From b4eae244826a0fb8907ef50c8ef9a38da40b719d Mon Sep 17 00:00:00 2001
From: Dennis Kobert <dennis@kobert.dev>
Date: Sat, 8 Mar 2025 21:06:20 +0100
Subject: Vendor perf event

---
 perf-event/examples/println-cpi.rs | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 perf-event/examples/println-cpi.rs

(limited to 'perf-event/examples/println-cpi.rs')

diff --git a/perf-event/examples/println-cpi.rs b/perf-event/examples/println-cpi.rs
new file mode 100644
index 0000000..6524c37
--- /dev/null
+++ b/perf-event/examples/println-cpi.rs
@@ -0,0 +1,30 @@
+fn main() -> std::io::Result<()> {
+    use perf_event::events::Hardware;
+    use perf_event::{Builder, Group};
+
+    let mut group = Group::new()?;
+    let cycles = Builder::new()
+        .group(&mut group)
+        .kind(Hardware::CPU_CYCLES)
+        .build()?;
+    let insns = Builder::new()
+        .group(&mut group)
+        .kind(Hardware::INSTRUCTIONS)
+        .build()?;
+
+    let vec = (0..=51).collect::<Vec<_>>();
+
+    group.enable()?;
+    println!("{:?}", vec);
+    group.disable()?;
+
+    let counts = group.read()?;
+    println!(
+        "cycles / instructions: {} / {} ({:.2} cpi)",
+        counts[&cycles],
+        counts[&insns],
+        (counts[&cycles] as f64 / counts[&insns] as f64)
+    );
+
+    Ok(())
+}
-- 
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