Various memory measurement improvements (#36834)

The two significant changes here are 1) a commit that frees memory used
to perform memory reporting once the reporting is complete, 2) memory
reporting for the system font service. There are various other commits
that remove `#[ignore_malloc_size_of]` attributes for data that we are
now able to measure, but they do not significantly change our
measurements when testing servo.org.

Testing: Comparing the output of about:memory on servo.org.

---------

Signed-off-by: Josh Matthews <josh@joshmatthews.net>
This commit is contained in:
Josh Matthews 2025-05-07 00:00:12 -04:00 committed by GitHub
parent e9f364ef51
commit ba8f923201
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GPG key ID: B5690EEEBB952194
19 changed files with 135 additions and 49 deletions

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@ -5,8 +5,8 @@
use std::collections::HashMap;
use std::sync::Arc;
use atomic_refcell::AtomicRefCell;
use log::warn;
use malloc_size_of_derive::MallocSizeOf;
use parking_lot::RwLock;
use style::stylesheets::DocumentStyleSheet;
use style::values::computed::{FontStyle, FontWeight};
@ -15,7 +15,7 @@ use crate::font::FontDescriptor;
use crate::font_template::{FontTemplate, FontTemplateRef, FontTemplateRefMethods, IsOblique};
use crate::system_font_service::{FontIdentifier, LowercaseFontFamilyName};
#[derive(Default)]
#[derive(Default, MallocSizeOf)]
pub struct FontStore {
pub(crate) families: HashMap<LowercaseFontFamilyName, FontTemplates>,
web_fonts_loading_for_stylesheets: Vec<(DocumentStyleSheet, usize)>,
@ -134,7 +134,7 @@ impl FontStore {
///
/// This optimization is taken from:
/// <https://searchfox.org/mozilla-central/source/gfx/thebes/gfxFontEntry.cpp>.
#[derive(Clone, Debug, Default)]
#[derive(Clone, Debug, Default, MallocSizeOf)]
struct SimpleFamily {
regular: Option<FontTemplateRef>,
bold: Option<FontTemplateRef>,
@ -190,7 +190,7 @@ impl SimpleFamily {
}
}
/// A list of font templates that make up a given font family.
#[derive(Clone, Debug)]
#[derive(Clone, Debug, MallocSizeOf)]
pub struct FontTemplates {
pub(crate) templates: Vec<FontTemplateRef>,
simple_family: Option<SimpleFamily>,
@ -263,7 +263,7 @@ impl FontTemplates {
}
}
let new_template = Arc::new(AtomicRefCell::new(new_template));
let new_template = FontTemplateRef::new(new_template);
self.templates.push(new_template.clone());
self.update_simple_family(new_template);
}