Add option to control qBittorrent process memory priority

This is to avoid Windows swapping out other application data from
OS cache and put in torrent data which hinders other program
responsiveness.

The default value "Below normal" is choosen because casual users have
other higher priority apps (such as browser) running and they don't
expect OS to swap out its data. Dedicated seeders most probably will not
have other app running on their system and would expect qbt has
priority over other background services.

The option only has effect on Windows >= 8.
This commit is contained in:
Chocobo1 2019-09-28 14:21:53 +08:00
parent c1e0207454
commit 0f60121b94
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GPG key ID: 210D9C873253A68C
4 changed files with 137 additions and 0 deletions

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@ -61,6 +61,9 @@ enum AdvSettingsRows
{
// qBittorrent section
QBITTORRENT_HEADER,
#if defined(Q_OS_WIN)
OS_MEMORY_PRIORITY,
#endif
// network interface
NETWORK_IFACE,
//Optional network address
@ -151,6 +154,28 @@ void AdvancedSettings::saveAdvancedSettings()
Preferences *const pref = Preferences::instance();
BitTorrent::Session *const session = BitTorrent::Session::instance();
#if defined(Q_OS_WIN)
BitTorrent::OSMemoryPriority prio = BitTorrent::OSMemoryPriority::Normal;
switch (m_comboBoxOSMemoryPriority.currentIndex()) {
case 0:
default:
prio = BitTorrent::OSMemoryPriority::Normal;
break;
case 1:
prio = BitTorrent::OSMemoryPriority::BelowNormal;
break;
case 2:
prio = BitTorrent::OSMemoryPriority::Medium;
break;
case 3:
prio = BitTorrent::OSMemoryPriority::Low;
break;
case 4:
prio = BitTorrent::OSMemoryPriority::VeryLow;
break;
}
session->setOSMemoryPriority(prio);
#endif
// Async IO threads
session->setAsyncIOThreads(m_spinBoxAsyncIOThreads.value());
// File pool size
@ -321,6 +346,33 @@ void AdvancedSettings::loadAdvancedSettings()
addRow(LIBTORRENT_HEADER, QString("<b>%1</b>").arg(tr("libtorrent Section")), labelLibtorrentLink);
static_cast<QLabel *>(cellWidget(LIBTORRENT_HEADER, PROPERTY))->setAlignment(Qt::AlignCenter | Qt::AlignVCenter);
#if defined(Q_OS_WIN)
m_comboBoxOSMemoryPriority.addItems({tr("Normal"), tr("Below normal"), tr("Medium"), tr("Low"), tr("Very low")});
int OSMemoryPriorityIndex = 0;
switch (session->getOSMemoryPriority()) {
default:
case BitTorrent::OSMemoryPriority::Normal:
OSMemoryPriorityIndex = 0;
break;
case BitTorrent::OSMemoryPriority::BelowNormal:
OSMemoryPriorityIndex = 1;
break;
case BitTorrent::OSMemoryPriority::Medium:
OSMemoryPriorityIndex = 2;
break;
case BitTorrent::OSMemoryPriority::Low:
OSMemoryPriorityIndex = 3;
break;
case BitTorrent::OSMemoryPriority::VeryLow:
OSMemoryPriorityIndex = 4;
break;
}
m_comboBoxOSMemoryPriority.setCurrentIndex(OSMemoryPriorityIndex);
addRow(OS_MEMORY_PRIORITY, (tr("Process memory priority (Windows >= 8 only)")
+ ' ' + makeLink("https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/ns-processthreadsapi-memory_priority_information", "(?)"))
, &m_comboBoxOSMemoryPriority);
#endif
// Async IO threads
m_spinBoxAsyncIOThreads.setMinimum(1);
m_spinBoxAsyncIOThreads.setMaximum(1024);