https://bugs.kde.org/show_bug.cgi?id=364061
Bug ID: 364061
Summary: plasmashell using 100% CPU time
Product: plasmashell
Version: 5.5.5
Platform: Fedora RPMs
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: k...@davidedmundson.co.uk
Reporter: c...@redhat.com
CC: bhus...@gmail.com, plasma-b...@kde.org
Randomly plasmashell will start using 100% CPU time, causing noticeable
performance and usability issues (such as the mouse skipping around).
Restarting plasmashell tends to fix the issue until it happens again.
I don't use any "3rd-party" widgets, only those that come with
plasma-workstation, on the default panel. I do, however, have two extra panels,
which provide a simple task manager for my 2nd and 3rd displays.
Reproducible: Sometimes
Steps to Reproduce:
Issue seems to occur randomly
Actual Results:
Plasmashell hordes CPU time
Expected Results:
Plasmashell shouldn't be hording CPU time
Backtrace taken while it was happening:
(gdb) thread apply all bt
Thread 8 (Thread 0x7f00e8596700 (LWP 3412)):
#0 0x00000037952f757d in poll () at ../sysdeps/unix/syscall-template.S:81
#1 0x0000003798e0a182 in _xcb_conn_wait (__timeout=-1, __nfds=1,
__fds=0x7f00e8595bc0) at /usr/include/bits/poll2.h:46
#2 0x0000003798e0a182 in _xcb_conn_wait (c=c@entry=0x1444760,
cond=cond@entry=0x14447a0, vector=vector@entry=0x0, count=count@entry=0x0) at
xcb_conn.c:459
#3 0x0000003798e0bc77 in xcb_wait_for_event (c=0x1444760) at xcb_in.c:648
#4 0x00007f00e9493da9 in QXcbEventReader::run() (this=0x1452cb0) at
qxcbconnection.cpp:1255
#5 0x0000003a65ea33de in QThreadPrivate::start(void*) (arg=0x1452cb0) at
thread/qthread_unix.cpp:331
#6 0x0000003795a07555 in start_thread (arg=0x7f00e8596700) at
pthread_create.c:333
#7 0x0000003795302ded in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
Thread 7 (Thread 0x7f00e602f700 (LWP 3539)):
#0 0x00000037952f757d in poll () at ../sysdeps/unix/syscall-template.S:81
#1 0x0000003797649dbc in g_main_context_iterate (priority=2147483647, n_fds=1,
fds=0x7f00d8003070, timeout=<optimized out>, context=0x7f00d8000990) at
gmain.c:4103
#2 0x0000003797649dbc in g_main_context_iterate
(context=context@entry=0x7f00d8000990, block=block@entry=1,
dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3 0x0000003797649ecc in g_main_context_iteration (context=0x7f00d8000990,
may_block=may_block@entry=1) at gmain.c:3869
#4 0x0000003a660daeaf in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f00d80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5 0x0000003a66081eca in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7f00e602eca0, flags=..., flags@entry=...) at
kernel/qeventloop.cpp:204
#6 0x0000003a65e9e434 in QThread::exec() (this=this@entry=0x1534b60) at
thread/qthread.cpp:503
#7 0x0000003a730d99b5 in QQmlThreadPrivate::run() (this=0x1534b60) at
/usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/qml/qml/ftw/qqmlthread.cpp:141
#8 0x0000003a65ea33de in QThreadPrivate::start(void*) (arg=0x1534b60) at
thread/qthread_unix.cpp:331
#9 0x0000003795a07555 in start_thread (arg=0x7f00e602f700) at
pthread_create.c:333
#10 0x0000003795302ded in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
Thread 6 (Thread 0x7f00dcc9c700 (LWP 3556)):
#0 0x0000003795a0c540 in pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1 0x00007f00dfa066da in radeon_drm_cs_emit_ioctl (mtx=0x1661120,
cond=0x1661148) at ../../../../../include/c11/threads_posix.h:154
#2 0x00007f00dfa066da in radeon_drm_cs_emit_ioctl (sema=0x1661120) at
../../../../../src/gallium/auxiliary/os/os_thread.h:259
#3 0x00007f00dfa066da in radeon_drm_cs_emit_ioctl
