ifort 10.1.008 cmkl 10.0.1.014
> FOPT =  -FR -mp1 -w -prec_div -pc80 -pad -ip -DINTEL_VML -xT
> -mtune=core2 -O3 -thread -fminshared
> LDFLAGS = $(FOPT) -L/opt/intel/mkl/10.0.1.014/lib/em64t -static
> R_LIBS = -lmkl_lapack -lguide -pthread
>
> 1 Job  1 Thread            140 Secs
> 2 Jobs 1 Thread Each   150 Secs Each
> 1 Job   2 Threads           88 Secs
> 2 Jobs 2 Threads Each  112 Secs Each
> 4 Jobs 1 Thread Each    228 Secs Each
>
> MPI Performance
> Times only (Note: CPU Times for 2 Threads are not correct, they are a
> sum over threads)
> 1 MPI, 1 Node, 1 Thread     1423 Secs HAMILT (CPU )  =   223.0, HNS
> =174.1, DIAG =  1021.4
> 1 MPI, 1 Node, 2 Threads   1038 Secs HAMILT (CPU )  =   385.4, HNS
> =194.3, DIAG =  1430.8
> 2 MPI, 1 Node, 1 Thread     1242 Secs HAMILT (WALL) =   120.3, HNS
> =129.8, DIAG =   988.4
> 2 MPI, 1 Node, 2 Threads   1105 Secs HAMILT (WALL) =   130.6, HNS
> =112.1, DIAG =   859.5
> 4 MPI, 1 Node, 1 Thread     1175 Secs HAMILT (WALL) =    80.1, HNS
> =116.8, DIAG =   977.9
>
> Comments:
> 1) Intel has introduced a host of new environmental parameters so it
> might be better to do better than this with the "right" options, but
> probably not by much.
> 2) Even though OMP_NUM_THREADS=1 or 2 the documentation indicates that
> this may not be honored.
> 3) 1 Job with 4 Threads is unstable. At best perhaps 80 seconds, at
> worse it crashes.
>
>
> --
>
> Laurence Marks
> Department of Materials Science and Engineering
> MSE Rm 2036 Cook Hall
> 2220 N Campus Drive
> Northwestern University
> Evanston, IL 60208, USA
> Tel: (847) 491-3996 Fax: (847) 491-7820
> email: L-marks at northwestern dot edu
> Web: www.numis.northwestern.edu
> Commission on Electron Diffraction of IUCR
> www.numis.northwestern.edu/IUCR_CED
>
>
>
> --
> Laurence Marks
> Department of Materials Science and Engineering
> MSE Rm 2036 Cook Hall
> 2220 N Campus Drive
> Northwestern University
> Evanston, IL 60208, USA
> Tel: (847) 491-3996 Fax: (847) 491-7820
> email: L-marks at northwestern dot edu
> Web: www.numis.northwestern.edu
> Commission on Electron Diffraction of IUCR
> www.numis.northwestern.edu/IUCR_CED
>
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-- 
Laurence Marks
Department of Materials Science and Engineering
MSE Rm 2036 Cook Hall
2220 N Campus Drive
Northwestern University
Evanston, IL 60208, USA
Tel: (847) 491-3996 Fax: (847) 491-7820
email: L-marks at northwestern dot edu
Web: www.numis.northwestern.edu
Commission on Electron Diffraction of IUCR
www.numis.northwestern.edu/IUCR_CED