зеркало из https://github.com/mozilla/pjs.git
Pulled out NS_MeanAndStdDev as an xpcom exported function for convenience.
This commit is contained in:
warren%netscape.com
Родитель
cd95a8bb37
Коммит
d8882419e0
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@ -103,6 +103,29 @@ static FILE *gLeakyLog = nsnull;
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#define XPCOM_REFCNT_LOG_CALLS 0x10
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#define XPCOM_REFCNT_LOG_NEW 0x20
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////////////////////////////////////////////////////////////////////////////////
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NS_COM void
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NS_MeanAndStdDev(double n, double sumOfValues, double sumOfSquaredValues,
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double *meanResult, double *stdDevResult)
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{
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double mean = 0.0, var = 0.0, stdDev = 0.0;
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if (n > 0.0 && sumOfValues >= 0) {
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mean = sumOfValues / n;
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double temp = (n * sumOfSquaredValues) - (sumOfValues * sumOfValues);
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if (temp < 0.0 || n <= 1)
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var = 0.0;
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else
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var = temp / (n * (n - 1));
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// for some reason, Windows says sqrt(0.0) is "-1.#J" (?!) so do this:
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stdDev = var != 0.0 ? sqrt(var) : 0.0;
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}
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*meanResult = mean;
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*stdDevResult = stdDev;
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}
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////////////////////////////////////////////////////////////////////////////////
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struct GatherArgs {
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nsTraceRefcntStatFunc func;
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void* closure;
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@ -126,9 +149,9 @@ public:
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stats->mCreates = 0;
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stats->mDestroys = 0;
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stats->mRefsOutstandingTotal = 0;
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stats->mRefsOutstandingVariance = 0;
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stats->mRefsOutstandingSquared = 0;
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stats->mObjsOutstandingTotal = 0;
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stats->mObjsOutstandingVariance = 0;
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stats->mObjsOutstandingSquared = 0;
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}
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void Accumulate() {
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@ -137,9 +160,9 @@ public:
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mAllStats.mCreates += mNewStats.mCreates;
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mAllStats.mDestroys += mNewStats.mDestroys;
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mAllStats.mRefsOutstandingTotal += mNewStats.mRefsOutstandingTotal;
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mAllStats.mRefsOutstandingVariance += mNewStats.mRefsOutstandingVariance;
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mAllStats.mRefsOutstandingSquared += mNewStats.mRefsOutstandingSquared;
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mAllStats.mObjsOutstandingTotal += mNewStats.mObjsOutstandingTotal;
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mAllStats.mObjsOutstandingVariance += mNewStats.mObjsOutstandingVariance;
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mAllStats.mObjsOutstandingSquared += mNewStats.mObjsOutstandingSquared;
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Clear(&mNewStats);
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}
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@ -172,13 +195,13 @@ public:
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void AccountRefs() {
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PRInt32 cnt = (mNewStats.mAddRefs - mNewStats.mReleases);
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mNewStats.mRefsOutstandingTotal += cnt;
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mNewStats.mRefsOutstandingVariance += cnt * cnt;
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mNewStats.mRefsOutstandingSquared += cnt * cnt;
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}
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void AccountObjs() {
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PRInt32 cnt = (mNewStats.mCreates - mNewStats.mDestroys);
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mNewStats.mObjsOutstandingTotal += cnt;
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mNewStats.mObjsOutstandingVariance += cnt * cnt;
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mNewStats.mObjsOutstandingSquared += cnt * cnt;
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}
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static PRIntn DumpNewEntry(PLHashEntry *he, PRIntn i, void *arg) {
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@ -215,9 +238,9 @@ public:
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total->mAllStats.mCreates += mNewStats.mCreates + mAllStats.mCreates;
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total->mAllStats.mDestroys += mNewStats.mDestroys + mAllStats.mDestroys;
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total->mAllStats.mRefsOutstandingTotal += mNewStats.mRefsOutstandingTotal + mAllStats.mRefsOutstandingTotal;
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total->mAllStats.mRefsOutstandingVariance += mNewStats.mRefsOutstandingVariance + mAllStats.mRefsOutstandingVariance;
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total->mAllStats.mRefsOutstandingSquared += mNewStats.mRefsOutstandingSquared + mAllStats.mRefsOutstandingSquared;
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total->mAllStats.mObjsOutstandingTotal += mNewStats.mObjsOutstandingTotal + mAllStats.mObjsOutstandingTotal;
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total->mAllStats.mObjsOutstandingVariance += mNewStats.mObjsOutstandingVariance + mAllStats.mObjsOutstandingVariance;
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total->mAllStats.mObjsOutstandingSquared += mNewStats.mObjsOutstandingSquared + mAllStats.mObjsOutstandingSquared;
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PRInt32 count = (mNewStats.mCreates + mAllStats.mCreates);
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total->mClassSize += mClassSize * count; // adjust for average in DumpTotal
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}
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@ -268,23 +291,18 @@ public:
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return NS_OK;
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}
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double nRefs = stats->mAddRefs + stats->mReleases;
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double meanRefs = 0.0, varRefs = 0.0, stddevRefs = 0.0;
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if (nRefs > 0.0 && stats->mRefsOutstandingTotal >= 0) {
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meanRefs = stats->mRefsOutstandingTotal / nRefs;
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varRefs = fabs(stats->mRefsOutstandingVariance / nRefs - meanRefs * meanRefs);
