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Refactor common infrastructure for creating memory reports. (#36579)

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This removes a bunch of duplicated code needed to support
ConditionalMallocSizeOf correctly, and fixes multiple places where that
code was subtly wrong (the seen pointers hashset was never cleared).

Testing: Measuring https://www.nist.gov/image-gallery lots of times.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>
This commit is contained in:
Josh Matthews 2025-04-17 22:14:49 -04:00 • committed by GitHub
parent 2a81987590
commit 5e2d42e944
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GPG key ID: B5690EEEBB952194
11 changed files with 68 additions and 57 deletions
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19
components/net/image_cache.rs
View file

@ -2,10 +2,8 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
use std::cell::{LazyCell, RefCell};
use std::collections::HashMap;
use std::collections::hash_map::Entry::{Occupied, Vacant};
use std::collections::{HashMap, HashSet};
use std::ffi::c_void;
use std::sync::{Arc, Mutex};
use std::{mem, thread};
@ -460,15 +458,8 @@ impl ImageCache for ImageCacheImpl {
}
}
fn memory_report(&self, prefix: &str) -> Report {
let seen_pointer =
move |ptr| SEEN_POINTERS.with(|pointers| !pointers.borrow_mut().insert(ptr));
let mut ops = MallocSizeOfOps::new(
servo_allocator::usable_size,
None,
Some(Box::new(seen_pointer)),
);
let size = self.store.lock().unwrap().size_of(&mut ops);
fn memory_report(&self, prefix: &str, ops: &mut MallocSizeOfOps) -> Report {
let size = self.store.lock().unwrap().size_of(ops);
Report {
path: path![prefix, "image-cache"],
kind: ReportKind::ExplicitSystemHeapSize,
@ -678,7 +669,3 @@ impl ImageCacheImpl {
warn!("Couldn't find cached entry for listener {:?}", id);
}
}
thread_local!(static SEEN_POINTERS: LazyCell<RefCell<HashSet<*const c_void>>> = const {
LazyCell::new(|| RefCell::new(HashSet::new()))
});

14
components/net/resource_thread.rs
View file

@ -21,7 +21,6 @@ use embedder_traits::EmbedderProxy;
use hyper_serde::Serde;
use ipc_channel::ipc::{self, IpcReceiver, IpcReceiverSet, IpcSender};
use log::{debug, trace, warn};
use malloc_size_of::MallocSizeOfOps;
use net_traits::blob_url_store::parse_blob_url;
use net_traits::filemanager_thread::FileTokenCheck;
use net_traits::request::{Destination, RequestBuilder, RequestId};
@ -32,7 +31,9 @@ use net_traits::{
FetchChannels, FetchTaskTarget, ResourceFetchTiming, ResourceThreads, ResourceTimingType,
WebSocketDomAction, WebSocketNetworkEvent,
};
use profile_traits::mem::{ProcessReports, ProfilerChan as MemProfilerChan, ReportsChan};
use profile_traits::mem::{
ProcessReports, ProfilerChan as MemProfilerChan, ReportsChan, perform_memory_report,
};
use profile_traits::time::ProfilerChan;
use rustls::RootCertStore;
use serde::{Deserialize, Serialize};
@ -280,10 +281,11 @@ impl ResourceChannelManager {
public_http_state: &Arc<HttpState>,
private_http_state: &Arc<HttpState>,
) {
let mut ops = MallocSizeOfOps::new(servo_allocator::usable_size, None, None);
let mut reports = public_http_state.memory_reports("public", &mut ops);
reports.extend(private_http_state.memory_reports("private", &mut ops));
msg.send(ProcessReports::new(reports));
perform_memory_report(|ops| {
let mut reports = public_http_state.memory_reports("public", ops);
reports.extend(private_http_state.memory_reports("private", ops));
msg.send(ProcessReports::new(reports));
})
}
fn cancellation_listener(&self, request_id: RequestId) -> Option<Arc<CancellationListener>> {