https://bugs.kde.org/show_bug.cgi?id=460248
--- Comment #11 from guimarcalsi...@gmail.com --- Unfortunately, I couldn't find a way to get perf data from a specific process, but this is the output of perf top -K: Samples: 184K of event 'cycles', 4000 Hz, Event count (approx.): 22948410615 lost: 0/0 drop: 0/0 Overhead Shared Object Symbol 2,13% libQt5Core.so.5.15.6 [.] QCoreApplicationPrivate::sendThroughApplicationEventFilters 1,65% libc.so.6 [.] malloc 1,56% libc.so.6 [.] cfree 1,46% libc.so.6 [.] __libc_calloc 1,40% libc.so.6 [.] pthread_mutex_lock 1,10% [vdso] [.] __vdso_clock_gettime 0,97% libQt5Core.so.5.15.6 [.] QMetaObject::activate 0,85% libwayland-client.so.0.21.0 [.] wl_proxy_marshal_array_flags 0,78% [vdso] [.] 0x0000000000000695 0,74% libQt5Core.so.5.15.6 [.] QMutex::lock 0,71% libwayland-client.so.0.21.0 [.] wl_display_read_events 0,65% libQt5Core.so.5.15.6 [.] QEventDispatcherUNIX::processEvents 0,61% libc.so.6 [.] clock_gettime 0,61% libQt5Widgets.so.5.15.6 [.] QApplication::notify 0,57% libQt5Core.so.5.15.6 [.] QMutex::unlock 0,57% libffi.so.8.1.1 [.] 0x0000000000002318 0,55% libglib-2.0.so.0.7400.0 [.] g_mutex_lock 0,54% libQt5Core.so.5.15.6 [.] QObjectPrivate::maybeSignalConnected 0,54% libglib-2.0.so.0.7400.0 [.] g_main_context_check 0,49% libQt5Core.so.5.15.6 [.] QObject::~QObject 0,48% libglib-2.0.so.0.7400.0 [.] g_mutex_unlock 0,46% libQt5Core.so.5.15.6 [.] QCoreApplicationPrivate::sendPostedEvents 0,45% libglib-2.0.so.0.7400.0 [.] g_source_ref 0,43% libc.so.6 [.] 0x0000000000153840 0,43% libQt5Widgets.so.5.15.6 [.] QApplicationPrivate::notify_helper 0,41% libc.so.6 [.] pthread_getspecific 0,41% libQt5Core.so.5.15.6 [.] QCoreApplication::notifyInternal2 0,41% libc.so.6 [.] 0x000000000008b472 0,40% perf [.] hpp__sort_overhead 0,39% libc.so.6 [.] pthread_cond_wait 0,38% libc.so.6 [.] pthread_mutex_unlock 0,38% libglib-2.0.so.0.7400.0 [.] g_main_context_prepare 0,38% perf [.] rb_next 0,38% libc.so.6 [.] __poll 0,37% ld-linux-x86-64.so.2 [.] __tls_get_addr libQt5Core.so.5.15.6 [.] QCoreApplicationPrivate::sendThroughApplicationEventFilters is always on top. If I "zoom" into it using the perf tool I get: Samples: 70K of event 'cycles', 4000 Hz, Event count (approx.): 10027589808, DSO: libQt5Core.so.5.15.6 lost: 0/0 drop: 0/0 Overhead Symbol 1,59% [.] QCoreApplicationPrivate::sendThroughApplicationEventFilters 0,82% [.] QMetaObject::activate 0,67% [.] QObjectPrivate::maybeSignalConnected 0,61% [.] 0x000000000029452b 0,53% [.] 0x0000000000346f54 0,52% [.] QMutex::lock 0,48% [.] 0x00000000002bd2f4 0,43% [.] QEventDispatcherUNIX::processEvents 0,37% [.] QObject::~QObject 0,36% [.] QCoreApplication::notifyInternal2 0,35% [.] QMutex::unlock 0,34% [.] 0x00000000002bd2d8 0,32% [.] 0x00000000002bd360 0,30% [.] QCoreApplicationPrivate::sendPostedEvents 0,30% [.] 0x00000000002bd385 0,29% [.] QHashData::nextNode 0,27% [.] QArrayData::allocate 0,25% [.] QObject::event 0,21% [.] QIODevice::read 0,21% [.] 0x00000000002bd096 0,20% [.] 0x00000000002b83ac 0,20% [.] 0x00000000002bd104 0,19% [.] qCalculateBlockSize 0,19% [.] QTimerInfoList::timerWait 0,18% [.] QEventDispatcherUNIXPrivate::activateSocketNotifiers 0,18% [.] QVariant::~QVariant 0,16% [.] QThread::currentThreadId 0,16% [.] QObjectPrivate::~QObjectPrivate 0,15% [.] QEventDispatcherUNIXPrivate::markPendingSocketNotifiers 0,15% [.] QWaitCondition::wakeOne 0,15% [.] QCoreApplicationPrivate::sendThroughObjectEventFilters 0,15% [.] QListData::append 0,15% [.] QEventLoop::processEvents 0,15% [.] QTimerInfoList::activateTimers 0,14% [.] QInternal::activateCallbacks -- You are receiving this mail because: You are watching all bug changes.
