[llvm] Windows: use EcoQoS for ThreadPriority::Background (PR #148797)

via llvm-commits llvm-commits at lists.llvm.org
Wed Jul 23 09:53:52 PDT 2025


github-actions[bot] wrote:

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You can test this locally with the following command:
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git-clang-format --diff HEAD~1 HEAD --extensions inc -- llvm/lib/Support/Windows/Threading.inc
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View the diff from clang-format here.
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diff --git a/llvm/lib/Support/Windows/Threading.inc b/llvm/lib/Support/Windows/Threading.inc
index 571e0960a..a405ebdf9 100644
--- a/llvm/lib/Support/Windows/Threading.inc
+++ b/llvm/lib/Support/Windows/Threading.inc
@@ -108,8 +108,8 @@ void llvm::get_thread_name(SmallVectorImpl<char> &Name) {
 
 SetThreadPriorityResult llvm::set_thread_priority(ThreadPriority Priority) {
 
-  // SetThreadInformation is only available on Windows 8 and later. Since we still
-  // support compilation on Windows 7, we load the function dynamically.
+  // SetThreadInformation is only available on Windows 8 and later. Since we
+  // still support compilation on Windows 7, we load the function dynamically.
   typedef BOOL(WINAPI * SetThreadInformation_t)(
       HANDLE hThread, THREAD_INFORMATION_CLASS ThreadInformationClass,
       _In_reads_bytes_(ThreadInformationSize) PVOID ThreadInformation,
@@ -132,8 +132,9 @@ SetThreadPriorityResult llvm::set_thread_priority(ThreadPriority Priority) {
     // efficent cores at the most efficient cpu frequency):
     // https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-setthreadinformation
     // https://learn.microsoft.com/en-us/windows/win32/procthread/quality-of-service
-    setThreadInformation(Priority == ThreadPriority::Background ? THREAD_POWER_THROTTLING_EXECUTION_SPEED
-                                                                : 0);
+    setThreadInformation(Priority == ThreadPriority::Background
+                             ? THREAD_POWER_THROTTLING_EXECUTION_SPEED
+                             : 0);
   }
 
   // https://docs.microsoft.com/en-us/windows/desktop/api/processthreadsapi/nf-processthreadsapi-setthreadpriority

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https://github.com/llvm/llvm-project/pull/148797


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