Mailinglist Archive: opensuse-factory (439 mails)

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Re: [opensuse-factory] Huge single-core performance loss with spectre v2 mitigation enabled (it's the default)
On 10. 04. 19, 1:46, Michael Pujos wrote:
TW default: https://termbin.com/8p7z
TW nospectre_v2: https://termbin.com/bb6t
Fedora default: http://termbin.com/0u7o

Also, fedora does not have up-to-date microcode for your CPU (Tumbleweed
does) according to the links above.

Even then, your CPU is Coffee Lake and that should have support for
EIBRS, but it does not according to the output:
* Enhanced IBRS (IBRS_ALL)
* CPU indicates ARCH_CAPABILITIES MSR availability: NO
* ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: NO

I am not sure what is going on with your CPU here. Maybe EIBRS was not
released for your CPU yet.

thanks,
--
js
suse labs
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