[Wien] Quad Core Benchmark

[Peter Blaha]

That makes more sense.

What about 4 jobs 1 thread ?

PS: I just checked Intels web site. They have a Quad-core Xeon 5400 with 
1.6 GHz frontsidebus. I'd expect this should be a nice processor!

Laurence Marks schrieb:
> Correction: the "x" commands reports total CPU time, whereas what is
> relevant is the WALL time
> 1 Job  1 Thread            140 Secs
> 2 Jobs 1 Thread Each   150 Secs Each (75 Secs/Job)
> 1 Job   2 Threads           88 Secs
> 2 Jobs 2 Threads Each  112 Secs (61 Secs/Job)
> 
> On Jan 6, 2008 8:17 AM, Laurence Marks <L-marks at northwestern.edu> wrote:
>> Xeon 3210 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 (OMP_NUM_THREADS=1)
>> 1 Job 2 Threads         168 Secs (OMP_NUM_THREADS=2)
>> 2 Jobs 1 Thread each    150 Secs each,
>>
>> Comments:
>> 1) It looks like the threading is not right as yet, and/or something
>> else; I cannot find a way to get improved performance with threads. If
>> anyone has suggestions please respond directly to me.
>> 2) The numbers suggest that this quad core is really behaving like
>> 2x2Duo Cores, i.e. a 2 CPU Xeon which is perhaps not surprising.
>>
>> --
>> 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
>>
> 
> 
>