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List: gentoo-user
Subject: Re: [gentoo-user] emerge times blown out
From: Alexander Puchmayr <alexander.puchmayr () linznet ! at>
Date: 2023-02-20 21:48:05
Message-ID: 5911332.lOV4Wx5bFT () hermes
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Am Samstag, 18. Februar 2023, 01:49:11 CET schrieb Adam Carter:
> I have three systems (all ~arch) and the emerge times have blown out on all
> of them across all packages. Worst example appears to be;
>
> Fri Dec 23 13:11:44 2022 >>> net-libs/webkit-gtk-2.38.3-r410
> merge time: 37 minutes and 8 seconds.
>
> Fri Dec 23 13:43:08 2022 >>> net-libs/webkit-gtk-2.38.3
> merge time: 31 minutes and 24 seconds.
>
> Sat Feb 4 21:16:40 2023 >>> net-libs/webkit-gtk-2.38.4-r410
> merge time: 6 hours, 53 minutes and 28 seconds.
>
> Sun Feb 5 04:17:12 2023 >>> net-libs/webkit-gtk-2.38.4
> merge time: 7 hours and 32 seconds.
>
> Is anyone else seeing this?
Could it be that some kind of Spectre mitigation is active? I just read about
some massive performance problems in Kernel 5.19+ on Skylake CPUs. Stable
gentoo kernel was upgraded to 6.1 recently, which could also be affected by
this problem.
See https://lkml.iu.edu/hypermail/linux/kernel/2209.1/02248.html
Try turning the mitigations off or revert to a 5.15.x kernel.
Alex
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