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Merge #10088

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10088: feat: improve CPU usage r=matklad a=matklad



Co-authored-by: Aleksey Kladov <aleksey.kladov@gmail.com>
This commit is contained in:
bors[bot] 2021-08-30 16:49:13 +00:00 committed by GitHub
commit 5c704f11d2
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4 changed files with 99 additions and 99 deletions
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25
crates/ide/src/prime_caches.rs
View file

@ -8,17 +8,12 @@ use ide_db::base_db::SourceDatabase;
use crate::RootDatabase;
/// We started indexing a crate.
#[derive(Debug)]
pub enum PrimeCachesProgress {
Started,
/// We started indexing a crate.
StartedOnCrate {
on_crate: String,
n_done: usize,
n_total: usize,
},
/// We finished indexing all crates.
Finished,
pub struct PrimeCachesProgress {
pub on_crate: String,
pub n_done: usize,
pub n_total: usize,
}
pub(crate) fn prime_caches(db: &RootDatabase, cb: &(dyn Fn(PrimeCachesProgress) + Sync)) {
@ -26,21 +21,13 @@ pub(crate) fn prime_caches(db: &RootDatabase, cb: &(dyn Fn(PrimeCachesProgress)
let graph = db.crate_graph();
let topo = &graph.crates_in_topological_order();
cb(PrimeCachesProgress::Started);
// Take care to emit the finish signal even when the computation is canceled.
let _d = stdx::defer(|| cb(PrimeCachesProgress::Finished));
// FIXME: This would be easy to parallelize, since it's in the ideal ordering for that.
// Unfortunately rayon prevents panics from propagation out of a `scope`, which breaks
// cancellation, so we cannot use rayon.
for (i, &crate_id) in topo.iter().enumerate() {
let crate_name = graph[crate_id].display_name.as_deref().unwrap_or_default().to_string();
cb(PrimeCachesProgress::StartedOnCrate {
on_crate: crate_name,
n_done: i,
n_total: topo.len(),
});
cb(PrimeCachesProgress { on_crate: crate_name, n_done: i, n_total: topo.len() });
db.crate_def_map(crate_id);
db.import_map(crate_id);
}

