Hello,
I'm using djacobix in Intel MKL. My testing machine is a virtual Windows Server 2012 with 16 CPUs, . I'm use the following statements in my code:
mkl_set_dynamic(0);
mkl_set_num_threads(12);
But when it runs, djacobix only uses 4 threads at a time. I found the topic "Why the MKL can only call 4 threads?" (https://software.intel.com/en-us/forums/topic/288645). It mentioned that "MKL uses just 1 thread per core". I set the environment variable "KMP_AFFINITY=verbose" as suggested, and it gave me the following outputs:
OMP: Info #204: KMP_AFFINITY: decoding x2APIC ids.
OMP: Info #205: KMP_AFFINITY: cpuid leaf 11 not supported - decoding legacy APIC ids.
OMP: Info #149: KMP_AFFINITY: Affinity capable, using global cpuid info
OMP: Info #154: KMP_AFFINITY: Initial OS proc set respected: {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
OMP: Info #156: KMP_AFFINITY: 16 available OS procs
OMP: Info #157: KMP_AFFINITY: Uniform topology
OMP: Info #159: KMP_AFFINITY: 16 packages x 1 cores/pkg x 1 threads/core (16 total cores)
OMP: Info #242: KMP_AFFINITY: pid 2828 thread 0 bound to OS proc set {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
OMP: Info #242: KMP_AFFINITY: pid 2828 thread 1 bound to OS proc set {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
OMP: Info #242: KMP_AFFINITY: pid 2828 thread 5 bound to OS proc set {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
2OMP: Info #242: KMP_AFFINITY: pid 2828 thread 3 bound to OS proc set {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
2OMP: Info #242: KMP_AFFINITY: pid 2828 thread 4 bound to OS proc set {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
04OMP: Info #242: KMP_AFFINITY: pid 2828 thread 6 bound to OS proc set {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
OMP: Info #242: KMP_AFFINITY: pid 2828 thread 7 bound to OS proc set {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
OMP: Info #242: KMP_AFFINITY: pid 2828 thread 2 bound to OS proc set {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
OMP: Info #242: KMP_AFFINITY: pid 2828 thread 8 bound to OS proc set {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
OMP: Info #242: KMP_AFFINITY: pid 2828 thread 9 bound to OS proc set {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
OMP: Info #242: KMP_AFFINITY: pid 2828 thread 10 bound to OS proc set {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
OMP: Info #242: KMP_AFFINITY: pid 2828 thread 11 bound to OS proc set {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
Is it possible to use 12 threads in djacobix on this machine?
Thanks.