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