Method summary

crates/kernel/src/perf.rs:224–231

Render a one-shot human-readable summary. Cheap to call (a single load of each counter) and safe to call concurrently with recording. When [`enabled`] is false the summary is empty so callers can dump unconditionally.

(&self)

  /// When [`enabled`] is false the summary is empty so callers can dump
  /// unconditionally.
  pub fn summary(&self) -> String {
    if !enabled() {
      return String::new();
    }
    let mut s = String::with_capacity(1024);
    let _ = self.write_summary(&mut s);
    s
  }

  fn write_summary(&self, out: &mut impl fmt::Write) -> fmt::Result {
    writeln!(out, "[ix-perf] cache hit rates:")?;