From db15e20e35e40b4746e0ec5487867638ed0d5ab9 Mon Sep 17 00:00:00 2001 From: Jose Fernandez Date: Mon, 12 Feb 2024 22:52:00 -0700 Subject: [PATCH] Initial commit --- .devcontainer/Dockerfile | 2 + .devcontainer/devcontainer.json | 33 ++ .github/dependabot.yml | 15 + .github/workflows/rust.yml | 31 ++ .gitignore | 3 + Cargo.lock | 785 ++++++++++++++++++++++++++++++++ Cargo.toml | 17 + Cross.toml | 4 + LICENSE | 201 ++++++++ README.md | 20 + bpftop.png | Bin 0 -> 48517 bytes src/bpf_program.rs | 178 ++++++++ src/main.rs | 266 +++++++++++ 13 files changed, 1555 insertions(+) create mode 100644 .devcontainer/Dockerfile create mode 100644 .devcontainer/devcontainer.json create mode 100644 .github/dependabot.yml create mode 100644 .github/workflows/rust.yml create mode 100644 .gitignore create mode 100644 Cargo.lock create mode 100644 Cargo.toml create mode 100644 Cross.toml create mode 100644 LICENSE create mode 100644 README.md create mode 100644 bpftop.png create mode 100644 src/bpf_program.rs create mode 100644 src/main.rs diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile new file mode 100644 index 0000000..003eb25 --- /dev/null +++ b/.devcontainer/Dockerfile @@ -0,0 +1,2 @@ +FROM ghcr.io/catthehacker/ubuntu:custom-20.04-20240208 +RUN apt-get update && apt-get install -y zlib1g-dev libelf-dev \ No newline at end of file diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json new file mode 100644 index 0000000..7c6e67f --- /dev/null +++ b/.devcontainer/devcontainer.json @@ -0,0 +1,33 @@ +// For format details, see https://aka.ms/devcontainer.json. For config options, see the +// README at: https://github.com/devcontainers/templates/tree/main/src/rust +{ + "name": "Rust", + "build": { + // Path is relative to the devcontainer.json file. + "dockerfile": "Dockerfile" + } + + // Use 'mounts' to make the cargo cache persistent in a Docker Volume. + // "mounts": [ + // { + // "source": "devcontainer-cargo-cache-${devcontainerId}", + // "target": "/usr/local/cargo", + // "type": "volume" + // } + // ] + + // Features to add to the dev container. More info: https://containers.dev/features. + // "features": {}, + + // Use 'forwardPorts' to make a list of ports inside the container available locally. + // "forwardPorts": [], + + // Use 'postCreateCommand' to run commands after the container is created. + // "postCreateCommand": "rustc --version", + + // Configure tool-specific properties. + // "customizations": {}, + + // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root. + // "remoteUser": "root" +} diff --git a/.github/dependabot.yml b/.github/dependabot.yml new file mode 100644 index 0000000..0fdead7 --- /dev/null +++ b/.github/dependabot.yml @@ -0,0 +1,15 @@ +version: 2 +updates: + - package-ecosystem: "devcontainers" + directory: "/" + schedule: + interval: weekly + - package-ecosystem: "cargo" + directory: "/" + schedule: + interval: "weekly" + ignore: + # These are peer deps of Cargo and should not be automatically bumped + - dependency-name: "semver" + - dependency-name: "crates-io" + rebase-strategy: "disabled" diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml new file mode 100644 index 0000000..13a121b --- /dev/null +++ b/.github/workflows/rust.yml @@ -0,0 +1,31 @@ +name: Rust + +on: + push: + branches: [ "main" ] + tags: + - 'v*' # Trigger the workflow on push to tags like v1.0, v20.15.10 + pull_request: + branches: [ "main" ] + +env: + CARGO_TERM_COLOR: always + +jobs: + 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file mode 100644 index 0000000..4e75e2a --- /dev/null +++ b/Cross.toml @@ -0,0 +1,4 @@ +[build] +xargo = false +default-target = "x86_64-unknown-linux-gnu" +pre-build = ["apt-get update && apt-get install -y zlib1g-dev libelf-dev"] \ No newline at end of file diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..261eeb9 --- /dev/null +++ b/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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It provides a real-time view of all active eBPF programs, along with their average runtime per invocation. The tool is designed to minimize overhead by enabling performance statistics only while it is active. + +![bpftop](https://github.com/Netflix/bpftop/blob/main/bpftop.png?raw=true) + +## Features + +- Display a list of all running eBPF programs on the host +- Show the average runtime for each eBPF program +- Dynamically update the list every second +- Low overhead by enabling performance profiling only during program execution + +## Prerequisites + +- `bpftop` requires `sudo` privileges to run. +- The binary is dynamically linked to `libz` and `libelf`, so these libraries must be present on the systems where you intend to run `bpftop`. + + + diff --git a/bpftop.png b/bpftop.png new file mode 100644 index 0000000000000000000000000000000000000000..fb986f14eeb32494a29113a2ba7dcf8b467e90a0 GIT binary patch literal 48517 zcmc$_dpwli_cuIJbWq5lgdvio9FkLvA%vnK6%vyqA%t=m%qWVehA26Wvr&=rDTm4V zY%tDp$Y6}qU}iAP;Te6t_wWARzt?@ge!u7Syq@Q|{@B-C``UZ0_g-tSwf434p10;V zjgB5Zbr=8u95pdExCHW 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+ * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +#[derive(Clone)] +pub struct BpfProgram { + pub id: String, + pub bpf_type: String, + pub name: String, + pub prev_runtime_ns: u64, + pub run_time_ns: u64, + pub prev_run_cnt: u64, + pub run_cnt: u64, + pub prev_timestamp_ns: u128, + pub timestamp_ns: u128, + pub num_cpus: usize, +} + +impl BpfProgram { + pub fn average_runtime(&self) -> u64 { + if self.run_cnt == 0 { + return 0; + } + + self.run_time_ns / self.run_cnt + } + + pub fn runtime_delta(&self) -> u64 { + self.run_time_ns - self.prev_runtime_ns + } + + pub fn run_cnt_delta(&self) -> u64 { + self.run_cnt - self.prev_run_cnt + } + + pub fn timestamp_delta(&self) -> u128 { + self.timestamp_ns - self.prev_timestamp_ns + } + + pub fn events_per_second(&self) -> i64 { + if self.timestamp_delta() == 0 { + return 0; + } + let events_per_second = + self.run_cnt_delta() as f64 / self.timestamp_delta() as f64 * 1_000_000_000.0; + events_per_second.round() as i64 + } + + pub fn cpu_time_percent(&self) -> f64 { + if self.run_time_ns == 0 { + return 0.0; + } + (self.runtime_delta() as f64 / self.num_cpus as f64) / self.timestamp_delta() as f64 * 100.0 + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn test_average_runtime() { + let prog = BpfProgram { + id: "test".to_string(), + bpf_type: "test".to_string(), + name: "test".to_string(), + prev_runtime_ns: 100, + run_time_ns: 200, + prev_run_cnt: 1, + run_cnt: 2, + prev_timestamp_ns: 1000, + timestamp_ns: 2000, + num_cpus: 4, + }; + assert_eq!(prog.average_runtime(), 100); + } + + #[test] + fn test_runtime_delta() { + let prog = BpfProgram { + id: "test".to_string(), + bpf_type: "test".to_string(), + name: "test".to_string(), + prev_runtime_ns: 100, + run_time_ns: 200, + prev_run_cnt: 1, + run_cnt: 2, + prev_timestamp_ns: 1000, + timestamp_ns: 2000, + num_cpus: 4, + }; + assert_eq!(prog.runtime_delta(), 100); + } + + #[test] + fn test_run_cnt_delta() { + let prog = BpfProgram { + id: "test".to_string(), + bpf_type: "test".to_string(), + name: "test".to_string(), + prev_runtime_ns: 100, + run_time_ns: 200, + prev_run_cnt: 5, + run_cnt: 8, + prev_timestamp_ns: 1000, + timestamp_ns: 2000, + num_cpus: 4, + }; + assert_eq!(prog.run_cnt_delta(), 3); + } + + #[test] + fn test_timestamp_delta() { + let prog = BpfProgram { + id: "test".to_string(), + bpf_type: "test".to_string(), + name: "test".to_string(), + prev_runtime_ns: 100, + run_time_ns: 200, + prev_run_cnt: 1, + run_cnt: 2, + prev_timestamp_ns: 1000, + timestamp_ns: 3000, + num_cpus: 4, + }; + assert_eq!