Ubuntu Hyper Threading Support

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Intel Hyper Threading Performance With A Core i7 On Ubuntu ...

    https://www.phoronix.com/scan.php?page=article&item=intel-ht-2018&num=1
    Jun 20, 2018 · Since I haven't done any Hyper Threading comparison benchmarks lately, I fired up some overnight albeit on Ubuntu Linux rather than any BSDs simply for the maximum interest from our largely Linux audience. Tests were done on Ubuntu 18.04 LTS x86_64 with its default Linux 4.15 kernel.

Ubuntu updates for L1 Terminal Fault vulnerabilities Ubuntu

    https://ubuntu.com/blog/ubuntu-updates-for-l1-terminal-fault-vulnerabilities
    Aug 14, 2018 · Ubuntu updates for the intel-microcode package are also being made available. Microcode updates are not required for this issue due to a software fallback mode present in the Ubuntu kernel updates. ... The file will contain the following contents for processors that do not support Intel Hyper-Threading or where Hyper-Threading has been disabled ...

linux - Checking if HyperThreading is enabled or not ...

    https://unix.stackexchange.com/questions/33450/checking-if-hyperthreading-is-enabled-or-not
    Jul 08, 2014 · Checking if HyperThreading is enabled or not? Ask Question Asked 7 ... my dell box with Xeon 5150 reports ht in flags, but processor definitely does not support hyper-threading. – BillT Feb 11 '15 at 17:49. 2. I've got a 2 socket ... Fixing and utilizing 4/8 locked out physical cores in Ubuntu Linux kernel, Overclocked values also not seen in ...

How do I enable hyperthreading in a Intel ... - Ask Ubuntu

    https://askubuntu.com/questions/285191/how-do-i-enable-hyperthreading-in-a-intel-xeon-e5-2407/285570
    The Intel Xeon E5-2407 does not have Hyper-threading. Refer to this link . The Intel page you link to also lists the CPU has having only threads across 4 cores.

How do I enable hyperthreading in a Intel ... - Ask Ubuntu

    https://askubuntu.com/questions/285191/how-do-i-enable-hyperthreading-in-a-intel-xeon-e5-2407
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Impact disabling hyperthreading in linux

    https://software.intel.com/en-us/forums/software-tuning-performance-optimization-platform-monitoring/topic/480007
    Oct 18, 2013 · not sure that in this forum , but the caption of the forum - the optimization of performance.Hyperthreading significantly reduces performance on calculate-intensive applications (for example linpak ) . Hyperthreading can be disabled in the BIOS, but it's not always convenient. Hyperthreading can be disabled into offline hyperthreading cores (in cpufreq or in the options of the …

intel - How to tell if the CPU supports hyper threading ...

    https://unix.stackexchange.com/questions/356491/how-to-tell-if-the-cpu-supports-hyper-threading
    I have an i5-7440HQ CPU which doesn't support hyper-threading (Intel, WikiPedia, and my BIOS agree on this). Yet /proc/cpuinfo and dmidecode both show that hyperthreading is supported (but disabled). Kernel 4.10.8. When running a report of all machines that are HT capable, but have it disabled, this machine shows as a false positive...

SecurityTeam/KnowledgeBase/L1TF - Ubuntu Wiki

    https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/L1TF
    Processors that support Hyper-Threads introduce an additional attack surface that must be considered since mitigation is not enabled by default. It is possible that a malicious guest could read secrets stored in memory by the host (userspace or kernel) or another guest if the two operating system environments simultaneously run on sibling Hyper-Threads from the same CPU core.

How to disable or enable hyper threading on my Linux ...

    https://www.golinuxhub.com/2018/01/how-to-disable-or-enable-hyper.html
    A single physical CPU core with hyper-threading appears as two logical CPUs to an operating system. Use below link to check the status of hyper threading on your Linux server The recommended way to disable HT is by disabling in the BIOS, if possible but this …



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