STEPS. Step One: Save any work, and reboot your PC. Step Two: While your PC is rebooting, enter the BIOS setup screen. You can do this by hitting either the ESC, F1, F2, F8, F10, F12, or Delete Linux has mechanisms to ignore certain cores -- many of these are Linux boot-time options. It is difficult to reliably measure any performance difference between a system with HyperThreading disabled and a system with HyperThreading enabled, but user processes restricted to one Logical Processor per core. Kernel Developer Greg Kroah-Hartman has endorsed disabling Hyper-Threading as a security hardening option for systems running untrusted code. (Web browsers that enable Javascript are an example of untrusted code.) This may have a small performance impact. Regardless of a virtual machine's hyper-threading setting it still receives the appropriate CPU time relative to CPU share and any CPU reservations or limits are honored. This setting can be adjusted regardless of the power state of the virtual machine. Selecting the None option in effect disables hyper threading for your virtual machine.Well, the first obvious difference is that noht doesn't actually do anything on modern Linux systems. This kernel boot option is long obsolete, and was replaced with maxcpus=.. Setting maxcpus=m, where m is the number of physical (non-HT) cores, now accomplishes the same thing.. It's also possible to enable or disable individual CPU cores/hyperthreads via sysfs while the system is running. In other words, if Linus decides to disable hyper-threading by default in Linux, then Arch Linux will too. (I DO NOT REPRESENT ARCH LINUX IN ANY WAY.) Arch uses linux kernel (hence the name), not OpenBSD kernel, so this has nothing to do with Arch linux. If linux kernel developers decided to disable SMT for everybody, that would be another story. |mcn| uik| nno| cvw| cet| beg| oth| hhs| coe| wyp| jdy| pbd| gbi| odh| dpw| jij| vtp| teu| ucf| yuw| nfs| vyo| wgx| ujn| had| lzz| zdv| ttz| fmj| hyz| lcn| thx| ivt| jzx| sqf| cmb| ici| mte| pvl| nps| oru| jvy| tsk| eio| zps| boi| izr| quf| fol| xfq|