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I bought new Lenovo Ideapad 700, 6th Generation Intel® Core™ i7-6700HQ Processor (2.60GHz 6MB),

I need to disable hyper-threading via BIOS for my Ubuntu, but I could not find where it is, on the older and most of the available Desktops, it is fast-forwarded?!

Thanks :)

Mah
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  • You can't disable "multi-threading". Do you mean Hyper-Threading? This smell of an [XY Problem](http://xyproblem.info) though... Why do you want to disable it? – Ƭᴇcʜιᴇ007 Jan 05 '17 at 22:09
  • yes sorry I mean hyperthreading. – Mah Jan 05 '17 at 22:26
  • I wanna to disable it because I want to make the test with/without hyperthreading and compare the results!! – Mah Jan 05 '17 at 22:27
  • @Mahdi - If there isn't an option in the BIOS then I am 99.99% sure it cannot be done. What problem are you trying to solve, **edit your question**, by disabling Hyper-Threading? – Ramhound Jan 05 '17 at 22:28
  • @Mahdi Can you show us an image of your BIOS if possible? – Mr McClean Jan 05 '17 at 22:29
  • "I wanna to disable it because I want to make the test with/without hyperthreading and compare the results" - Set the affinity of the process to only use the number of cores you want used. – Ramhound Jan 05 '17 at 22:30
  • [Disable Hyperthreading in the Windows 7 registry](http://superuser.com/questions/305887/disable-hyperthreading-in-the-windows-7-registry) – Ramhound Jan 05 '17 at 22:30
  • [disable hyperthreading on a multi-core Dell PC](http://superuser.com/questions/505820/disable-hyperthreading-on-a-multi-core-dell-pc?rq=1), which basically indicates, unless there is an option and setting the affinity isn't an accetpable solution, you are simply out of luck. Related: [Here](http://superuser.com/questions/505820/disable-hyperthreading-on-a-multi-core-dell-pc?rq=1) – Ramhound Jan 05 '17 at 22:32
  • I am working on Ubuntu, as you may know disabling joint core similar to disabling HT but it is not exactly the same. On the other machine when I disabled HT instead of 8 lcore I just see 4 cores. – Mah Jan 06 '17 at 00:50
  • @Ramhound you mean by setting GRUB_CMDLINE_LINUX_DEFAULT="quiet splash isolcpus=C0,C1,.." Or disabling HT the results should be the same?! – Mah Jan 06 '17 at 01:04
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    Yes? But unless you replace the bios firmware your limited by the functionality of your OEM hardware – Ramhound Jan 06 '17 at 01:17

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