mirror of
https://chromium.googlesource.com/crosvm/crosvm
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tools: contrib: Add cros_tracing_analyser
Extract event_name and timestamp from input file and calculate latency of cros_tracing event and output it. BUG=b:297954291 TEST= Run the tool with a trace.dat collected by trace-cmd. Change-Id: Ia9b5814d35fa33a185278f7e3128592a2ac783d6 Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4806243 Reviewed-by: Takaya Saeki <takayas@chromium.org> Reviewed-by: Ryuichiro Chiba <chibar@chromium.org> Commit-Queue: Natsuko Mineno <natsukomineno@chromium.org> Reviewed-by: Morg <morg@google.com>
This commit is contained in:
Natsuko Mineno
crosvm LUCI
parent
e6874ad511
commit
016b1c9b6c
4 changed files with 566 additions and 0 deletions
395
tools/contrib/cros_tracing_analyser/Cargo.lock
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395
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15
tools/contrib/cros_tracing_analyser/Cargo.toml
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15
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Normal file
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@ -0,0 +1,15 @@
|
|||
[package]
|
||||
name = "cros_tracing_analyser"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[dependencies]
|
||||
argh = "*"
|
||||
libtracecmd = ">=0.2.0"
|
||||
once_cell = "1.18.0"
|
||||
serde = { version = "*", features = ["derive"] }
|
||||
serde_json = "*"
|
||||
|
||||
[workspace]
|
||||
13
tools/contrib/cros_tracing_analyser/src/README.md
Normal file
13
tools/contrib/cros_tracing_analyser/src/README.md
Normal file
|
|
@ -0,0 +1,13 @@
|
|||
# cros_tracing_analyser
|
||||
|
||||
Extract event_data and timestamp from input file from `trace-cmd record` and calculate average
|
||||
latency of cros_tracing event
|
||||
|
||||
## Build
|
||||
|
||||
Build the tool with cargo, and then run the binary with an input and output file path.
|
||||
|
||||
```
|
||||
$ cargo run
|
||||
$ cargo run -- --input /* path */ --output /* path */
|
||||
```
|
||||
143
tools/contrib/cros_tracing_analyser/src/main.rs
Normal file
143
tools/contrib/cros_tracing_analyser/src/main.rs
Normal file
|
|
@ -0,0 +1,143 @@
|
|||
// Copyright 2023 The ChromiumOS Authors
|
||||
// Use of this source code is governed by a BSD-style license that can be
|
||||
// found in the LICENSE file.
|
||||
|
||||
use argh::FromArgs;
|
||||
use libtracecmd::Event;
|
||||
use libtracecmd::Handler;
|
||||
use libtracecmd::Input;
|
||||
use libtracecmd::Record;
|
||||
use once_cell::sync::OnceCell;
|
||||
use serde::{Deserialize, Serialize};
|
||||
use std::collections::HashMap;
|
||||
use std::collections::HashSet;
|
||||
use std::io::Write;
|
||||
|
||||
#[derive(FromArgs, Debug)]
|
||||
/// Command line parameters.
