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New Intel Linux Patches Continue Working To Improve Hybrid CPU Task Placement
Building off some 'request for comments' patches sent out in April, a new set of patches appeared on Friday for the Intel P-State Linux driver for setting the asymmetric CPU capacity on hybrid systems
This, in turn, allows the schedutil cpufreq governor to set CPU performance levels consistently in the cases when tasks migrate between CPUs of different capacities. "Make intel_pstate use the HWP_HIGHEST_PERF values from MSR_HWP_CAPABILITIES to set asymmetric CPU capacity information via the previously introduced arch_set_cpu_capacity() on hybrid systems without SMT. Intel argues its for better performance and from this kernel patch work also apparent it eases the burden around better task placement / scheduling behavior between P and E cores.
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