105
crates/rust-analyzer/src/main_loop.rs
View file

@ -8,11 +8,10 @@ use std::{
use always_assert::always;
use crossbeam_channel::{select, Receiver};
use ide::{FileId, PrimeCachesProgress};
use ide_db::base_db::{SourceDatabaseExt, VfsPath};
use lsp_server::{Connection, Notification, Request};
use lsp_types::notification::Notification as _;
use vfs::ChangeKind;
use vfs::{ChangeKind, FileId};
use crate::{
config::Config,
@ -67,6 +66,13 @@ pub(crate) enum Task {
FetchBuildData(BuildDataProgress),
}
#[derive(Debug)]
pub(crate) enum PrimeCachesProgress {
Begin,
Report(ide::PrimeCachesProgress),
End { cancelled: bool },
}
impl fmt::Debug for Event {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let debug_verbose_not = |not: &Notification, f: &mut fmt::Formatter| {
@ -146,8 +152,10 @@ impl GlobalState {
);
}
self.fetch_workspaces_request();
self.fetch_workspaces_if_needed();
self.fetch_workspaces_queue.request_op();
if self.fetch_workspaces_queue.should_start_op() {
self.fetch_workspaces();
}
while let Some(event) = self.next_event(&inbox) {
if let Event::Lsp(lsp_server::Message::Notification(not)) = &event {
@ -209,17 +217,17 @@ impl GlobalState {
}
}
Task::PrimeCaches(progress) => match progress {
PrimeCachesProgress::Started => prime_caches_progress.push(progress),
PrimeCachesProgress::StartedOnCrate { .. } => {
PrimeCachesProgress::Begin => prime_caches_progress.push(progress),
PrimeCachesProgress::Report(_) => {
match prime_caches_progress.last_mut() {
Some(last @ PrimeCachesProgress::StartedOnCrate { .. }) => {
Some(last @ PrimeCachesProgress::Report(_)) => {
// Coalesce subsequent update events.
*last = progress;
}
_ => prime_caches_progress.push(progress),
}
}
PrimeCachesProgress::Finished => prime_caches_progress.push(progress),
PrimeCachesProgress::End { .. } => prime_caches_progress.push(progress),
},
Task::FetchWorkspace(progress) => {
let (state, msg) = match progress {
@ -228,14 +236,14 @@ impl GlobalState {
(Progress::Report, Some(msg))
}
ProjectWorkspaceProgress::End(workspaces) => {
self.fetch_workspaces_completed(workspaces);
self.fetch_workspaces_queue.op_completed(workspaces);
let old = Arc::clone(&self.workspaces);
self.switch_workspaces();
let workspaces_updated = !Arc::ptr_eq(&old, &self.workspaces);
if self.config.run_build_scripts() && workspaces_updated {
self.fetch_build_data_request()
self.fetch_build_data_queue.request_op()
}
(Progress::End, None)
@ -251,7 +259,7 @@ impl GlobalState {
(Some(Progress::Report), Some(msg))
}
BuildDataProgress::End(build_data_result) => {
self.fetch_build_data_completed(build_data_result);
self.fetch_build_data_queue.op_completed(build_data_result);
self.switch_workspaces();
@ -275,22 +283,28 @@ impl GlobalState {
for progress in prime_caches_progress {
let (state, message, fraction);
match progress {
PrimeCachesProgress::Started => {
PrimeCachesProgress::Begin => {
state = Progress::Begin;
message = None;
fraction = 0.0;
}
PrimeCachesProgress::StartedOnCrate { on_crate, n_done, n_total } => {
PrimeCachesProgress::Report(report) => {
state = Progress::Report;
message = Some(format!("{}/{} ({})", n_done, n_total, on_crate));
fraction = Progress::fraction(n_done, n_total);
message = Some(format!(
"{}/{} ({})",
report.n_done, report.n_total, report.on_crate
));
fraction = Progress::fraction(report.n_done, report.n_total);
}
PrimeCachesProgress::Finished => {
PrimeCachesProgress::End { cancelled } => {
state = Progress::End;
message = None;
fraction = 1.0;
self.prime_caches_queue.op_completed(());
if cancelled {
self.prime_caches_queue.request_op();
}
}
};
@ -413,26 +427,10 @@ impl GlobalState {
for flycheck in &self.flycheck {
flycheck.update();
}
self.prime_caches_queue.request_op();
}
if !was_quiescent || state_changed {
// Ensure that only one cache priming task can run at a time
self.prime_caches_queue.request_op();
if self.prime_caches_queue.should_start_op() {
self.task_pool.handle.spawn_with_sender({
let analysis = self.snapshot().analysis;
move |sender| {
let cb = |progress| {
sender.send(Task::PrimeCaches(progress)).unwrap();
};
match analysis.prime_caches(cb) {
Ok(()) => (),
Err(_canceled) => (),
}
}
});
}
// Refresh semantic tokens if the client supports it.
if self.config.semantic_tokens_refresh() {
self.semantic_tokens_cache.lock().clear();
@ -478,11 +476,43 @@ impl GlobalState {
}
if self.config.cargo_autoreload() {
self.fetch_workspaces_if_needed();
if self.fetch_workspaces_queue.should_start_op() {
self.fetch_workspaces();
}
}
if self.fetch_build_data_queue.should_start_op() {
self.fetch_build_data();
}
if self.prime_caches_queue.should_start_op() {
self.task_pool.handle.spawn_with_sender({
let analysis = self.snapshot().analysis;
move |sender| {
sender.send(Task::PrimeCaches(PrimeCachesProgress::Begin)).unwrap();
let res = analysis.prime_caches(|progress| {
let report = PrimeCachesProgress::Report(progress);
sender.send(Task::PrimeCaches(report)).unwrap();
});
sender
.send(Task::PrimeCaches(PrimeCachesProgress::End {
cancelled: res.is_err(),
}))
.unwrap();
}
});
}
self.fetch_build_data_if_needed();
self.report_new_status_if_needed();
let status = self.current_status();
if self.last_reported_status.as_ref() != Some(&status) {
self.last_reported_status = Some(status.clone());
if let (lsp_ext::Health::Error, Some(message)) = (status.health, &status.message) {
self.show_message(lsp_types::MessageType::Error, message.clone());
}
if self.config.server_status_notification() {
self.send_notification::<lsp_ext::ServerStatusNotification>(status);
}
}
let loop_duration = loop_start.elapsed();
if loop_duration > Duration::from_millis(100) {
@ -521,8 +551,7 @@ impl GlobalState {
RequestDispatcher { req: Some(req), global_state: self }
.on_sync_mut::<lsp_ext::ReloadWorkspace>(|s, ()| {
s.fetch_workspaces_request();
s.fetch_workspaces_if_needed();
s.fetch_workspaces_queue.request_op();
Ok(())
})?
.on_sync_mut::<lsp_types::request::Shutdown>(|s, ()| {

