Changeset 122182 in webkit for trunk/Source/JavaScriptCore/bytecode/ExecutionCounter.cpp

Timestamp:

Jul 9, 2012, 6:50:44 PM (13 years ago)

Author:

[email protected]

Message:

Unreviewed, roll out ​http://trac.webkit.org/changeset/121511
It made in-browser V8v7 10% slower.

• bytecode/CodeBlock.cpp:

(JSC::CodeBlock::CodeBlock):

• bytecode/CodeBlock.h:

(CodeBlock):
(JSC::CodeBlock::countSpeculationSuccess):
(JSC::CodeBlock::countSpeculationFailure):
(JSC::CodeBlock::speculativeSuccessCounter):
(JSC::CodeBlock::speculativeFailCounter):
(JSC::CodeBlock::forcedOSRExitCounter):
(JSC::CodeBlock::addressOfSpeculativeSuccessCounter):
(JSC::CodeBlock::addressOfSpeculativeFailCounter):
(JSC::CodeBlock::addressOfForcedOSRExitCounter):
(JSC::CodeBlock::offsetOfSpeculativeSuccessCounter):
(JSC::CodeBlock::offsetOfSpeculativeFailCounter):
(JSC::CodeBlock::offsetOfForcedOSRExitCounter):
(JSC::CodeBlock::largeFailCountThreshold):
(JSC::CodeBlock::largeFailCountThresholdForLoop):
(JSC::CodeBlock::shouldReoptimizeNow):
(JSC::CodeBlock::shouldReoptimizeFromLoopNow):

• bytecode/ExecutionCounter.cpp:

(JSC::ExecutionCounter::setThreshold):

• bytecode/ExecutionCounter.h:

(ExecutionCounter):

• dfg/DFGJITCompiler.cpp:

(JSC::DFG::JITCompiler::compileBody):

• dfg/DFGOSRExit.cpp:

(JSC::DFG::OSRExit::considerAddingAsFrequentExitSiteSlow):

• dfg/DFGOSRExitCompiler.cpp:

(JSC::DFG::OSRExitCompiler::handleExitCounts):

• dfg/DFGOperations.cpp:
• jit/JITStubs.cpp:

(JSC::DEFINE_STUB_FUNCTION):

• runtime/Options.h:

(JSC):

File:

• trunk/Source/JavaScriptCore/bytecode/ExecutionCounter.cpp (modified) (1 diff)

trunk/Source/JavaScriptCore/bytecode/ExecutionCounter.cpp

@@ -145 +145 @@
     }
 
-    threshold = clippedThreshold(codeBlock->globalObject(), threshold);
+    int32_t maxThreshold;
+    if (Options::randomizeExecutionCountsBetweenCheckpoints())
+        maxThreshold = codeBlock->globalObject()->weakRandomInteger() % Options::maximumExecutionCountsBetweenCheckpoints();
+    else
+        maxThreshold = Options::maximumExecutionCountsBetweenCheckpoints();
+    if (threshold > maxThreshold)
+        threshold = maxThreshold;
     
     m_counter = static_cast<int32_t>(-threshold);