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| 1 | +//! Example: Read and analyze perf.data from stdin in pipe mode |
| 2 | +//! |
| 3 | +//! This demonstrates the `parse_pipe()` API which works with streams (Read only). |
| 4 | +//! Compare with perfdatainfo.rs which uses `parse_file()` (requires Read + Seek). |
| 5 | +//! |
| 6 | +//! Usage: |
| 7 | +//! # Stream directly from perf record: |
| 8 | +//! perf record -o - sleep 1 | cargo run --example perfpipeinfo |
| 9 | +//! |
| 10 | +//! # Or pipe an existing file: |
| 11 | +//! cat perf.data | cargo run --example perfpipeinfo |
| 12 | +//! |
| 13 | +//! # Or from a network stream: |
| 14 | +//! nc server 1234 | cargo run --example perfpipeinfo |
| 15 | +
|
| 16 | +use std::collections::HashMap; |
| 17 | + |
| 18 | +use linux_perf_data::{PerfFileReader, PerfFileRecord}; |
| 19 | +#[allow(unused)] |
| 20 | +use linux_perf_event_reader::RecordType; |
| 21 | + |
| 22 | +fn main() { |
| 23 | + let stdin = std::io::stdin(); |
| 24 | + let PerfFileReader { |
| 25 | + mut perf_file, |
| 26 | + mut record_iter, |
| 27 | + } = match PerfFileReader::parse_pipe(stdin) { |
| 28 | + Ok(reader) => reader, |
| 29 | + Err(e) => { |
| 30 | + println!("ERROR when creating PerfFileReader: {:?}", e); |
| 31 | + return; |
| 32 | + } |
| 33 | + }; |
| 34 | + |
| 35 | + if let Ok(Some(arch)) = perf_file.arch() { |
| 36 | + println!("Arch: {arch}"); |
| 37 | + } |
| 38 | + if let Ok(Some(cmdline)) = perf_file.cmdline() { |
| 39 | + println!("CmdLine: {cmdline:?}"); |
| 40 | + } |
| 41 | + if let Ok(Some(cpu_desc)) = perf_file.cpu_desc() { |
| 42 | + println!("CPU Desc: {cpu_desc}"); |
| 43 | + } |
| 44 | + if let Ok(Some(perf_version)) = perf_file.perf_version() { |
| 45 | + println!("Perf version: {perf_version}"); |
| 46 | + } |
| 47 | + if let Ok(Some(frequency)) = perf_file.clock_frequency() { |
| 48 | + println!("Clock frequency: {frequency} ns per tick"); |
| 49 | + } |
| 50 | + if let Ok(Some(clock_data)) = perf_file.clock_data() { |
| 51 | + println!("Clock data: {clock_data:?}"); |
| 52 | + } |
| 53 | + |
| 54 | + // Print the feature sections. |
| 55 | + let features = perf_file.features(); |
| 56 | + let features: String = features |
| 57 | + .iter() |
| 58 | + .map(|f| format!("{f}")) |
| 59 | + .collect::<Vec<_>>() |
| 60 | + .join(", "); |
| 61 | + println!("Features: {features}"); |
| 62 | + println!(); |
| 63 | + if let Ok(Some(simpleperf_meta_info)) = perf_file.simpleperf_meta_info() { |
| 64 | + println!("Simpleperf meta info:"); |
| 65 | + for (k, v) in simpleperf_meta_info { |
| 66 | + println!(" {k}: {v}"); |
| 67 | + } |
| 68 | + println!(); |
| 69 | + } |
| 70 | + if let Ok(Some(simpleperf_file_symbols)) = perf_file.simpleperf_symbol_tables() { |
| 71 | + println!("Simpleperf symbol tables for the following files:"); |
| 72 | + for f in &simpleperf_file_symbols { |
| 73 | + println!(" - {}", f.path); |
| 74 | + // println!("{f:#?}"); |
| 75 | + } |
| 76 | + println!(); |
| 77 | + } |
| 78 | + |
| 79 | + // for event in perf_file.event_attributes() { |
| 80 | + // println!("Event: {event:#?}"); |
| 81 | + // } |
| 82 | + |
| 83 | + let mut event_record_map = HashMap::new(); |
| 84 | + let mut user_record_map = HashMap::new(); |
| 85 | + |
| 86 | + while let Some(record) = record_iter.next_record(&mut perf_file).unwrap() { |
| 87 | + match record { |
| 88 | + PerfFileRecord::EventRecord { attr_index, record } => { |
| 89 | + let record_type = record.record_type; |