|
||||
struct Config {
|
||||
#[argh(option)]
|
||||
/// path to the input .dat file
|
||||
input: String,
|
||||
#[argh(option)]
|
||||
/// path to the output .json file
|
||||
output: String,
|
||||
}
|
||||
|
||||
#[derive(Debug, Serialize, Deserialize)]
|
||||
struct EventInformation {
|
||||
pid: i32,
|
||||
cpu: i32,
|
||||
name: String,
|
||||
time_stamp: u64,
|
||||
details: String,
|
||||
}
|
||||
|
||||
#[derive(Default, Debug, Serialize, Deserialize)]
|
||||
struct EventData {
|
||||
event_names: HashSet<String>,
|
||||
stats: Vec<EventInformation>,
|
||||
}
|
||||
|
||||
impl EventData {
|
||||
// Populates all cros_tracing events in event_names
|
||||
fn populate_event_names(&mut self) {
|
||||
let mut event_names = HashSet::<String>::new();
|
||||
for stat in &self.stats {
|
||||
if stat.details.contains("Enter") {
|
||||
let split = stat.details.split_whitespace().collect::<Vec<&str>>();
|
||||
let name = split[4];
|
||||
event_names.insert(name.to_string());
|
||||
}
|
||||
}
|
||||
self.event_names = event_names;
|
||||
}
|
||||
// Calculates average latency of each cros_tracing event
|
||||
fn calculate_function_time(&self) -> HashMap<String, u64> {
|
||||
let mut values = HashMap::new();
|
||||
for event in self.event_names.iter() {
|
||||
let mut count = 0;
|
||||
let mut sum_time = 0;
|
||||
let enter = format!("Enter: {event}");
|
||||
let exit = format!("Exit: {event}");
|
||||
for i in 0..self.stats.len() {
|
||||
if self.stats[i].details.contains(&enter) {
|
||||
let split_enter = self.stats[i]
|
||||
.details
|
||||
.split_whitespace()
|
||||
.collect::<Vec<&str>>();
|
||||
let enter_id = split_enter[1];
|
||||
for j in i + 1..self.stats.len() {
|
||||
if self.stats[j].details.contains(&exit) {
|
||||
let split_exit = self.stats[j]
|
||||
.details
|
||||
.split_whitespace()
|
||||
.collect::<Vec<&str>>();
|
||||
let exit_id = split_exit[1];
|
||||
if enter_id == exit_id {
|
||||
let time = self.stats[j].time_stamp - self.stats[i].time_stamp;
|
||||
sum_time += time;
|
||||
count += 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
let latency = sum_time / count;
|
||||
let name = format!("{event}_latency");
|
||||
values.insert(String::from(name), latency);
|
||||
}
|
||||
values
|
||||
}
|
||||
}
|
||||
|
||||
// Struct that we implement `libtracecmd::Handler` for.
|
||||
//unit struct
|
||||
struct HandlerImplement;
|
||||
|
||||
impl Handler for HandlerImplement {
|
||||
/// Type of data passed to the callback to accumulate data.
|
||||
type AccumulatedData = EventData;
|
||||
/// Callback that processes each trace event `rec` and accumulate statistics to `data`.
|
||||
/// This callback is called for each trace event one by one.
|
||||
fn callback(
|
||||
input: &mut Input,
|
||||
rec: &mut Record,
|
||||
cpu: i32,
|
||||
data: &mut Self::AccumulatedData, //use for output
|
||||
) -> i32 {
|
||||
let event: Event = input.find_event(rec).unwrap();
|
||||
let pid = input.handle_ref().unwrap().pid(rec);
|
||||
let time_stamp = rec.ts();
|
||||
let details = event.get_fields(rec);
|
||||
let name = event.name;
|
||||
let element = EventInformation {
|
||||
pid,
|
||||
cpu,
|
||||
name,
|
||||
time_stamp,
|
||||
details,
|
||||
};
|
||||
data.stats.push(element);
|
||||
0
|
||||
}
|
||||
}
|
||||
|
||||
fn main() {
|
||||
let cfg: Config = argh::from_env();
|
||||
let input = cfg.input.clone();
|
||||
let mut input = Input::new(&input).expect("input is invalid");
|
||||
|
||||
let mut stats = HandlerImplement::process(&mut input).unwrap();
|
||||
stats.populate_event_names();
|
||||
let average_data = stats.calculate_function_time();
|
||||
let output = cfg.output.clone();
|
||||
let mut fout = std::fs::OpenOptions::new()
|
||||
.write(true)
|
||||
.create(true)
|
||||
.open(&output)
|
||||
.unwrap();
|
||||
let serialized = serde_json::to_string(&average_data).unwrap();
|
||||
fout.write_all(serialized.as_bytes());
|
||||
}
|
||||
Loading…
Reference in a new issue