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Add a method for dumping self-contained HTML timeline profiles

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This commit adds the `--profiler-trace-path` flag. When combined with `-p` to
enable profiling, it dumps a profile as a self-contained HTML file to the given
path. The profile visualizes the traced operations as a gant-chart style
timeline.
This commit is contained in:
Nick Fitzgerald 2016-04-16 11:48:23 -07:00
parent 311dd0f930
commit 9fbb5c720e
17 changed files with 758 additions and 11 deletions
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20
components/util/opts.rs
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@ -17,7 +17,7 @@ use std::env;
use std::fs;
use std::fs::File;
use std::io::{self, Read, Write};
use std::path::Path;
use std::path::{Path, PathBuf};
use std::process;
use std::sync::atomic::{AtomicBool, ATOMIC_BOOL_INIT, Ordering};
use url::{self, Url};
@ -50,6 +50,10 @@ pub struct Opts {
/// cause it to produce output on that interval (`-p`).
pub time_profiler_period: Option<f64>,
/// When the profiler is enabled, this is an optional path to dump a self-contained HTML file
/// visualizing the traces as a timeline.
pub time_profiler_trace_path: Option<String>,
/// `None` to disable the memory profiler or `Some` with an interval in seconds to enable it
/// and cause it to produce output on that interval (`-m`).
pub mem_profiler_period: Option<f64>,
@ -469,6 +473,7 @@ pub fn default_opts() -> Opts {
tile_size: 512,
device_pixels_per_px: None,
time_profiler_period: None,
time_profiler_trace_path: None,
mem_profiler_period: None,
layout_threads: 1,
nonincremental_layout: false,
@ -529,6 +534,9 @@ pub fn from_cmdline_args(args: &[String]) -> ArgumentParsingResult {
opts.optopt("", "device-pixel-ratio", "Device pixels per px", "");
opts.optopt("t", "threads", "Number of paint threads", "1");
opts.optflagopt("p", "profile", "Profiler flag and output interval", "10");
opts.optflagopt("", "profiler-trace-path",
"Path to dump a self-contained HTML timeline of profiler traces",
"");
opts.optflagopt("m", "memory-profile", "Memory profiler flag and output interval", "10");
opts.optflag("x", "exit", "Exit after load flag");
opts.optopt("y", "layout-threads", "Number of threads to use for layout", "1");
@ -656,6 +664,15 @@ pub fn from_cmdline_args(args: &[String]) -> ArgumentParsingResult {
period.parse().unwrap_or_else(|err| args_fail(&format!("Error parsing option: -p ({})", err)))
});
if let Some(ref time_profiler_trace_path) = opt_match.opt_str("profiler-trace-path") {
let mut path = PathBuf::from(time_profiler_trace_path);
path.pop();
if let Err(why) = fs::create_dir_all(&path) {
error!("Couldn't create/open {:?}: {:?}",
Path::new(time_profiler_trace_path).to_string_lossy(), why);
}
}
let mem_profiler_period = opt_match.opt_default("m", "5").map(|period| {
period.parse().unwrap_or_else(|err| args_fail(&format!("Error parsing option: -m ({})", err)))
});
@ -755,6 +772,7 @@ pub fn from_cmdline_args(args: &[String]) -> ArgumentParsingResult {
tile_size: tile_size,
device_pixels_per_px: device_pixels_per_px,
time_profiler_period: time_profiler_period,
time_profiler_trace_path: opt_match.opt_str("profiler-trace-path"),
mem_profiler_period: mem_profiler_period,
layout_threads: layout_threads,
nonincremental_layout: nonincremental_layout,