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// for some reason, Windows says sqrt(0.0) is "-1.#J" (?!) so do this:
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stddevRefs = varRefs != 0.0 ? sqrt(varRefs) : 0.0;
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}
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double meanRefs, stddevRefs;
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NS_MeanAndStdDev(stats->mAddRefs + stats->mReleases,
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stats->mRefsOutstandingTotal,
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stats->mRefsOutstandingSquared,
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&meanRefs, &stddevRefs);
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double meanObjs, stddevObjs;
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NS_MeanAndStdDev(stats->mCreates + stats->mDestroys,
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stats->mObjsOutstandingTotal,
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stats->mObjsOutstandingSquared,
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&meanObjs, &stddevObjs);
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double nObjs = stats->mCreates + stats->mDestroys;
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double meanObjs = 0.0, varObjs = 0.0, stddevObjs = 0.0;
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if (nObjs > 0.0 && stats->mObjsOutstandingTotal >= 0) {
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meanObjs = stats->mObjsOutstandingTotal / nObjs;
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varObjs = fabs(stats->mObjsOutstandingVariance / nObjs - meanObjs * meanObjs);
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// for some reason, Windows says sqrt(0.0) is "-1.#J" (?!) so do this:
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stddevObjs = varObjs != 0.0 ? sqrt(varObjs) : 0.0;
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}
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if ((stats->mAddRefs - stats->mReleases) != 0 ||
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stats->mAddRefs != 0 ||
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meanRefs != 0 ||
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@ -116,9 +116,9 @@ struct nsTraceRefcntStats {
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nsrefcnt mCreates;
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nsrefcnt mDestroys;
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double mRefsOutstandingTotal;
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double mRefsOutstandingVariance;
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double mRefsOutstandingSquared;
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double mObjsOutstandingTotal;
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double mObjsOutstandingVariance;
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double mObjsOutstandingSquared;
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};
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// Function type used by GatherStatistics. For each type that data has
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@ -202,4 +202,12 @@ public:
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static NS_COM void SetPrefServiceAvailability(PRBool avail);
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};
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////////////////////////////////////////////////////////////////////////////////
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// And now for that utility that you've all been asking for...
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extern NS_COM void
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NS_MeanAndStdDev(double n, double sumOfValues, double sumOfSquaredValues,
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double *meanResult, double *stdDevResult);
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////////////////////////////////////////////////////////////////////////////////
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#endif /* nsTraceRefcnt_h___ */
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@ -103,6 +103,29 @@ static FILE *gLeakyLog = nsnull;
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#define XPCOM_REFCNT_LOG_CALLS 0x10
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#define XPCOM_REFCNT_LOG_NEW 0x20
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////////////////////////////////////////////////////////////////////////////////
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NS_COM void
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NS_MeanAndStdDev(double n, double sumOfValues, double sumOfSquaredValues,
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double *meanResult, double *stdDevResult)
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{
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double mean = 0.0, var = 0.0, stdDev = 0.0;
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if (n > 0.0 && sumOfValues >= 0) {
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mean = sumOfValues / n;
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double temp = (n * sumOfSquaredValues) - (sumOfValues * sumOfValues);
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if (temp < 0.0 || n <= 1)
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var = 0.0;
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else
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var = temp / (n * (n - 1));
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// for some reason, Windows says sqrt(0.0) is "-1.#J" (?!) so do this:
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stdDev = var != 0.0 ? sqrt(var) : 0.0;
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}
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*meanResult = mean;
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*stdDevResult = stdDev;
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}
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////////////////////////////////////////////////////////////////////////////////
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struct GatherArgs {
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nsTraceRefcntStatFunc func;
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void* closure;
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@ -126,9 +149,9 @@ public:
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stats->mCreates = 0;
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stats->mDestroys = 0;
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stats->mRefsOutstandingTotal = 0;
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stats->mRefsOutstandingVariance = 0;
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stats->mRefsOutstandingSquared = 0;
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stats->mObjsOutstandingTotal = 0;
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stats->mObjsOutstandingVariance = 0;
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stats->mObjsOutstandingSquared = 0;
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}
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void Accumulate() {
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@ -137,9 +160,9 @@ public:
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mAllStats.mCreates += mNewStats.mCreates;
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mAllStats.mDestroys += mNewStats.mDestroys;
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mAllStats.mRefsOutstandingTotal += mNewStats.mRefsOutstandingTotal;
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mAllStats.mRefsOutstandingVariance += mNewStats.mRefsOutstandingVariance;
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mAllStats.mRefsOutstandingSquared += mNewStats.mRefsOutstandingSquared;
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mAllStats.mObjsOutstandingTotal += mNewStats.mObjsOutstandingTotal;
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mAllStats.mObjsOutstandingVariance += mNewStats.mObjsOutstandingVariance;
