setting thread number for cortical surface extration Forums › Forums › Cortical Surface Extraction › setting thread number for cortical surface extration This topic contains 1 reply, has 1 voice, and was last updated by wstae 3 years, 4 months ago. Author Posts November 12, 2016 at 9:57 am #577 wstaeParticipant My iMAC has 8 cores, but cortical_extraction uses only 4 cores. How can I increase the usage of cores in GUI and commandline? Best regards. Woo-Suk Tae November 14, 2016 at 5:12 am #579 wstaeParticipant I’am sorry, my iMAC has physical 4 cores. When I ran cortical extraction in my new Centos 7 workstation (Xeon dual CPU 24 physical cores), cortical extraction used only one core. Can I increased the core number up t0 24? Author Posts You must be logged in to reply to this topic.