https://bugs.kde.org/show_bug.cgi?id=484323
Kai Krakow <k...@kaishome.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |k...@kaishome.de
--- Comment #36 from Kai Krakow <k...@kaishome.de> ---
I can confirm this for 6.1.1. I'm using 4 monitors, one of them is sometimes
turned off. Perf data looks like this:
# Overhead Command Shared Object Symbol
# ........ ............... ...............................
...........................................................................................................................................................................
#
24.22% kwin_x11 [vdso] [.]
__vdso_clock_gettime
15.66% kwin_x11 libc.so.6 [.] __sched_yield
10.43% kwin_x11 [unknown] [k]
0xffffffff81c00150
1.71% kwin_x11 libc.so.6 [.]
clock_gettime@@GLIBC_2.17
1.46% kwin_x11 libnvidia-glcore.so.555.58 [.]
0x0000000000b00d13
1.24% kwin_x11 libnvidia-glcore.so.555.58 [.]
0x0000000000b00d00
1.02% kwin_x11 libnvidia-glcore.so.555.58 [.]
0x00000000009eea66
0.78% kwin_x11 libnvidia-glcore.so.555.58 [.]
0x00000000009eea61
0.72% kwin_x11 libnvidia-glcore.so.555.58 [.]
0x0000000000a03904
0.71% kwin_x11 libnvidia-glcore.so.555.58 [.]
0x0000000000b00d30
0.68% kwin_x11 libnvidia-glcore.so.555.58 [.]
0x00000000009eea59
It looks like most of the time is spent in a tight loop getting the clock and
yielding. Most of the time is spent outside of kwin_x11 but filtering by dso
shows where it is involved:
# dso: kwin_x11
#
# Total Lost Samples: 0
#
# Samples: 5K of event 'cpu_atom/cycles/Pu'
# Event count (approx.): 2421254389
#
# Overhead Command Symbol
# ........ ...............
...............................................................................................................
#
0.12% kwin_x11 [.] KWin::BlendChanges::isActive
0.07% kwin_x11 [.] QtPrivate::QCallableObject<void
(KWin::ZoomEffect::*)(), QtPrivate::List<>, void>::impl
0.04% kwin_x11 [.] KWin::OutputFrame::presented@plt
0.03% vsync event mon [.] std::chrono::_V2::steady_clock::now@plt
0.03% kwin_x11 [.] KWin::ApplicationX11::metaObject
0.03% kwin_x11 [.] KWin::ContrastEffect::shouldContrast
0.03% kwin_x11 [.] KWin::ContrastEffect::doContrast
0.02% kwin_x11 [.] KWin::ZoomEffect::slotWindowDamaged
0.02% kwin_x11 [.] KWin::GlxLayer::doBeginFrame
0.02% kwin_x11 [.] KWin::PaintData::yTranslation@plt
0.02% kwin_x11 [.] KWin::BlurEffect::blurRegion
0.02% kwin_x11 [.] KWin::EffectsHandler::prePaintScreen@plt
0.02% kwin_x11 [.] KWin::ContrastEffect::isActive
0.02% kwin_x11 [.] KWin::EffectWindow::isDesktop@plt
0.02% kwin_x11 [.] KWin::ContrastEffect::drawWindow
0.02% kwin_x11 [.] KWin::GlxBackend::primaryLayer
0.02% kwin_x11 [.] KWin::SlideEffect::isActive
0.02% kwin_x11 [.] QRegion::end@plt
0.02% vsync event mon [.] KWin::SGIVideoSyncVsyncMonitorHelper::poll
0.02% kwin_x11 [.] KWin::OutputLocatorEffect::isActive
0.01% vsync event mon [.] operator delete@plt
0.01% kwin_x11 [.] KWin::GlxBackend::makeCurrent
0.01% vsync event mon [.] QMetaObject::activate@plt
0.00% vsync event mon [.] QtPrivate::QCallableObject<void
(KWin::SGIVideoSyncVsyncMonitorHelper::*)(), QtPrivate::List<>, void>::impl
# Samples: 1M of event 'cpu_core/cycles/Pu'
# Event count (approx.): 737751025988
#
# Overhead Command Symbol
# ........ ...............
.....................................................................................................................................................................................................................................................................................
.....................................................................................................................................................................
#
0.01% kwin_x11 [.] KWin::BlurEffect::blurRegion
0.00% kwin_x11 [.] KWin::GlxBackend::present
0.00% kwin_x11 [.] KWin::BlurEffect::prePaintWindow
0.00% kwin_x11 [.] QRegion::~QRegion@plt
0.00% kwin_x11 [.] KWin::BlurEffect::blur
0.00% kwin_x11 [.] KWin::GlxBackend::present
0.00% kwin_x11 [.] KWin::GlxBackend::doBeginFrame
0.00% kwin_x11 [.] KWin::GlxContext::makeCurrent
0.00% vsync event mon [.] KWin::SGIVideoSyncVsyncMonitorHelper::poll
0.00% vsync event mon [.] std::chrono::_V2::steady_clock::now@plt
0.00% kwin_x11 [.] KWin::GlxBackend::vblank
0.00% kwin_x11 [.] KWin::ContrastEffect::contrastRegion
0.00% kwin_x11 [.] KWin::ScreenShotEffect::isActive
0.00% kwin_x11 [.] QtPrivate::QCallableObject<void
(KWin::VsyncMonitor::*)(std::chrono::duration<long, std::ratio<1l, 1000000000l>
>), QtPrivate::List<std::chrono::duration<long, std::ratio<1l, 1000000000l> >
>, void>::impl
0.00% kwin_x11 [.] KWin::X11Output::renderLoop
0.00% kwin_x11 [.] KWin::BlurEffect::prePaintScreen
0.00% kwin_x11 [.] QTimer::isActive@plt
0.00% kwin_x11 [.] KWin::KscreenEffect::isActive
0.00% kwin_x11 [.] QRegion::intersects@plt
0.00% kwin_x11 [.] KWin::OutputFrame::presented@plt
0.00% kwin_x11 [.] KWin::OverlayWindowX11::isVisible
0.00% kwin_x11 [.] KWin::OutputLocatorEffect::isActive
0.00% kwin_x11 [.] QRegion::QRegion@plt
0.00% kwin_x11 [.] KWin::ContrastEffect::shouldContrast
0.00% kwin_x11 [.] std::_Hashtable<KWin::EffectWindow*,
std::pair<KWin::EffectWindow* const, KWin::BlurEffectData>,
std::allocator<std::pair<KWin::EffectWindow* const, KWin::BlurEffectData> >,
std::__detail::_Select1st, std::equal_to<KWin::EffectWindow*>,
std::hash<KWin::EffectWindow*>, std::__detail::_Mod_range_hashing,
std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy,
std::__detail::_Hashtable_traits<false, false, true> >::find
0.00% kwin_x11 [.] KWin::GlxBackend::endFrame
0.00% kwin_x11 [.] std::__detail::_Map_base<KWin::Output*,
std::pair<KWin::Output* const, KWin::BlurRenderData>,
std::allocator<std::pair<KWin::Output* const, KWin::BlurRenderData> >,
std::__detail::_Select1st, std::equal_to<KWin::Output*>,
std::hash<KWin::Output*>, std::__detail::_Mod_range_hashing,
std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy,
std::__detail::_Hashtable_traits<false, false, true>, true>::operator[]
0.00% kwin_x11 [.] KWin::GlxPixmapTexture::onDamage
Is this caused by the blur effects of plasma and konsole?
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