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scx_bpfland: classify CPUs depending of their the base frequency

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Use the base frequency, instead of maximum frequency, to classify fast
and slow CPUs. This ensures accurate distinction between Intel Turbo
Boost CPUs and genuinely faster CPUs when auto-detecting the primary
scheduling domain.

Signed-off-by: Andrea Righi <andrea.righi@linux.dev>
This commit is contained in:
Andrea Righi 2024-08-21 09:38:20 +02:00
parent bbe388e3bc
commit 695e3b25b0
1 changed files with 3 additions and 2 deletions
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5
scheds/rust/scx_bpfland/src/main.rs
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@ -53,11 +53,12 @@ const SCHEDULER_NAME: &'static str = "scx_bpfland";
fn get_primary_cpus(powersave: bool) -> std::io::Result<Vec<usize>> {
let topo = Topology::new().unwrap();
// Iterate over each CPU directory and collect CPU ID and its max frequency.
// Iterate over each CPU directory and collect CPU ID and its base operational frequency to
// distinguish between fast and slow cores.
let mut cpu_freqs = Vec::new();
for core in topo.cores().into_iter() {
for (cpu_id, cpu) in core.cpus() {
cpu_freqs.push((*cpu_id, cpu.max_freq()));
cpu_freqs.push((*cpu_id, cpu.base_freq()));
}
}
if cpu_freqs.is_empty() {