Le 11/12/2014 21:51, Brock Palen a écrit : > When a system has HT enabled is one core presented the real one and one the > fake partner? Or is that not the case? > > If wanting to test behavior without messing with the bios how do I select > just the 'real cores' if this is the case? > > I am looking for the equivelent of > > hwloc-bind ALLREALCORES my.exe >
Assuming this still makes sense after your discussion with Jeff, you can easily bind on the first hyperthread of all cores with: hwloc-bind core:all.pu:0 my.exe None of the hyperthreads is better than the others afaik. By the way, if you can't in the BIOS, you may want to disable the hyperthread in the kernel: for i in $(hwloc-calc --whole-system --po -I pu core:all.pu:0) ; do echo 0 > /sys/devices/system/cpu/cpu$i/online ; done (write 1 instead of 0 to reenable them). Brice
