Timeline for Checking if HyperThreading is enabled or not?
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 21, 2019 at 18:03 | comment | added | Anthony Geoghegan | The output of those commands simply indicate there are two logical CPUs. They could be provided by two cores on the same physical chip that information alone doesn't allow us to tell whether or not hyper-threading is being used. | |
| Jul 8, 2015 at 3:11 | comment | added | Chang Hyun Park | I've got a 2 socket machine, and the physical id seems to represent the socket/chip. The core id seems to point to the same physical core | |
| Feb 11, 2015 at 17:49 | comment | added | BillT | The ht flag is unreliable, at least in some cases. For instance, my dell box with Xeon 5150 reports ht in flags, but processor definitely does not support hyper-threading. | |
| Nov 9, 2014 at 11:39 | comment | added | Andomar | If you have a Xeon processor with 4 cores, it will show as one physical id and four processors. So you can have multiple processors per physical id without hyperhtreading. | |
| May 2, 2014 at 12:22 | history | edited | Coren | CC BY-SA 3.0 | added 533 characters in body |
| May 2, 2014 at 12:15 | comment | added | Coren | @RiccardoMurri Damn it, you're right. It's not like for vmx extension. I have updated my answer. | |
| Apr 25, 2014 at 10:32 | comment | added | Riccardo Murri | I'm pretty sure it's not. I have both HT-enabled and HT-disabled servers, and all of them show the ht flag. | |
| Apr 24, 2014 at 9:48 | comment | added | Coren | @RiccardoMurri As far as I know, when HT is disabled, ht flag does not appear in /proc/cpuinfo | |
| Apr 23, 2014 at 18:01 | comment | added | Riccardo Murri | This will only tell you if the processor is HT capable, not if HT is actually being used. Nodes whose processor is HT-capable but where HT is not enable will still advertise ht in the CPU flags. | |
| Mar 5, 2012 at 20:39 | history | edited | Nils | CC BY-SA 3.0 | eliminated pipe |
| Mar 5, 2012 at 12:39 | history | edited | Mat | CC BY-SA 3.0 | added 5 characters in body |
| Mar 5, 2012 at 10:53 | vote | accept | doubledecker | ||
| Mar 5, 2012 at 10:53 | |||||
| Mar 5, 2012 at 9:45 | history | answered | Coren | CC BY-SA 3.0 |