compiletest: Run tests in their own thread to avoid blocking the schedul... #8531
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| run_metrics(config, testfile, &mut _mm); | ||
| let config = Cell::new(config); | ||
| let testfile = Cell::new(testfile); | ||
| // XXX: Creating another thread to run the test because this |
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Could this be tagged with 6436?
…duler The calls to waitpid are interacting badly with the message passing that goes on between schedulers and causing us to have very little parallelism in the test suite. I don't fully understand the sequence of events that causes the problem here but clearly blocking on waitpid is something that a well-behaved task should not be doing. Unfortunately this adds quite a bit of overhead to each test: one thread, two tasks, three stacks, so there's a tradeoff. The time to execute run-pass on my 4-core machine goes from ~750s to ~300s.
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@alexcrichton yes, done. @graydon yes, this should not be a problem when we use libuv's async process spawning. Note that reverting work stealing also added parellelism back to compiletest, something that I wouldn't expect if the problem is waitpid blocking scheduler message passing. Perhaps though work stealing is sending messages in different patterns that are not being responded to in a timely way. |
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...er I believe the calls to waitpid are interacting badly with the message passing that goes on between schedulers and causing us to have very little parallelism in the test suite. I don't fully understand the sequence of events that causes the problem here but clearly blocking on waitpid is something that a well-behaved task should not be doing. Unfortunately this adds quite a bit of overhead to each test: one thread, two tasks, three stacks, so there's a tradeoff. The time to execute run-pass on my 4-core machine goes from ~750s to ~300s. This should have a pretty good impact on cycle times. cc @toddaaro
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…t-edit, r=Veykril feat: Support multiple tab stops for completions in VSCode Uses the native VSCode support for `SnippetTextEdit`s. Fixes rust-lang#13229 and fixes rust-lang#8531. https://github.com/rust-lang/rust-analyzer/assets/13354275/a2d2c033-bb30-4f34-92ca-bf3f4f744cdc This is done in a slightly hacky way, as `vscode-languageclient` can't convert RA's `SnippetTextEdit`s into vscode `SnippetTextEdit`s and will appear to use a [different format](https://github.com/microsoft/vscode-languageserver-node/blob/295aaa393fda8ecce110c38880a00466b9320e63/types/src/main.ts#L1501-L1516) in the future. --- ~~Marked as draft since as-is, this will cause completions to double-indent any multi-line code generated.~~ **Update:** This also fixes up edits so that any multi-line code won't be double-indented.
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...er
I believe the calls to waitpid are interacting badly with the message passing that goes
on between schedulers and causing us to have very little parallelism in
the test suite. I don't fully understand the sequence of events that causes
the problem here but clearly blocking on waitpid is something that a
well-behaved task should not be doing.
Unfortunately this adds quite a bit of overhead to each test: one thread, two
tasks, three stacks, so there's a tradeoff. The time to execute run-pass on
my 4-core machine goes from ~750s to ~300s.
This should have a pretty good impact on cycle times.
cc @toddaaro