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See and use more than 64 CPUs on Windows #25087

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See and use more than 64 CPUs on Windows #25087

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8216905
See and use more than 64 CPUs on Windows
fmeum Jan 27, 2025
1449cff
Make optional
fmeum Jan 28, 2025
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8 changes: 8 additions & 0 deletions src/main/cpp/blaze.cc
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Expand Up @@ -432,6 +432,14 @@ static vector<string> GetServerExeArgs(const blaze_util::Path &jvm_path,
// https://github.com/openjdk/jdk/blob/2faf8b8d582183275b1fdc92313a1c63c1753e80/src/java.base/share/classes/sun/nio/fs/AbstractWatchKey.java#L40
result.push_back("-Djdk.nio.file.WatchService.maxEventsPerPoll=10000");

#if defined(_WIN32)
// See and use more than 64 CPUs on Windows.
// https://bugs.openjdk.org/browse/JDK-6942632
result.push_back("-XX:+IgnoreUnrecognizedVMOptions");
result.push_back("-XX:+UseAllWindowsProcessorGroups");
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result.push_back("-XX:-IgnoreUnrecognizedVMOptions");
#endif

if (startup_options.host_jvm_debug) {
BAZEL_LOG(USER)
<< "Running host JVM under debugger (listening on TCP port 5005).";
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