Alexander Markov
058265f4e7
This is a reland of commit 6b3d1752fa
Fixes b/235734143
TEST=runtime/tests/vm/dart/await_in_custom_zone_test.dart
Original change's description:
> [vm] More efficient 'await' of not Future and completed _Future
>
> When awaiting a value which is not a Future or a completed
> built-in _Future, 'await' implementation can bypass heavyweight
> _Future/_FutureListener machinery and schedule micro-tasks directly.
>
> Benchmarks:
> JIT, x64:
> AsyncLiveVars.* +46-54% (bigger is better)
> Calls.AwaitAsyncCall -46% (less is better)
> Calls.AwaitAsyncCallInstanceTargetPolymorphic -46%
> Calls.AwaitAsyncCallClosureTargetPolymorphic -45%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphicManyAwaits -45%
> Calls.AwaitFutureOrCall -60%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphic -60%
> Calls.AwaitFutureOrCallClosureTargetPolymorphic -59%
>
> JIT, ia32:
> AsyncLiveVars.* +43-52% (bigger is better)
> Calls.AwaitAsyncCall -42% (less is better)
> Calls.AwaitAsyncCallInstanceTargetPolymorphic -42%
> Calls.AwaitAsyncCallClosureTargetPolymorphic -41%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphicManyAwaits -39%
> Calls.AwaitFutureOrCall -55%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphic -54%
> Calls.AwaitFutureOrCallClosureTargetPolymorphic -53%
>
> JIT, arm:
> AsyncLiveVars.* +64-71% (bigger is better)
> Calls.AwaitAsyncCallInstanceTargetPolymorphic -51% (less is better)
> Calls.AwaitAsyncCallClosureTargetPolymorphic -47%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphicManyAwaits -48%
> Calls.AwaitFutureOrCall -64%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphic -64%
> Calls.AwaitFutureOrCallClosureTargetPolymorphic -59%
>
> JIT, arm64:
> AsyncLiveVars.* +65-78% (bigger is better)
> Calls.AwaitAsyncCall -51% (less is better)
> Calls.AwaitAsyncCallInstanceTargetPolymorphic -51%
> Calls.AwaitAsyncCallClosureTargetPolymorphic -50%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphicManyAwaits -49%
> Calls.AwaitFutureOrCall -69%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphic -68%
> Calls.AwaitFutureOrCallClosureTargetPolymorphic -67%
>
> AOT, x64:
> AsyncLiveVars.* +55-61% (bigger is better)
> Calls.AwaitAsyncCall -47% (less is better)
> Calls.AwaitAsyncCallInstanceTargetPolymorphic -46%
> Calls.AwaitAsyncCallClosureTargetPolymorphic -47%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphicManyAwaits -46%
> Calls.AwaitFutureOrCall -59%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphic -59%
> Calls.AwaitFutureOrCallClosureTargetPolymorphic -58%
>
> AOT, arm:
> AsyncLiveVars.* 54-66% (bigger is better)
> Calls.AwaitAsyncCall -46-51% (less is better)
> Calls.AwaitAsyncCallInstanceTargetPolymorphic -46-50%
> Calls.AwaitAsyncCallClosureTargetPolymorphic -46-52%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphicManyAwaits -45-50%
> Calls.AwaitFutureOrCall -63-68%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphic -63-66%
> Calls.AwaitFutureOrCallClosureTargetPolymorphic -63-67%
>
> AOT, arm64:
> AsyncLiveVars.* +53-66% (bigger is better)
> Calls.AwaitAsyncCall -50-51% (less is better)
> Calls.AwaitAsyncCallInstanceTargetPolymorphic -50%
> Calls.AwaitAsyncCallClosureTargetPolymorphic -50-51%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphicManyAwaits -49-50%
> Calls.AwaitFutureOrCall -66-68%
> Calls.AwaitFutureOrCallInstanceTargetPolymorphic -66-68%
> Calls.AwaitFutureOrCallClosureTargetPolymorphic -63-67%
>
> TEST=ci
> Issue: https://github.com/dart-lang/sdk/issues/48378
>
> Change-Id: I65e3702fcd816ee3fee876ff442b9887c035b1ec
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/243102
> Reviewed-by: Lasse Nielsen <lrn@google.com>
> Commit-Queue: Alexander Markov <alexmarkov@google.com>
Change-Id: I245984ace1c768fdcba58dfdd6aa46e52126be4e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/248442
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Lasse Nielsen <lrn@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
Dart VM Compilation Pipeline
This folder contains Dart VM compilation pipeline.
Compilation pipeline is mainly responsible for converting AST or Kernel AST into IL flow graphs and then generating native code from IL.
It has the following structure:
| Directory | What goes there |
|---|---|
assembler/ |
Assemblers and disassemblers |
backend/ |
IL based compilation backend: optimization passes and architecture specific code generation rules |
frontend/ |
Frontends responsible for converting AST into IL |
jit/ |
JIT specific passes and compilation pipeline entry points |
aot/ |
AOT specific passes and compilation pipeline entry points |
. |
Shared code or code without clear designation. |
Currently there are no layering restrictions and components from different subfolders can reference each other.