(prog.timestamp_delta(), 2000); + } + + #[test] + fn test_events_per_second() { + let prog = BpfProgram { + id: "test".to_string(), + bpf_type: "test".to_string(), + name: "test".to_string(), + prev_runtime_ns: 100, + run_time_ns: 200, + prev_run_cnt: 10, + run_cnt: 50, + prev_timestamp_ns: 1_000_000_000, + timestamp_ns: 2_000_000_000, + num_cpus: 4, + }; + assert_eq!(prog.events_per_second(), 40); + } + + #[test] + fn test_cpu_time_percent() { + let prog = BpfProgram { + id: "test".to_string(), + bpf_type: "test".to_string(), + name: "test".to_string(), + prev_runtime_ns: 100, + run_time_ns: 200, + prev_run_cnt: 1, + run_cnt: 2, + prev_timestamp_ns: 1000, + timestamp_ns: 2000, + num_cpus: 4, + }; + // Calculate expected value: ((200 - 100) / 4) / (2000 - 1000) * 100 = 2.5 + let expected = 2.5; + assert_eq!(prog.cpu_time_percent(), expected); + } +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..85c1b71 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,266 @@ +/** + * + * Copyright 2024 Netflix, Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +use std::fs::File; +use std::io; +use std::os::fd::FromRawFd; +use std::sync::{Arc, Mutex}; +use std::time::{Duration, SystemTime}; +use std::{println, thread, vec}; +use std::collections::HashMap; + +use anyhow::Result; +use bpf_program::BpfProgram; +use crossterm::event::{self, poll, Event, KeyCode, KeyModifiers}; +use crossterm::execute; +use crossterm::terminal::{ + disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen, +}; +use libbpf_rs::query::ProgInfoIter; +use libbpf_sys::bpf_enable_stats; +use ratatui::backend::{Backend, CrosstermBackend}; +use ratatui::layout::{Constraint, Layout}; +use ratatui::style::{Color, Modifier, Style}; +use ratatui::widgets::{Block, Borders, Cell, Row, Table, TableState}; +use ratatui::{Frame, Terminal}; + +mod bpf_program; + +impl From<&BpfProgram> for Row<'_> { + fn from(bpf_program: &BpfProgram) -> Self { + let height = 1; + let cells = vec![ + Cell::from(bpf_program.id.to_string()), + Cell::from(bpf_program.bpf_type.to_string()), + Cell::from(bpf_program.name.to_string()), + Cell::from(bpf_program.average_runtime().to_string()), + Cell::from(bpf_program.events_per_second().to_string()), + Cell::from(round_to_first_non_zero(bpf_program.cpu_time_percent()).to_string()), + ]; + + Row::new(cells).height(height as u16).bottom_margin(1) + } +} + +struct App { + state: TableState, + items: Arc>> +} + +impl App { + fn new() -> App { + App { + state: TableState::default(), + items: Arc::new(Mutex::new(vec![])) + } + } + + pub fn start_background_thread(&self, num_cpus: usize) { + let items_clone = Arc::clone(&self.items); + + thread::spawn(move || loop { + // Lock items for this thread's exclusive use. + let mut items = items_clone.lock().unwrap(); + + let items_copy = items.clone(); + let map: HashMap = items_copy.iter().map(|prog| (prog.id.clone(), prog)).collect(); + items.clear(); + + let iter = ProgInfoIter::default(); + for prog in iter { + let prog_name = prog.name.to_str().unwrap().to_string(); + + if prog_name.is_empty() { + continue; + } + + let duration_since_epoch = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap(); + let timestamp_nanos = duration_since_epoch.as_nanos(); + + let mut bpf_program = BpfProgram { + id: prog.id.to_string(), + bpf_type: prog.ty.to_string(), + name: prog_name, + prev_runtime_ns: 0, + run_time_ns: prog.run_time_ns, + prev_run_cnt: 0, + run_cnt: prog.run_cnt, + prev_timestamp_ns: 0, + timestamp_ns: timestamp_nanos, + num_cpus: num_cpus + }; + + if let Some(prev_bpf_program) = map.get(&bpf_program.id) { + bpf_program.prev_runtime_ns = prev_bpf_program.run_time_ns; + bpf_program.prev_run_cnt = prev_bpf_program.run_cnt; + bpf_program.prev_timestamp_ns = prev_bpf_program.timestamp_ns; + } + + items.push(bpf_program); + } + + // Explicitly drop the MutexGuard returned by lock() to unlock before sleeping. + drop(items); + + thread::sleep(Duration::from_secs(1)); + }); + } +} + +fn main() -> Result<()> { + if !running_as_root() { + println!