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Ubuntu 25.04 Delivers Decisive Lead Over Fedora 42 For Ampere Altra Performance
With the recently-launched Ubuntu 25.04 and Fedora 42 Linux distributions I've been seeing very healthy competition on Intel and AMD x86_64 hardware between these two leading Linux operating systems.
But, surprisingly, after evaluating the AArch64 performance I was surprised to find Ubuntu 25.04 delivering a decisive advantage over Fedora 42 when testing on Ampere Altra using a System76 Thelio Astra workstation. Given the competitive AMD and Intel performance between last month's Ubuntu 25.04 and Fedora 42 releases, I assumed it would be much the same way on AArch64. On the System76 Thelio Astra there is also an important difference that Ubuntu 25.04 defaults to the cppc_cpufreq driver with the ondemand governor while Fedora 42 defaulted to cppc_cpufreq with the Schedutil governor for relying on kernel scheduler utilization data.
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