Hi Reuti, William and Gowtham. So, I set 'slots' for each node which allow our users to benefit the additional threads or I create a script based on William idea to avoid the need to reboot all my nodes and turn HT off in the BIOS ?
Both solutions are quite interesting. Thanks a lot, Best regards. Rémy 2016-07-19 12:34 GMT+02:00 Reuti <[email protected]>: > Hi, > > > Am 19.07.2016 um 10:22 schrieb Rémy Dernat <[email protected]>: > > > > Hi, > > > > I have many nodes with hyperthreading enable. > > I would like to know if modifying the complex value 'num_proc' or 'slots' > > Setting slots would be the way to go. > > > to the half of cores is the same thing that to disable the > hyperthreading. > > No. > > > If not, what is the difference ? > > Limiting the slots will still allow the OS to use the additional threads. > And it's still up to the OS where to put each thread. > > http://gridengine.org/pipermail/users/2016-March/009028.html > > Switching it off on a BIOS level will also change the internal operation > of the pipeline in the CPU as there are no threads to handle any more. IIRC > there was something about it on the Beowulf list. > > -- Reuti
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