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pjs
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Landing (again) Bug 373462, bug 385322, Better scheduling of cycle collection/gc, r+sr=sicking,jst

This commit is contained in:
Olli.Pettay@helsinki.fi 2007-10-22 14:42:25 -07:00
Родитель 1ac5b8b2bd
Коммит 0a4c65920e
6 изменённых файлов: 287 добавлений и 19 удалений
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3
content/base/src/nsXMLHttpRequest.cpp
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@ -56,6 +56,7 @@
#include "prprf.h"
#include "nsIDOMEventListener.h"
#include "nsIJSContextStack.h"
#include "nsJSEnvironment.h"
#include "nsIScriptSecurityManager.h"
#include "nsWeakPtr.h"
#include "nsICharsetAlias.h"
@ -1778,6 +1779,7 @@ nsXMLHttpRequest::RequestCompleted()
ChangeState(XML_HTTP_REQUEST_OPENED);
}
nsJSContext::MaybeCC(PR_FALSE);
return rv;
}
@ -2320,6 +2322,7 @@ nsXMLHttpRequest::Error(nsIDOMEvent* aEvent)
NotifyEventListeners(errorEventListeners, event);
}
nsJSContext::MaybeCC(PR_FALSE);
return NS_OK;
}

79
content/events/src/nsEventStateManager.cpp
Просмотреть файл

@ -136,6 +136,9 @@
#include "nsEventDispatcher.h"
#include "nsPresShellIterator.h"
#include "nsServiceManagerUtils.h"
#include "nsITimer.h"
#ifdef XP_MACOSX
#include <Events.h>
#endif
@ -144,6 +147,8 @@
//#define DEBUG_DOCSHELL_FOCUS
#endif
#define NS_USER_INTERACTION_INTERVAL 5000 // ms
static NS_DEFINE_CID(kFrameTraversalCID, NS_FRAMETRAVERSAL_CID);
@ -171,6 +176,41 @@ static PRUint32 sESMInstanceCount = 0;
static PRInt32 sChromeAccessModifier = 0, sContentAccessModifier = 0;
PRInt32 nsEventStateManager::sUserInputEventDepth = 0;
static PRUint32 gMouseOrKeyboardEventCounter = 0;
static nsITimer* gUserInteractionTimer = nsnull;
static nsITimerCallback* gUserInteractionTimerCallback = nsnull;
class nsUITimerCallback : public nsITimerCallback
{
public:
nsUITimerCallback() : mPreviousCount(0) {}
NS_DECL_ISUPPORTS
NS_DECL_NSITIMERCALLBACK
private:
PRUint32 mPreviousCount;
};
NS_IMPL_ISUPPORTS1(nsUITimerCallback, nsITimerCallback)
// If aTimer is nsnull, this method always sends "user-interaction-inactive"
// notification.
NS_IMETHODIMP
nsUITimerCallback::Notify(nsITimer* aTimer)
{
nsresult rv;
nsCOMPtr<nsIObserverService> obs =
do_GetService("@mozilla.org/observer-service;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
if ((gMouseOrKeyboardEventCounter == mPreviousCount) || !aTimer) {
gMouseOrKeyboardEventCounter = 0;
obs->NotifyObservers(nsnull, "user-interaction-inactive", nsnull);
} else {
obs->NotifyObservers(nsnull, "user-interaction-active", nsnull);
}
mPreviousCount = gMouseOrKeyboardEventCounter;
return NS_OK;
}
enum {
MOUSE_SCROLL_N_LINES,
MOUSE_SCROLL_PAGE,
@ -431,6 +471,18 @@ nsEventStateManager::nsEventStateManager()
mTabbedThroughDocument(PR_FALSE),
mAccessKeys(nsnull)
{
if (sESMInstanceCount == 0) {
gUserInteractionTimerCallback = new nsUITimerCallback();
if (gUserInteractionTimerCallback) {
NS_ADDREF(gUserInteractionTimerCallback);
CallCreateInstance("@mozilla.org/timer;1", &gUserInteractionTimer);
if (gUserInteractionTimer) {
gUserInteractionTimer->InitWithCallback(gUserInteractionTimerCallback,
NS_USER_INTERACTION_INTERVAL,
nsITimer::TYPE_REPEATING_SLACK);
}
}
}
++sESMInstanceCount;
}
@ -509,6 +561,14 @@ nsEventStateManager::~nsEventStateManager()
if(sESMInstanceCount == 0) {
NS_IF_RELEASE(gLastFocusedContent);
NS_IF_RELEASE(gLastFocusedDocument);
if (gUserInteractionTimerCallback) {
gUserInteractionTimerCallback->Notify(nsnull);
NS_RELEASE(gUserInteractionTimerCallback);
}
if (gUserInteractionTimer) {
gUserInteractionTimer->Cancel();
NS_RELEASE(gUserInteractionTimer);
}
}
delete mAccessKeys;
@ -724,6 +784,25 @@ nsEventStateManager::PreHandleEvent(nsPresContext* aPresContext,
if (!mCurrentTarget) return NS_ERROR_NULL_POINTER;
}
// Do not take account NS_MOUSE_ENTER/EXIT so that loading a page
// when user is not active doesn't change the state to active.
if (NS_IS_TRUSTED_EVENT(aEvent) &&
((aEvent->eventStructType == NS_MOUSE_EVENT &&
static_cast<nsMouseEvent*>(aEvent)->reason == nsMouseEvent::eReal &&
aEvent->message != NS_MOUSE_ENTER &&
aEvent->message != NS_MOUSE_EXIT) ||
aEvent->eventStructType == NS_MOUSE_SCROLL_EVENT ||
aEvent->eventStructType == NS_KEY_EVENT)) {
if (gMouseOrKeyboardEventCounter == 0) {
nsCOMPtr<nsIObserverService> obs =
do_GetService("@mozilla.org/observer-service;1");
if (obs) {
obs->NotifyObservers(nsnull, "user-interaction-active", nsnull);
}
}
++gMouseOrKeyboardEventCounter;
}
*aStatus = nsEventStatus_eIgnore;
nsMouseWheelTransaction::OnEvent(aEvent);

