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Reduce CPU usage from background PC polling

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This commit is contained in:
Cameron Gutman
2025-10-19 20:50:29 -05:00
parent 4bbd02fb2d
commit 3f8f4744c5
3 changed files with 34 additions and 25 deletions
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20
app/backend/computermanager.cpp
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@@ -29,9 +29,9 @@ public:
}
private:
bool tryPollComputer(NvAddress address, bool& changed)
bool tryPollComputer(QNetworkAccessManager* nam, NvAddress address, bool& changed)
{
NvHTTP http(address, 0, m_Computer->serverCert);
NvHTTP http(address, 0, m_Computer->serverCert, nam);
QString serverInfo;
try {
@@ -52,9 +52,9 @@ private:
return true;
}
bool updateAppList(bool& changed)
bool updateAppList(QNetworkAccessManager* nam, bool& changed)
{
NvHTTP http(m_Computer);
NvHTTP http(m_Computer, nam);
QVector<NvApp> appList;
@@ -81,6 +81,14 @@ private:
setServiceLevel(QThread::QualityOfService::Eco);
#endif
// Share the QNetworkAccessManager to conserve resources when polling.
// Each instance creates a worker thread, so sharing them ensures that
// we are not spamming a new thread for every single polling attempt.
//
// Since QThread inherit the priority of the current thread, this also
// ensures that the NAM's worker thread will inherit our lower priority.
QNetworkAccessManager nam;
// Always fetch the applist the first time
int pollsSinceLastAppListFetch = POLLS_PER_APPLIST_FETCH;
while (!isInterruptionRequested()) {
@@ -93,7 +101,7 @@ private:
return;
}
if (tryPollComputer(address, stateChanged)) {
if (tryPollComputer(&nam, address, stateChanged)) {
if (!wasOnline) {
qInfo() << m_Computer->name << "is now online at" << m_Computer->activeAddress.toString();
}
@@ -124,7 +132,7 @@ private:
stateChanged = false;
}
if (updateAppList(stateChanged)) {
if (updateAppList(&nam, stateChanged)) {
pollsSinceLastAppListFetch = 0;
}
}