This variable enables Symmetric Multi-processing (SMP) on systems
# with multiple CPU's or that support hyperthreading. Performance will
# be improved in certain Parasolid operations, such as Mass Properties,
# Booleans and silhouette generation. This option is only supported on
# platforms where Parasolid supports multi-threading.
#
# Set to 0 to disable SMP
# Set to 1 to enable SMP
按上面所说的选1就能打开smp,以前进去看了之后发现本来默认就是1,但根本感觉不出双核的效果,cpu一直是处于50%的状态。