49
crates/rust-analyzer/src/reload.rs
View file

@ -47,7 +47,7 @@ impl GlobalState {
self.analysis_host.update_lru_capacity(self.config.lru_capacity());
}
if self.config.linked_projects() != old_config.linked_projects() {
self.fetch_workspaces_request()
self.fetch_workspaces_queue.request_op()
} else if self.config.flycheck() != old_config.flycheck() {
self.reload_flycheck();
}
@ -71,7 +71,7 @@ impl GlobalState {
", "
)
);
self.fetch_workspaces_request();
self.fetch_workspaces_queue.request_op();
fn is_interesting(path: &AbsPath, change_kind: ChangeKind) -> bool {
const IMPLICIT_TARGET_FILES: &[&str] = &["build.rs", "src/main.rs", "src/lib.rs"];
@ -109,7 +109,8 @@ impl GlobalState {
false
}
}
pub(crate) fn report_new_status_if_needed(&mut self) {
pub(crate) fn current_status(&self) -> lsp_ext::ServerStatusParams {
let mut status = lsp_ext::ServerStatusParams {
health: lsp_ext::Health::Ok,
quiescent: self.is_quiescent(),
@ -132,27 +133,10 @@ impl GlobalState {
status.health = lsp_ext::Health::Error;
status.message = Some(error)
}
if self.last_reported_status.as_ref() != Some(&status) {
self.last_reported_status = Some(status.clone());
if let (lsp_ext::Health::Error, Some(message)) = (status.health, &status.message) {
self.show_message(lsp_types::MessageType::Error, message.clone());
}
if self.config.server_status_notification() {
self.send_notification::<lsp_ext::ServerStatusNotification>(status);
}
}
status
}
pub(crate) fn fetch_workspaces_request(&mut self) {
self.fetch_workspaces_queue.request_op()
}
pub(crate) fn fetch_workspaces_if_needed(&mut self) {
if !self.fetch_workspaces_queue.should_start_op() {
return;
}
pub(crate) fn fetch_workspaces(&mut self) {
tracing::info!("will fetch workspaces");
self.task_pool.handle.spawn_with_sender({
@ -203,21 +187,8 @@ impl GlobalState {
}
});
}
pub(crate) fn fetch_workspaces_completed(
&mut self,
workspaces: Vec<anyhow::Result<ProjectWorkspace>>,
) {
self.fetch_workspaces_queue.op_completed(workspaces)
}
pub(crate) fn fetch_build_data_request(&mut self) {
self.fetch_build_data_queue.request_op();
}
pub(crate) fn fetch_build_data_if_needed(&mut self) {
if !self.fetch_build_data_queue.should_start_op() {
return;
}
pub(crate) fn fetch_build_data(&mut self) {
let workspaces = Arc::clone(&self.workspaces);
let config = self.config.cargo();
self.task_pool.handle.spawn_with_sender(move |sender| {
@ -236,12 +207,6 @@ impl GlobalState {
sender.send(Task::FetchBuildData(BuildDataProgress::End((workspaces, res)))).unwrap();
});
}
pub(crate) fn fetch_build_data_completed(
&mut self,
build_data: (Arc<Vec<ProjectWorkspace>>, Vec<anyhow::Result<WorkspaceBuildScripts>>),
) {
self.fetch_build_data_queue.op_completed(build_data)
}
pub(crate) fn switch_workspaces(&mut self) {
let _p = profile::span("GlobalState::switch_workspaces");

19
docs/dev/style.md
View file

@ -257,6 +257,25 @@ if idx >= len {
**Rationale:** it's useful to see the invariant relied upon by the rest of the function clearly spelled out.
## Control Flow
As a special case of the previous rule, do not hide control flow inside functions, push it to the caller:
```rust
// GOOD
if cond {
f()
}
// BAD
fn f() {
if !cond {
return;
}
...
}
```
## Assertions
Assert liberally.