| 90 | + *event_record_map |
| 91 | + .entry(attr_index) |
| 92 | + .or_insert_with(HashMap::new) |
| 93 | + .entry(record_type) |
| 94 | + .or_insert(0) += 1; |
| 95 | + match record.parse() { |
| 96 | + Ok(parsed_record) => { |
| 97 | + // let is_interesting = matches!(record_type, RecordType::FORK | RecordType::COMM | RecordType::MMAP| RecordType::MMAP2); |
| 98 | + let is_interesting = false; |
| 99 | + if !is_interesting { |
| 100 | + continue; |
| 101 | + } |
| 102 | + |
| 103 | + if let Some(timestamp) = |
| 104 | + record.common_data().ok().and_then(|cd| cd.timestamp) |
| 105 | + { |
| 106 | + println!( |
| 107 | + "{:?} at {} for event {}: {:?}", |
| 108 | + record_type, timestamp, attr_index, parsed_record |
| 109 | + ); |
| 110 | + } else { |
| 111 | + println!( |
| 112 | + "{:?} for event {}: {:?}", |
| 113 | + record_type, attr_index, parsed_record |
| 114 | + ); |
| 115 | + } |
| 116 | + } |
| 117 | + Err(e) => { |
| 118 | + println!( |
| 119 | + "ERROR when parsing {:?} for event {}: {:?}", |
| 120 | + record_type, attr_index, e |
| 121 | + ); |
| 122 | + } |
| 123 | + } |
| 124 | + } |
| 125 | + PerfFileRecord::UserRecord(record) => { |
| 126 | + let record_type = record.record_type; |
| 127 | + *user_record_map.entry(record_type).or_insert(0) += 1; |
| 128 | + match record.parse() { |
| 129 | + Ok(_parsed_record) => { |
| 130 | + // println!("{:?}: {:?}", record_type, parsed_record); |
| 131 | + } |
| 132 | + Err(e) => { |
| 133 | + println!("ERROR when parsing {:?}: {:?}", record_type, e); |
| 134 | + } |
| 135 | + } |
| 136 | + } |
| 137 | + } |
| 138 | + } |
| 139 | + |
| 140 | + let mut event_record_map = event_record_map |
| 141 | + .into_iter() |
| 142 | + .map(|(attr_index, histogram)| { |
| 143 | + let sum = histogram.values().sum::<u64>(); |
| 144 | + (attr_index, histogram, sum) |
| 145 | + }) |
| 146 | + .collect::<Vec<_>>(); |
| 147 | + event_record_map.sort_by_key(|(_attr_index, _histogram, sum)| -(*sum as i64)); |
| 148 | + let sum = event_record_map |
| 149 | + .iter() |
| 150 | + .map(|(_attr_index, _histogram, sum)| sum) |
| 151 | + .sum::<u64>(); |
| 152 | + |
| 153 | + println!("Event records: {sum} records"); |
| 154 | + println!(); |
| 155 | + |
| 156 | + for (attr_index, record_counts, sum) in event_record_map { |
| 157 | + let mut record_counts = record_counts.into_iter().collect::<Vec<_>>(); |
| 158 | + record_counts.sort_by_key(|(_record_type, count)| -(*count as i64)); |
| 159 | + println!( |
| 160 | + " event {} ({}): {} records", |
| 161 | + attr_index, |
| 162 | + perf_file.event_attributes()[attr_index] |
| 163 | + .name() |
| 164 | + .unwrap_or("<no event name found>"), |
| 165 | + sum |
| 166 | + ); |
| 167 | + for (record_type, count) in record_counts { |
| 168 | + println!(" {:?}: {}", record_type, count); |
| 169 | + } |
| 170 | + println!(); |
| 171 | + } |
| 172 | + |
| 173 | + let mut user_record_counts = user_record_map.into_iter().collect::<Vec<_>>(); |
| 174 | + user_record_counts.sort_by_key(|(_record_type, count)| -(*count as i64)); |
| 175 | + let sum = user_record_counts |
| 176 | + .iter() |
| 177 | + .map(|(_record_type, count)| count) |
| 178 | + .sum::<u64>(); |
| 179 | + |
| 180 | + println!("User records: {sum} records"); |
| 181 | + println!(); |
| 182 | + for (record_type, count) in user_record_counts { |
| 183 | + println!(" {:?}: {}", record_type, count); |
| 184 | + } |
| 185 | +} |
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