182
dom/src/base/nsJSEnvironment.cpp
Просмотреть файл

@ -149,8 +149,27 @@ static PRLogModuleInfo* gJSDiagnostics;
#define JAVASCRIPT nsIProgrammingLanguage::JAVASCRIPT
// The max number of delayed cycle collects..
#define NS_MAX_DELAYED_CCOLLECT 45
// The max number of user interaction notifications in inactive state before
// we try to call cycle collector more aggressively.
#define NS_CC_SOFT_LIMIT_INACTIVE 6
// The max number of user interaction notifications in active state before
// we try to call cycle collector more aggressively.
#define NS_CC_SOFT_LIMIT_ACTIVE 12
// When higher probability MaybeCC is used, the number of sDelayedCCollectCount
// is multiplied with this number.
#define NS_PROBABILITY_MULTIPLIER 3
// Cycle collector should never run more often than this value
#define NS_MIN_CC_INTERVAL 10000 // ms
// if you add statics here, add them to the list in nsJSRuntime::Startup
static PRUint32 sDelayedCCollectCount;
static PRUint32 sCCollectCount;
static PRBool sUserIsActive;
static PRTime sPreviousCCTime;
static PRBool sPreviousCCDidCollect;
static nsITimer *sGCTimer;
static PRBool sReadyForGC;
@ -194,6 +213,74 @@ static nsICollation *gCollation;
static nsIUnicodeDecoder *gDecoder;
// nsUserActivityObserver observes user-interaction-active and
// user-interaction-inactive notifications. It counts the number of
// notifications and if the number is bigger than NS_CC_SOFT_LIMIT_ACTIVE
// (in case the current notification is user-interaction-active) or
// NS_CC_SOFT_LIMIT_INACTIVE (current notification is user-interaction-inactive)
// MaybeCC is called with aHigherParameter set to PR_TRUE, otherwise PR_FALSE.
//
// When moving from active state to inactive, nsJSContext::CC() is called
// unless the timer related to page load is active.
class nsUserActivityObserver : public nsIObserver
{
public:
nsUserActivityObserver()
: mUserActivityCounter(0), mOldCCollectCount(0) {}
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
private:
PRUint32 mUserActivityCounter;
PRUint32 mOldCCollectCount;
};
NS_IMPL_ISUPPORTS1(nsUserActivityObserver, nsIObserver)
NS_IMETHODIMP
nsUserActivityObserver::Observe(nsISupports* aSubject, const char* aTopic,
const PRUnichar* aData)
{
if (mOldCCollectCount != sCCollectCount) {
mOldCCollectCount = sCCollectCount;
// Cycle collector was called between user interaction notifications, so
// we can reset the counter.
mUserActivityCounter = 0;
}
PRBool higherProbability = PR_FALSE;
++mUserActivityCounter;
if (!strcmp(aTopic, "user-interaction-inactive")) {
#ifdef DEBUG_smaug
printf("user-interaction-inactive\n");
#endif
if (sUserIsActive) {
sUserIsActive = PR_FALSE;
if (!sGCTimer) {
nsJSContext::CC();
return NS_OK;
}
}
higherProbability = (mUserActivityCounter > NS_CC_SOFT_LIMIT_INACTIVE);
} else if (!strcmp(aTopic, "user-interaction-active")) {
#ifdef DEBUG_smaug
printf("user-interaction-active\n");
#endif
sUserIsActive = PR_TRUE;
higherProbability = (mUserActivityCounter > NS_CC_SOFT_LIMIT_ACTIVE);
} else if (!strcmp(aTopic, "xpcom-shutdown")) {
nsCOMPtr<nsIObserverService> obs =
do_GetService("@mozilla.org/observer-service;1");
if (obs) {
obs->RemoveObserver(this, "user-interaction-active");
obs->RemoveObserver(this, "user-interaction-inactive");
obs->RemoveObserver(this, "xpcom-shutdown");
}
return NS_OK;
}
nsJSContext::MaybeCC(higherProbability);
return NS_OK;
}
/****************************************************************
************************** AutoFree ****************************
****************************************************************/
@ -3171,6 +3258,73 @@ nsJSContext::PreserveWrapper(nsIXPConnectWrappedNative *aWrapper)
