Slightly scuffed cpu% viewer for processes

src/main.rs

@@ -1,3 +1,41 @@
+use std::thread;
+use std::time::Duration;
+use sysinfo::{ProcessRefreshKind, ProcessesToUpdate, System};
+
 fn main() {
-    println!("Hello, world!");
+    let mut sys = System::new_all();
+    sys.refresh_cpu_usage();
+    let cpu_count = sys.cpus().len() as f32;
+
+    loop {
+        sys.refresh_processes_specifics(
+            sysinfo::ProcessesToUpdate::All,
+            true,
+            sysinfo::ProcessRefreshKind::nothing().with_cpu(),
+        );
+        print!("{esc}c", esc = 27 as char);
+        println!(
+            "{:<10} {:<30} {:<10} {:<10}",
+            "PID", "Name", "CPU %", "CPU Core %"
+        );
+        println!("{}", "-".repeat(50));
+        let mut procs: Vec<_> = sys.processes().values().collect();
+        procs.sort_by(|a, b| b.cpu_usage().partial_cmp(&a.cpu_usage()).unwrap());
+        for p in procs.iter() {
+            let normalized_cpu = p.cpu_usage() / cpu_count;
+            let mut name = p.name().to_string_lossy().into_owned();
+            if name.len() > 30 {
+                name.truncate(27);
+                name.push_str("...");
+            }
+            println!(
+                "{:<10} {:<30} {:<.2}% {:<.2}%",
+                p.pid(),
+                p.name().to_string_lossy(),
+                normalized_cpu,
+                p.cpu_usage(),
+            );
+        }
+        thread::sleep(Duration::from_millis(1000));
+    }
 }