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Heartbeats support for Android.

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Add debug option to enable heartbeats for all profiler categories.
This commit is contained in:
Connor Imes 2015-10-29 12:18:43 -05:00
parent 965fbbd99f
commit bb7e5375a0
2 changed files with 57 additions and 14 deletions
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58
components/profile/heartbeats.rs
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@ -11,6 +11,8 @@ use std::env::var_os;
use std::error::Error;
use std::fs::File;
use std::mem;
use std::path::Path;
use util::opts;
static mut HBS: Option<*mut HashMap<ProfilerCategory, Heartbeat>> = None;
@ -72,6 +74,7 @@ pub fn cleanup() {
}
}
/// Check if a heartbeat exists for the given category
pub fn is_heartbeat_enabled(category: &ProfilerCategory) -> bool {
unsafe {
HBS.map_or(false, |m| (*m).contains_key(category))
@ -93,22 +96,51 @@ pub fn maybe_heartbeat(category: &ProfilerCategory,
}
}
/// Create a heartbeat if the correct environment variable is set
// TODO(cimes): Android doesn't really do environment variables. Need a better way to configure dynamically.
fn is_create_heartbeat(category: &ProfilerCategory) -> bool {
opts::get().profile_heartbeats || var_os(format!("SERVO_HEARTBEAT_ENABLE_{:?}", category)).is_some()
}
fn open_heartbeat_log<P: AsRef<Path>>(name: P) -> Option<File> {
match File::create(name) {
Ok(f) => Some(f),
Err(e) => {
warn!("Failed to open heartbeat log: {}", Error::description(&e));
None
},
}
}
#[cfg(target_os = "android")]
fn get_heartbeat_log(category: &ProfilerCategory) -> Option<File> {
open_heartbeat_log(format!("/sdcard/servo/heartbeat-{:?}.log", category))
}
#[cfg(not(target_os = "android"))]
fn get_heartbeat_log(category: &ProfilerCategory) -> Option<File> {
var_os(format!("SERVO_HEARTBEAT_LOG_{:?}", category)).and_then(|name| open_heartbeat_log(&name))
}
fn get_heartbeat_window_size(category: &ProfilerCategory) -> usize {
const WINDOW_SIZE_DEFAULT: usize = 1;
match var_os(format!("SERVO_HEARTBEAT_WINDOW_{:?}", category)) {
Some(w) => match w.into_string() {
Ok(s) => s.parse::<usize>().unwrap_or(WINDOW_SIZE_DEFAULT),
_ => WINDOW_SIZE_DEFAULT,
},
None => WINDOW_SIZE_DEFAULT,
}
}
/// Possibly create a heartbeat
fn maybe_create_heartbeat(hbs: &mut HashMap<ProfilerCategory, Heartbeat>,
category: ProfilerCategory) {
static WINDOW_SIZE_DEFAULT: usize = 20;
if let Some(_) = var_os(format!("SERVO_HEARTBEAT_ENABLE_{:?}", category)) {
if is_create_heartbeat(&category) {
// get optional log file
let logfile: Option<File> = var_os(format!("SERVO_HEARTBEAT_LOG_{:?}", category))
.and_then(|name| File::create(name).ok());
// get window size
let window_size: usize = match var_os(format!("SERVO_HEARTBEAT_WINDOW_{:?}", category)) {
Some(w) => match w.into_string() {
Ok(s) => s.parse::<usize>().unwrap_or(WINDOW_SIZE_DEFAULT),
_ => WINDOW_SIZE_DEFAULT,
},
None => WINDOW_SIZE_DEFAULT,
};
let logfile: Option<File> = get_heartbeat_log(&category);
// window size
let window_size: usize = get_heartbeat_window_size(&category);
// create the heartbeat
match Heartbeat::new(window_size, Some(heartbeat_window_callback), logfile) {
Ok(hb) => {