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Merge pull request #1489 from rust-lang/parallel_rustc

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Translate MIR to clif ir in parallel with parallel rustc
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bjorn3 2024-05-11 22:13:39 +02:00 committed by GitHub
commit 1a2c489a93
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GPG Key ID: B5690EEEBB952194
2 changed files with 37 additions and 49 deletions
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21
src/concurrency_limiter.rs
View File

@ -6,7 +6,7 @@
// FIXME don't panic when a worker thread panics
pub(super) struct ConcurrencyLimiter {
helper_thread: Option<HelperThread>,
helper_thread: Option<Mutex<HelperThread>>,
state: Arc<Mutex<state::ConcurrencyLimiterState>>,
available_token_condvar: Arc<Condvar>,
finished: bool,
@ -39,14 +39,14 @@ pub(super) fn new(sess: &Session, pending_jobs: usize) -> Self {
})
.unwrap();
ConcurrencyLimiter {
helper_thread: Some(helper_thread),
helper_thread: Some(Mutex::new(helper_thread)),
state,
available_token_condvar,
finished: false,
}
}
pub(super) fn acquire(&mut self, dcx: &rustc_errors::DiagCtxt) -> ConcurrencyLimiterToken {
pub(super) fn acquire(&self, dcx: &rustc_errors::DiagCtxt) -> ConcurrencyLimiterToken {
let mut state = self.state.lock().unwrap();
loop {
state.assert_invariants();
@ -73,16 +73,11 @@ pub(super) fn acquire(&mut self, dcx: &rustc_errors::DiagCtxt) -> ConcurrencyLim
}
}
self.helper_thread.as_mut().unwrap().request_token();
self.helper_thread.as_ref().unwrap().lock().unwrap().request_token();
state = self.available_token_condvar.wait(state).unwrap();
}
}
pub(super) fn job_already_done(&mut self) {
let mut state = self.state.lock().unwrap();
state.job_already_done();
}
pub(crate) fn finished(mut self) {
self.helper_thread.take();
@ -190,14 +185,6 @@ pub(super) fn job_finished(&mut self) {
self.assert_invariants();
}
pub(super) fn job_already_done(&mut self) {
self.assert_invariants();
self.pending_jobs -= 1;
self.assert_invariants();
self.drop_excess_capacity();
self.assert_invariants();
}
pub(super) fn poison(&mut self, error: String) {
self.poisoned = true;
self.stored_error = Some(error);

35
src/driver/aot.rs
View File

@ -15,6 +15,7 @@
use rustc_codegen_ssa::{CodegenResults, CompiledModule, CrateInfo, ModuleKind};
use rustc_data_structures::profiling::SelfProfilerRef;
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use rustc_data_structures::sync::{par_map, IntoDynSyncSend};
use rustc_metadata::fs::copy_to_stdout;
use rustc_metadata::EncodedMetadata;
use rustc_middle::dep_graph::{WorkProduct, WorkProductId};
@ -604,16 +605,17 @@ pub(crate) fn run_aot(
let global_asm_config = Arc::new(crate::global_asm::GlobalAsmConfig::new(tcx));
let mut concurrency_limiter = ConcurrencyLimiter::new(tcx.sess, cgus.len());
let (todo_cgus, done_cgus) =
cgus.into_iter().enumerate().partition::<Vec<_>, _>(|&(i, _)| match cgu_reuse[i] {
_ if backend_config.disable_incr_cache => true,
CguReuse::No => true,
CguReuse::PreLto | CguReuse::PostLto => false,
});
let concurrency_limiter = IntoDynSyncSend(ConcurrencyLimiter::new(tcx.sess, todo_cgus.len()));
let modules = tcx.sess.time("codegen mono items", || {
cgus.iter()
.enumerate()
.map(|(i, cgu)| {
let cgu_reuse =
if backend_config.disable_incr_cache { CguReuse::No } else { cgu_reuse[i] };
match cgu_reuse {
CguReuse::No => {
let mut modules: Vec<_> = par_map(todo_cgus, |(_, cgu)| {
let dep_node = cgu.codegen_dep_node(tcx);
tcx.dep_graph
.with_task(
@ -629,14 +631,13 @@ pub(crate) fn run_aot(
Some(rustc_middle::dep_graph::hash_result),
)
.0
}
CguReuse::PreLto | CguReuse::PostLto => {
concurrency_limiter.job_already_done();
OngoingModuleCodegen::Sync(reuse_workproduct_for_cgu(tcx, cgu))
}
}
})
.collect::<Vec<_>>()
});
modules.extend(
done_cgus
.into_iter()
.map(|(_, cgu)| OngoingModuleCodegen::Sync(reuse_workproduct_for_cgu(tcx, cgu))),
);
modules
});
let mut allocator_module = make_module(tcx.sess, &backend_config, "allocator_shim".to_string());
@ -705,6 +706,6 @@ pub(crate) fn run_aot(
metadata_module,
metadata,
crate_info: CrateInfo::new(tcx, target_cpu),
concurrency_limiter,
concurrency_limiter: concurrency_limiter.0,
})
}