[cpp_wrapper] Build main and kernel code in separate threads #154551
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🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/154551
Note: Links to docs will display an error until the docs builds have been completed. ✅ You can merge normally! (1 Unrelated Failure)As of commit 04c49e9 with merge base e785c08 ( UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:
This comment was automatically generated by Dr. CI and updates every 15 minutes. |
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benjaminglass1
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Jul 10, 2025
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| if _IS_WINDOWS: | ||
| # https://learn.microsoft.com/en-us/cpp/build/walkthrough-compile-a-c-program-on-the-command-line?view=msvc-1704 | ||
| # https://stackoverflow.com/a/31566153 | ||
| cmd = ( | ||
| f"{self._compiler} {self._include_dirs_args} {self._definitions_args} " | ||
| f"{self._cflags_args} {self._sources_args} " | ||
| f"{self._passthrough_parameters_args} {self._output}" | ||
| ) | ||
| if self._do_link: | ||
| cmd += ( | ||
| f" /LD /link {self._libraries_dirs_args} {self._libraries_args} " | ||
| f"{self._ldflags_args}" | ||
| ) | ||
| if self._do_link: | ||
| cmd += f" {ldflags_args} {libraries_args} {libraries_dirs_args}" | ||
| return cmd | ||
|
|
||
| command_line = format_build_command( | ||
| compiler=self._compiler, | ||
| sources=self._sources_args, | ||
| include_dirs_args=self._include_dirs_args, | ||
| definitions_args=self._definitions_args, | ||
| cflags_args=self._cflags_args, | ||
| ldflags_args=self._ldflags_args, | ||
| libraries_args=self._libraries_args, | ||
| libraries_dirs_args=self._libraries_dirs_args, | ||
| passthrough_args=self._passthrough_parameters_args, | ||
| output=self._output, | ||
| return normalize_path_separator(cmd) | ||
|
|
||
| cmd = ( | ||
| f"{self._compiler} {self._sources_args} {self._definitions_args} " | ||
| f"{self._cflags_args} {self._include_dirs_args} " | ||
| f"{self._passthrough_parameters_args} {self._output}" | ||
| ) | ||
| return command_line | ||
| if self._do_link: | ||
| cmd += ( | ||
| f" {self._ldflags_args} {self._libraries_args} " | ||
| f"{self._libraries_dirs_args}" | ||
| ) | ||
| return cmd |
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This is functionally neutral; it just removes an interior function that added extra indentation and was only called here.
benjaminglass1
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Jul 30, 2025
The main change of this commit is building cpp_wrapper code asynchronously, with a thread for the wrapper code, a thread for the kernel code, and a final thread to link. This improves build speeds, even while enabling an LTO link to improve performance. Additionally, significantly reduce the cold-start time for detecting compatible precompiled headers. We had accidentally preprocessed the underlying header in -O3, which is deeply unnecessary to simply detect content changes. ghstack-source-id: ad74c56 Pull Request resolved: #154551
benjaminglass1
added a commit
that referenced
this pull request
Jul 30, 2025
The main change of this commit is building cpp_wrapper code asynchronously, with a thread for the wrapper code, a thread for the kernel code, and a final thread to link. This improves build speeds, even while enabling an LTO link to improve performance. Additionally, significantly reduce the cold-start time for detecting compatible precompiled headers. We had accidentally preprocessed the underlying header in -O3, which is deeply unnecessary to simply detect content changes. ghstack-source-id: ad74c56 Pull Request resolved: #154551
|
Looks like this PR hasn't been updated in a while so we're going to go ahead and mark this as |
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Stack from ghstack (oldest at bottom):
The main change of this commit is building
cpp_wrappercode asynchronously, with a thread for the wrapper code, a thread for the kernel code, and a final thread to link. This improves build speeds, even while enabling an LTO link to improve performance.Additionally, significantly reduce the cold-start time for detecting compatible precompiled headers. We had accidentally preprocessed the underlying header in
-O3, which is deeply unnecessary to simply detect content changes.cc @voznesenskym @penguinwu @EikanWang @jgong5 @Guobing-Chen @XiaobingSuper @zhuhaozhe @blzheng @wenzhe-nrv @jiayisunx @ipiszy @chenyang78 @kadeng @muchulee8 @amjames @chauhang @aakhundov @coconutruben @Lucaskabela