diff options
author | Mårten Nordheim <marten.nordheim@qt.io> | 2023-02-23 15:15:46 +0100 |
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committer | Mårten Nordheim <marten.nordheim@qt.io> | 2023-02-28 16:49:42 +0100 |
commit | ee1651efdd32dfb96443828ddaeddccb3e4e3648 (patch) | |
tree | 018747bb83b408a3c3630c05d8c129ed64a5815c /src | |
parent | 97dcf1ba1865934b7d047d573443e804699a05e9 (diff) |
QtConcurrent: yield CPU when spinning on atomics
Pick-to: 6.5
Change-Id: I3eef19d8737da60bee40385a64a1bc136d2e7329
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src')
-rw-r--r-- | src/concurrent/qtconcurrentthreadengine.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/concurrent/qtconcurrentthreadengine.cpp b/src/concurrent/qtconcurrentthreadengine.cpp index d10cca5de7..03e018b0a2 100644 --- a/src/concurrent/qtconcurrentthreadengine.cpp +++ b/src/concurrent/qtconcurrentthreadengine.cpp @@ -3,6 +3,8 @@ #include "qtconcurrentthreadengine.h" +#include <QtCore/private/qsimd_p.h> + #if !defined(QT_NO_CONCURRENT) || defined(Q_QDOC) QT_BEGIN_NAMESPACE @@ -63,6 +65,7 @@ void ThreadEngineBarrier::acquire() if (count.testAndSetOrdered(localCount, localCount + 1)) return; } + qYieldCpu(); } } @@ -82,6 +85,7 @@ int ThreadEngineBarrier::release() if (count.testAndSetOrdered(localCount, localCount - 1)) return localCount - 1; } + qYieldCpu(); } } @@ -98,6 +102,7 @@ void ThreadEngineBarrier::wait() semaphore.acquire(); return; } + qYieldCpu(); } } @@ -121,6 +126,7 @@ bool ThreadEngineBarrier::releaseUnlessLast() if (count.testAndSetOrdered(localCount, localCount - 1)) return true; } + qYieldCpu(); } } |