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This captures time spent blocked when a query is waiting for another
query to finish executing in another thread.
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Timing data and cache hits/misses are now recorded at the query level.
This allows us to show detailed per query information such as total time
for each query.
To see detailed query information in the summary pass the `-Z verbose`
flag. For example:
```
rustc -Z self-profile -Z verbose hello_world.rs
```
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std: Force `Instant::now()` to be monotonic
This commit is an attempt to force `Instant::now` to be monotonic
through any means possible. We tried relying on OS/hardware/clock
implementations, but those seem buggy enough that we can't rely on them
in practice. This commit implements the same hammer Firefox recently
implemented (noted in #56612) which is to just keep whatever the lastest
`Instant::now()` return value was in memory, returning that instead of
the OS looks like it's moving backwards.
Closes #48514
Closes #49281
cc #51648
cc #56560
Closes #56612
Closes #56940
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This commit is an attempt to force `Instant::now` to be monotonic
through any means possible. We tried relying on OS/hardware/clock
implementations, but those seem buggy enough that we can't rely on them
in practice. This commit implements the same hammer Firefox recently
implemented (noted in #56612) which is to just keep whatever the lastest
`Instant::now()` return value was in memory, returning that instead of
the OS looks like it's moving backwards.
Closes #48514
Closes #49281
cc #51648
cc #56560
Closes #56612
Closes #56940
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This makes it possible to run with RUSTFLAGS="-Zself-profile" without
having to redirect compiler output; otherwise Cargo will error out due
to non-empty compiler stdout.
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Fix self profiler ICE on Windows
Fixes #51648
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On Windows, the high-resolution timestamp api doesn't seem to always be
monotonic. This can cause panics when the self-profiler uses the
`Instant` api to find elapsed time.
Work around this by detecting the case where now is less than the start
time and just use 0 elapsed ticks as the measurement.
Fixes #51648
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Fix missing ',' array element separators and convert NaN's to 0.
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This seemed like a good way to kick the tires on the
elided-lifetimes-in-paths lint (#52069)—seems to work! This was also
pretty tedious—it sure would be nice if `cargo fix` worked on this
codebase (#53896)!
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`bad_style` is being deprecated in favor of `nonstandard_style`:
- https://github.com/rust-lang/rust/issues/41646
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or "".into()
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