From 26bc87fdad9f29c00a5e37d6d9aed7f6dc7ff416 Mon Sep 17 00:00:00 2001 From: Anuj Mittal Date: Mon, 12 Apr 2021 14:15:53 +0800 Subject: [PATCH] Disable use of _tpause instruction It is assuming right now that WAITPKG instructions are available when using gcc 11 or clang 12. It's possible that we are building for a CPU where it's not available - in this case anything older than Alder Lake. Disable for now until the detection isn't fixed upstream. Upstream-Status: Inappropriate Signed-off-by: Anuj Mittal --- src/tbb/scheduler_common.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/tbb/scheduler_common.h b/src/tbb/scheduler_common.h index ee13dbf9..49052001 100644 --- a/src/tbb/scheduler_common.h +++ b/src/tbb/scheduler_common.h @@ -219,7 +219,7 @@ inline void prolonged_pause_impl() { #endif inline void prolonged_pause() { -#if __TBB_WAITPKG_INTRINSICS_PRESENT && (_WIN32 || _WIN64 || __linux__) && (__TBB_x86_32 || __TBB_x86_64) +#if 0 if (governor::wait_package_enabled()) { std::uint64_t time_stamp = machine_time_stamp(); // _tpause function directs the processor to enter an implementation-dependent optimized state -- 2.29.0