return nsDOMClassInfo::PreserveNodeWrapper(aWrapper);
}
//static
void
nsJSContext::CC()
{
sPreviousCCTime = PR_Now();
sDelayedCCollectCount = 0;
++sCCollectCount;
#ifdef DEBUG_smaug
printf("Will run cycle collector (%i)\n", sCCollectCount);
#endif
// nsCycleCollector_collect() will run a ::JS_GC() indirectly, so
// we do not explicitly call ::JS_GC() here.
PRBool firstRun = nsCycleCollector_collect();
#ifdef DEBUG_smaug
printf("(1) %s\n", firstRun ?
"Cycle collector did collect nodes" :
"Cycle collector did not collect nodes");
#endif
PRBool secondRun = PR_FALSE;
if (!sUserIsActive) {
secondRun = nsCycleCollector_collect();
#ifdef DEBUG_smaug
printf("(2) %s\n", secondRun ?
"Cycle collector did collect nodes" :
"Cycle collector did not collect nodes");
#endif
}
sPreviousCCDidCollect = firstRun || secondRun;
}
//static
PRBool
nsJSContext::MaybeCC(PRBool aHigherProbability)
{
++sDelayedCCollectCount;
// Increase the probability also if the previous call to cycle collector
// collected something.
if (aHigherProbability || sPreviousCCDidCollect) {
sDelayedCCollectCount *= NS_PROBABILITY_MULTIPLIER;
}
if (!sGCTimer && (sDelayedCCollectCount > NS_MAX_DELAYED_CCOLLECT)) {
if ((PR_Now() - sPreviousCCTime) >=
PRTime(NS_MIN_CC_INTERVAL * PR_USEC_PER_MSEC)) {
nsJSContext::CC();
return PR_TRUE;
}
#ifdef DEBUG_smaug
else {
printf("Running cycle collector was delayed: NS_MIN_CC_INTERVAL\n");
}
#endif
}
return PR_FALSE;
}
//static
void
nsJSContext::CCIfUserInactive()
{
if (sUserIsActive) {
MaybeCC(PR_TRUE);
} else {
CC();
}
}
NS_IMETHODIMP
nsJSContext::Notify(nsITimer *timer)
{
@ -3189,9 +3343,7 @@ nsJSContext::Notify(nsITimer *timer)
// loading and move on as if they weren't.
sPendingLoadCount = 0;
// nsCycleCollector_collect() will run a ::JS_GC() indirectly,
// so we do not explicitly call ::JS_GC() here.
nsCycleCollector_collect();
CCIfUserInactive();
} else {
FireGCTimer(PR_TRUE);
}
@ -3220,13 +3372,10 @@ nsJSContext::LoadEnd()
if (!sPendingLoadCount && sLoadInProgressGCTimer) {
sGCTimer->Cancel();
NS_RELEASE(sGCTimer);
sLoadInProgressGCTimer = PR_FALSE;
// nsCycleCollector_collect() will run a ::JS_GC() indirectly, so
// we do not explicitly call ::JS_GC() here.
nsCycleCollector_collect();
CCIfUserInactive();
}
}
@ -3253,10 +3402,7 @@ nsJSContext::FireGCTimer(PRBool aLoadInProgress)
// timer.
sLoadInProgressGCTimer = PR_FALSE;
// nsCycleCollector_collect() will run a ::JS_GC() indirectly, so
// we do not explicitly call ::JS_GC() here.
nsCycleCollector_collect();
CCIfUserInactive();
return;
}
@ -3364,6 +3510,11 @@ void
nsJSRuntime::Startup()
{
// initialize all our statics, so that we can restart XPCOM
sDelayedCCollectCount = 0;
sCCollectCount = 0;
sUserIsActive = PR_FALSE;
sPreviousCCTime = 0;
sPreviousCCDidCollect = PR_FALSE;
sGCTimer = nsnull;
sReadyForGC = PR_FALSE;
sLoadInProgressGCTimer = PR_FALSE;
@ -3482,6 +3633,15 @@ nsJSRuntime::Init()
MaxScriptRunTimePrefChangedCallback("dom.max_chrome_script_run_time",
nsnull);
nsCOMPtr<nsIObserverService> obs =
do_GetService("@mozilla.org/observer-service;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsIObserver* activityObserver = new nsUserActivityObserver();
NS_ENSURE_TRUE(activityObserver, NS_ERROR_OUT_OF_MEMORY);
obs->AddObserver(activityObserver, "user-interaction-inactive", PR_FALSE);
obs->AddObserver(activityObserver, "user-interaction-active", PR_FALSE);
obs->AddObserver(activityObserver, "xpcom-shutdown", PR_FALSE);
rv = CallGetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &sSecurityManager);
sIsInitialized = NS_SUCCEEDED(rv);

