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Bug 919638 - Part 2: Change warmup semantics to be sequential in slices, low to high. (r=nmatsakis)

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This commit is contained in:
Shu-yu Guo 2014-01-10 02:25:34 -08:00
parent 858f7992dd
commit d1e62d2d8a
1 changed files with 29 additions and 10 deletions
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39
js/src/vm/ForkJoin.cpp
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@ -46,7 +46,8 @@ using mozilla::ThreadLocal;
// altogether.
static bool
ExecuteSequentially(JSContext *cx_, HandleValue funVal, bool *complete, uint16_t numSlices);
ExecuteSequentially(JSContext *cx_, HandleValue funVal, bool *complete,
uint16_t sliceStart, uint16_t numSlices);
#if !defined(JS_THREADSAFE) || !defined(JS_ION)
bool
@ -150,10 +151,11 @@ js::ParallelTestsShouldPass(JSContext *cx)
// Some code that is shared between degenerate and parallel configurations.
static bool
ExecuteSequentially(JSContext *cx, HandleValue funVal, bool *complete, uint16_t numSlices)
ExecuteSequentially(JSContext *cx, HandleValue funVal, bool *complete,
uint16_t sliceStart, uint16_t numSlices)
{
bool allComplete = true;
for (uint16_t i = 0; i < numSlices; i++) {
for (uint16_t i = sliceStart; i < numSlices; i++) {
FastInvokeGuard fig(cx, funVal);
InvokeArgs &args = fig.args();
if (!args.init(2))
@ -283,6 +285,7 @@ class ForkJoinOperation
AutoScriptVector worklist_;
Vector<WorklistData, 16> worklistData_;
ForkJoinMode mode_;
uint16_t warmupSlice_;
uint16_t numSlices_;
TrafficLight enqueueInitialScript(ExecutionStatus *status);
@ -548,6 +551,7 @@ js::ForkJoinOperation::ForkJoinOperation(JSContext *cx, HandleObject fun, ForkJo
worklist_(cx),
worklistData_(cx),
mode_(mode),
warmupSlice_(0),
numSlices_(numSlices)
{ }
@ -973,7 +977,7 @@ js::ForkJoinOperation::sequentialExecution(bool disqualified)
bool complete = false;
RootedValue funVal(cx_, ObjectValue(*fun_));
if (!ExecuteSequentially(cx_, funVal, &complete, numSlices_))
if (!ExecuteSequentially(cx_, funVal, &complete, 0, numSlices_))
return ExecutionFatal;
// When invoked without the warmup flag set to true, the kernel
@ -1131,20 +1135,35 @@ js::ForkJoinOperation::warmupExecution(bool stopIfComplete, ExecutionStatus *sta
// GreenLight: warmup succeeded, still more work to do
// RedLight: fatal error or warmup completed all work (check status)
Spew(SpewOps, "Executing warmup.");
Spew(SpewOps, "Executing warmup of slice %u.", warmupSlice_);
AutoEnterWarmup warmup(cx_->runtime());
RootedValue funVal(cx_, ObjectValue(*fun_));
bool complete;
if (!ExecuteSequentially(cx_, funVal, &complete, numSlices_)) {
uint32_t warmupTo = Min<uint16_t>(warmupSlice_ + 1, numSlices_);
if (!ExecuteSequentially(cx_, funVal, &complete, warmupSlice_, warmupTo)) {
*status = ExecutionFatal;
return RedLight;
}
if (complete && stopIfComplete) {
Spew(SpewOps, "Warmup execution finished all the work.");
*status = ExecutionWarmup;
return RedLight;
if (complete) {
warmupSlice_ = warmupTo;
if (warmupSlice_ == numSlices_) {
if (stopIfComplete) {
Spew(SpewOps, "Warmup execution finished all the work.");
*status = ExecutionWarmup;
return RedLight;
}
// If we finished all slices in warmup, be sure check the
// interrupt flag. This is because we won't be running more JS
// code, and thus no more automatic checking of the interrupt
// flag.
if (!js_HandleExecutionInterrupt(cx_)) {
*status = ExecutionFatal;
return RedLight;
}
}
}
return GreenLight;