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SystemMonitor: Improve readings for storage and memory

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This commit is contained in:
Michael Zanetti 2022-11-02 00:22:53 +01:00
parent f111b77bc0
commit 7819dff888
1 changed files with 51 additions and 15 deletions
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66
systemmonitor/integrationpluginsystemmonitor.cpp
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@ -91,7 +91,26 @@ void IntegrationPluginSystemMonitor::updateSystemMonitor(Thing *thing)
thing->setStateValue(systemMonitorPercentMemoryStateTypeId, readTotalMemoryUsage()); thing->setStateValue(systemMonitorPercentMemoryStateTypeId, readTotalMemoryUsage());
QStorageInfo storageInfo = QStorageInfo::root(); QStorageInfo storageInfo = QStorageInfo::root();
double percentage = 100.0 * (storageInfo.bytesTotal() - storageInfo.bytesFree()) / storageInfo.bytesTotal(); storageInfo.refresh();
qulonglong total = storageInfo.bytesTotal();
qulonglong free = storageInfo.bytesFree();
qulonglong available = storageInfo.bytesAvailable();
qulonglong used = total - free;
qulonglong usableTotal = used + available;
double percentage = 100.0 * used / usableTotal;
qCDebug(dcSystemMonitor()) << "total" << (total / 1024) << "usableTotal:" << (usableTotal / 1024);
// Debug line as close as possible to "df"
qCDebug(dcSystemMonitor()).noquote() << QString("Storage: %1, Total: %2, Used %3, Avail: %4, Use%: %5, Mounted on: %6")
.arg(QString(storageInfo.device()))
.arg(total / 1024)
.arg(used / 1024)
.arg(available / 1024)
.arg(percentage)
.arg(storageInfo.rootPath());
thing->setStateValue(systemMonitorPercentStorageStateTypeId, percentage); thing->setStateValue(systemMonitorPercentStorageStateTypeId, percentage);
} }
@ -174,23 +193,40 @@ double IntegrationPluginSystemMonitor::readTotalCpuUsage(Thing *thing)
double IntegrationPluginSystemMonitor::readTotalMemoryUsage() double IntegrationPluginSystemMonitor::readTotalMemoryUsage()
{ {
struct sysinfo memInfo; QFile f(QString("/proc/meminfo"));
sysinfo(&memInfo); if (!f.open(QFile::ReadOnly)) {
qCWarning(dcSystemMonitor()).nospace() << "Unable to open " << f.fileName() << ". Cannot read memory usage.";
return false;
}
qulonglong totalPhysicalMem = memInfo.totalram; qulonglong totalPhysicalMem = 0;
// Multiply in next statement to avoid int overflow on right hand side... qulonglong availableMem = 0;
totalPhysicalMem *= memInfo.mem_unit; bool foundTotal = false, foundAvailable = false;
QString line;
while (!(line = f.readLine()).isEmpty()) {
QStringList parts = line.split(":");
if (parts.count() != 2) {
qCWarning(dcSystemMonitor()) << "Unexpected format in" << f.fileName() << ":" << line;
continue;
}
QString name = parts.first();
QString value = parts.last().trimmed().split(" ").first();
if (name == "MemTotal") {
foundTotal = true;
totalPhysicalMem = value.toULongLong();
}
if (name == "MemAvailable") {
foundAvailable = true;
availableMem = value.toULongLong();
}
}
if (!foundTotal || !foundAvailable) {
qCWarning(dcSystemMonitor()) << "Unable to read memory use from" << f.fileName();
return 0;
}
qulonglong physicalMemUsed = (memInfo.totalram - memInfo.freeram - memInfo.bufferram); return 100.0 * (totalPhysicalMem - availableMem) / totalPhysicalMem;
// Multiply in next statement to avoid int overflow on right hand side...
physicalMemUsed *= memInfo.mem_unit;
// qCDebug(dcSystemMonitor()) << "Total RAM" << totalPhysicalMem << "used:" << physicalMemUsed;
return 100.0 * physicalMemUsed / totalPhysicalMem;
} }
bool IntegrationPluginSystemMonitor::readProcessMemoryUsage(qint32 pid, quint32 &total, quint32 &rss, quint32 &shared, double &percentage) bool IntegrationPluginSystemMonitor::readProcessMemoryUsage(qint32 pid, quint32 &total, quint32 &rss, quint32 &shared, double &percentage)