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mAllStats.mObjsOutstandingSquared += mNewStats.mObjsOutstandingSquared;
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Clear(&mNewStats);
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}
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@ -172,13 +195,13 @@ public:
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void AccountRefs() {
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PRInt32 cnt = (mNewStats.mAddRefs - mNewStats.mReleases);
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mNewStats.mRefsOutstandingTotal += cnt;
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mNewStats.mRefsOutstandingVariance += cnt * cnt;
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mNewStats.mRefsOutstandingSquared += cnt * cnt;
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}
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void AccountObjs() {
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PRInt32 cnt = (mNewStats.mCreates - mNewStats.mDestroys);
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mNewStats.mObjsOutstandingTotal += cnt;
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mNewStats.mObjsOutstandingVariance += cnt * cnt;
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mNewStats.mObjsOutstandingSquared += cnt * cnt;
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}
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static PRIntn DumpNewEntry(PLHashEntry *he, PRIntn i, void *arg) {
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@ -215,9 +238,9 @@ public:
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total->mAllStats.mCreates += mNewStats.mCreates + mAllStats.mCreates;
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total->mAllStats.mDestroys += mNewStats.mDestroys + mAllStats.mDestroys;
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total->mAllStats.mRefsOutstandingTotal += mNewStats.mRefsOutstandingTotal + mAllStats.mRefsOutstandingTotal;
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total->mAllStats.mRefsOutstandingVariance += mNewStats.mRefsOutstandingVariance + mAllStats.mRefsOutstandingVariance;
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total->mAllStats.mRefsOutstandingSquared += mNewStats.mRefsOutstandingSquared + mAllStats.mRefsOutstandingSquared;
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total->mAllStats.mObjsOutstandingTotal += mNewStats.mObjsOutstandingTotal + mAllStats.mObjsOutstandingTotal;
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total->mAllStats.mObjsOutstandingVariance += mNewStats.mObjsOutstandingVariance + mAllStats.mObjsOutstandingVariance;
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total->mAllStats.mObjsOutstandingSquared += mNewStats.mObjsOutstandingSquared + mAllStats.mObjsOutstandingSquared;
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PRInt32 count = (mNewStats.mCreates + mAllStats.mCreates);
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total->mClassSize += mClassSize * count; // adjust for average in DumpTotal
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}
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@ -268,23 +291,18 @@ public:
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return NS_OK;
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}
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double nRefs = stats->mAddRefs + stats->mReleases;
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double meanRefs = 0.0, varRefs = 0.0, stddevRefs = 0.0;
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if (nRefs > 0.0 && stats->mRefsOutstandingTotal >= 0) {
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meanRefs = stats->mRefsOutstandingTotal / nRefs;
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varRefs = fabs(stats->mRefsOutstandingVariance / nRefs - meanRefs * meanRefs);
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// for some reason, Windows says sqrt(0.0) is "-1.#J" (?!) so do this:
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stddevRefs = varRefs != 0.0 ? sqrt(varRefs) : 0.0;
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}
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double meanRefs, stddevRefs;
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NS_MeanAndStdDev(stats->mAddRefs + stats->mReleases,
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stats->mRefsOutstandingTotal,
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stats->mRefsOutstandingSquared,
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&meanRefs, &stddevRefs);
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double meanObjs, stddevObjs;
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NS_MeanAndStdDev(stats->mCreates + stats->mDestroys,
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stats->mObjsOutstandingTotal,
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stats->mObjsOutstandingSquared,
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&meanObjs, &stddevObjs);
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double nObjs = stats->mCreates + stats->mDestroys;
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double meanObjs = 0.0, varObjs = 0.0, stddevObjs = 0.0;
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if (nObjs > 0.0 && stats->mObjsOutstandingTotal >= 0) {
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meanObjs = stats->mObjsOutstandingTotal / nObjs;
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varObjs = fabs(stats->mObjsOutstandingVariance / nObjs - meanObjs * meanObjs);
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// for some reason, Windows says sqrt(0.0) is "-1.#J" (?!) so do this:
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stddevObjs = varObjs != 0.0 ? sqrt(varObjs) : 0.0;
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}
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if ((stats->mAddRefs - stats->mReleases) != 0 ||
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stats->mAddRefs != 0 ||
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meanRefs != 0 ||
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@ -116,9 +116,9 @@ struct nsTraceRefcntStats {
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nsrefcnt mCreates;
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nsrefcnt mDestroys;
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double mRefsOutstandingTotal;
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double mRefsOutstandingVariance;
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double mRefsOutstandingSquared;
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double mObjsOutstandingTotal;
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double mObjsOutstandingVariance;
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double mObjsOutstandingSquared;
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};
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// Function type used by GatherStatistics. For each type that data has
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@ -202,4 +202,12 @@ public:
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static NS_COM void SetPrefServiceAvailability(PRBool avail);
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};
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////////////////////////////////////////////////////////////////////////////////
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// And now for that utility that you've all been asking for...
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extern NS_COM void
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NS_MeanAndStdDev(double n, double sumOfValues, double sumOfSquaredValues,
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double *meanResult, double *stdDevResult);
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////////////////////////////////////////////////////////////////////////////////
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#endif /* nsTraceRefcnt_h___ */
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