21
dom/src/base/nsJSEnvironment.h
Просмотреть файл

@ -170,6 +170,27 @@ public:
static void LoadStart();
static void LoadEnd();
// CC does always call cycle collector and it also updates the counters
// that MaybeCC uses.
static void CC();
// MaybeCC calls cycle collector if certain conditions are fulfilled.
// The conditions are:
// - The timer related to page load (sGCTimer) must not be active.
// - At least NS_MIN_CC_INTERVAL milliseconds must have elapsed since the
// previous cycle collector call.
// - Certain number of MaybeCC calls have occurred.
// The number of needed MaybeCC calls depends on the aHigherProbability
// parameter. If the parameter is true, probability for calling cycle
// collector rises increasingly. If the parameter is all the time false,
// at least NS_MAX_DELAYED_CCOLLECT MaybeCC calls are needed.
// If the previous call to cycle collector did collect something,
// MaybeCC works effectively as if aHigherProbability was true.
// @return PR_TRUE if cycle collector was called.
static PRBool MaybeCC(PRBool aHigherProbability);
// Calls CC() if user is currently inactive, otherwise MaybeCC(PR_TRUE)
static void CCIfUserInactive();
protected:
nsresult InitializeExternalClasses();
// aHolder should be holding our global object

18
xpcom/base/nsCycleCollector.cpp
Просмотреть файл

@ -869,7 +869,7 @@ struct nsCycleCollector
PRBool Forget(nsISupports *n);
void Allocated(void *n, size_t sz);
void Freed(void *n);
void Collect(PRUint32 aTryCollections = 1);
PRBool Collect(PRUint32 aTryCollections = 1);
void Shutdown();
#ifdef DEBUG_CC
@ -2021,9 +2021,10 @@ nsCycleCollector::Freed(void *n)
}
#endif
void
PRBool
nsCycleCollector::Collect(PRUint32 aTryCollections)
{
PRBool didCollect = PR_FALSE;
#if defined(DEBUG_CC) && !defined(__MINGW32__)
if (!mParams.mDoNothing && mParams.mHookMalloc)
InitMemHook();
@ -2031,7 +2032,7 @@ nsCycleCollector::Collect(PRUint32 aTryCollections)
// This can legitimately happen in a few cases. See bug 383651.
if (mCollectionInProgress)
return;
return didCollect;
#ifdef COLLECT_TIME_DEBUG
printf("cc: Starting nsCycleCollector::Collect(%d)\n", aTryCollections);
@ -2168,8 +2169,11 @@ nsCycleCollector::Collect(PRUint32 aTryCollections)
// mBuf.GetSize() == 0 check above), we should stop
// repeating collections if we didn't collect anything
// this time.
if (!collected)
if (!collected) {
aTryCollections = 0;
} else {
didCollect = PR_TRUE;
}
}
#ifdef DEBUG_CC
@ -2194,6 +2198,7 @@ nsCycleCollector::Collect(PRUint32 aTryCollections)
#ifdef DEBUG_CC
ExplainLiveExpectedGarbage();
#endif
return didCollect;
}
void
@ -2594,11 +2599,10 @@ NS_CycleCollectorForget(nsISupports *n)
}
void
PRBool
nsCycleCollector_collect()
{
if (sCollector)
sCollector->Collect();
return sCollector ? sCollector->Collect() : PR_FALSE;
}
nsresult

3
xpcom/base/nsCycleCollector.h
Просмотреть файл

@ -66,7 +66,8 @@ struct nsCycleCollectionLanguageRuntime
NS_COM void nsCycleCollector_suspectCurrent(nsISupports *n);
// NS_COM PRBool nsCycleCollector_forget(nsISupports *n);
nsresult nsCycleCollector_startup();
NS_COM void nsCycleCollector_collect();
// Returns PR_TRUE if some nodes were collected.
NS_COM PRBool nsCycleCollector_collect();
void nsCycleCollector_shutdown();
#ifdef DEBUG