bottom 0.12.3

A customizable cross-platform graphical process/system monitor for the terminal. Supports Linux, macOS, and Windows.
Documentation 
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//! CPU stats through sysinfo.
//! Supports FreeBSD.

use sysinfo::System;

use super::{CpuData, CpuDataType, CpuHarvest};
use crate::collection::error::CollectionResult;

pub fn get_cpu_data_list(sys: &System, show_average_cpu: bool) -> CollectionResult<CpuHarvest> {
    let mut cpus = vec![];

    if show_average_cpu {
        cpus.push(CpuData {
            data_type: CpuDataType::Avg,
            usage: sys.global_cpu_usage(),
        })
    }

    cpus.extend(
        sys.cpus()
            .iter()
            .enumerate()
            .map(|(i, cpu)| CpuData {
                data_type: CpuDataType::Cpu(i),
                usage: cpu.cpu_usage(),
            })
            .collect::<Vec<_>>(),
    );

    Ok(cpus)
}

#[cfg(unix)]
pub(crate) fn get_load_avg() -> crate::collection::cpu::LoadAvgHarvest {
    // The API for sysinfo apparently wants you to call it like this, rather than
    // using a &System.
    let sysinfo::LoadAvg { one, five, fifteen } = sysinfo::System::load_average();

    [one as f32, five as f32, fifteen as f32]
}