("You must run bpftop as root"); + std::process::exit(1); + } + + // enable BPF stats while the program is running + let fd = unsafe { bpf_enable_stats(libbpf_sys::BPF_STATS_RUN_TIME) }; + if fd < 0 { + println!("Failed to enable BPF_STATS_RUN_TIME"); + std::process::exit(1); + } + // The fd will be closed when _file goes out of scope at the end of main. + let _file = unsafe { File::from_raw_fd(fd) }; + + // setup terminal + enable_raw_mode()?; + let mut stdout = io::stdout(); + execute!(stdout, EnterAlternateScreen)?; + let backend = CrosstermBackend::new(stdout); + let mut terminal = Terminal::new(backend)?; + terminal.clear()?; + + let num_cpus = num_cpus::get(); + + // create app and run it + let app = App::new(); + app.start_background_thread(num_cpus); + let res = run_app(&mut terminal, app); + + // // restore terminal + disable_raw_mode()?; + execute!(terminal.backend_mut(), LeaveAlternateScreen,)?; + terminal.show_cursor()?; + + if let Err(err) = res { + println!("{:?}", err) + } + terminal.clear()?; + + Ok(()) +} + +fn run_app(terminal: &mut Terminal, mut app: App) -> io::Result<()> { + loop { + terminal.draw(|f| ui(f, &mut app))?; + + // wait up to 100ms for a keyboard event + if poll(Duration::from_millis(100))? { + if let Event::Key(key) = event::read()? { + match key.code { + KeyCode::Char('q') => return Ok(()), + KeyCode::Esc => return Ok(()), + _ => {} + } + match (key.modifiers, key.code) { + (KeyModifiers::CONTROL, KeyCode::Char('c')) => return Ok(()), + _ => {} + } + } + } + } +} + +fn ui(f: &mut Frame, app: &mut App) { + let rects = Layout::default() + .constraints([Constraint::Percentage(100)].as_ref()) + .margin(3) + .split(f.size()); + + let selected_style = Style::default().add_modifier(Modifier::REVERSED); + let normal_style = Style::default().bg(Color::Blue); + let header_cells = [ + "ID", + "Type", + "Name", + "Avg Runtime (ns)", + "Events per second", + "CPU %", + ] + .iter() + .map(|h| Cell::from(*h).style(Style::default())); + let header = Row::new(header_cells) + .style(normal_style) + .height(1) + .bottom_margin(1); + + let items = app.items.lock().unwrap(); + + let rows: Vec = items.iter().map(|item| item.into()).collect(); + + let widths = [ + Constraint::Percentage(15), + Constraint::Percentage(25), + Constraint::Percentage(15), + Constraint::Percentage(15), + Constraint::Percentage(15), + Constraint::Percentage(15), + ]; + + let t = Table::new(rows, widths) + .header(header) + .block( + Block::default() + .borders(Borders::ALL) + .title(" eBPF programs "), + ) + .highlight_style(selected_style) + .highlight_symbol(">> "); + f.render_stateful_widget(t, rects[0], &mut app.state); +} + +fn running_as_root() -> bool { + match nix::unistd::getuid().as_raw() { + 0 => true, + _ => false, + } +} + +fn round_to_first_non_zero(num: f64) -> f64 { + if num == 0.0 { + return 0.0; + } + + let mut multiplier = 1.0; + while num * multiplier < 1.0 { + multiplier *= 10.0; + } + (num * multiplier).round() / multiplier +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn test_round_to_first_non_zero() { + assert_eq!(round_to_first_non_zero(0.002323), 0.002); + assert_eq!(round_to_first_non_zero(0.0000012), 0.000001); + assert_eq!(round_to_first_non_zero(0.00321), 0.003); + } +} \ No newline at end of file