On Friday 2022-10-07 07:48, Stephan Kulow wrote:
Am 06.10.22 um 09:45 schrieb Jan Engelhardt:
== Summary ==
Gains from x86-64-v2 are small if any, but the penalties for going i586-on-64bit can be really significant.
Question remains if those micro servers that people have around are really used for performance crititical tasks.
My upcoming use case is a big screen projection of a livestream of a LAN gathering. A spare laptop was/is used to run VLC to play 1080p 60fps MPEG4. The CPU demand as per top(1) is something like 80%, or perhaps 75 fps decoding speed. It's critical, but also not critical until the decoding speed is at a borderline 61 fps. In essence, the machine is still good for the task, can probably even take another round of Retbleed/Spectre mitigations or a fourth level of FORTIFY_SOURCE. But the use case prospectively can't take the instakill that would come with downgrading from x64 to i586.