(param=param@entry=0x1660df0) at radeon_drm_winsys.c:636
#4 0x00007f00dfa05e37 in impl_thrd_routine (p=<optimized out>) at
../../../../../include/c11/threads_posix.h:87
#5 0x0000003795a07555 in start_thread (arg=0x7f00dcc9c700) at
pthread_create.c:333
#6 0x0000003795302ded in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
Thread 5 (Thread 0x7f00d4a2c700 (LWP 3563)):
#0 0x00000037952f757d in poll () at ../sysdeps/unix/syscall-template.S:81
#1 0x0000003797649dbc in g_main_context_iterate (priority=2147483647, n_fds=1,
fds=0x7f00d0002e70, timeout=<optimized out>, context=0x7f00d0000990) at
gmain.c:4103
#2 0x0000003797649dbc in g_main_context_iterate
(context=context@entry=0x7f00d0000990, block=block@entry=1,
dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3 0x0000003797649ecc in g_main_context_iteration (context=0x7f00d0000990,
may_block=may_block@entry=1) at gmain.c:3869
#4 0x0000003a660daeaf in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f00d00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5 0x0000003a66081eca in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7f00d4a2bca0, flags=..., flags@entry=...) at
kernel/qeventloop.cpp:204
#6 0x0000003a65e9e434 in QThread::exec() (this=this@entry=0x172a110) at
thread/qthread.cpp:503
#7 0x0000003a730d99b5 in QQmlThreadPrivate::run() (this=0x172a110) at
/usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/qml/qml/ftw/qqmlthread.cpp:141
#8 0x0000003a65ea33de in QThreadPrivate::start(void*) (arg=0x172a110) at
thread/qthread_unix.cpp:331
#9 0x0000003795a07555 in start_thread (arg=0x7f00d4a2c700) at
pthread_create.c:333
#10 0x0000003795302ded in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
Thread 4 (Thread 0x7f00cf059700 (LWP 3573)):
#0 0x00000037952f757d in poll () at ../sysdeps/unix/syscall-template.S:81
#1 0x0000003797649dbc in g_main_context_iterate (priority=2147483647, n_fds=1,
fds=0x7f00c8003070, timeout=<optimized out>, context=0x7f00c8000990) at
gmain.c:4103
#2 0x0000003797649dbc in g_main_context_iterate
(context=context@entry=0x7f00c8000990, block=block@entry=1,
dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3 0x0000003797649ecc in g_main_context_iteration (context=0x7f00c8000990,
may_block=may_block@entry=1) at gmain.c:3869
#4 0x0000003a660daeaf in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f00c80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5 0x0000003a66081eca in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7f00cf058ca0, flags=..., flags@entry=...) at
kernel/qeventloop.cpp:204
#6 0x0000003a65e9e434 in QThread::exec() (this=this@entry=0x17c83f0) at
thread/qthread.cpp:503
#7 0x0000003a730d99b5 in QQmlThreadPrivate::run() (this=0x17c83f0) at
/usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/qml/qml/ftw/qqmlthread.cpp:141
#8 0x0000003a65ea33de in QThreadPrivate::start(void*) (arg=0x17c83f0) at
thread/qthread_unix.cpp:331
#9 0x0000003795a07555 in start_thread (arg=0x7f00cf059700) at
pthread_create.c:333
#10 0x0000003795302ded in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
Thread 3 (Thread 0x7f00cd6f4700 (LWP 3582)):
#0 0x0000003795a0c540 in pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1 0x0000003a75f85514 in QTWTF::TCMalloc_PageHeap::scavengerThread()
(this=0x3a7626de80) at
/usr/src/debug/qtscript-opensource-src-5.5.1/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2 0x0000003a75f85559 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*)
(context=<optimized out>) at
/usr/src/debug/qtscript-opensource-src-5.5.1/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3 0x0000003795a07555 in start_thread (arg=0x7f00cd6f4700) at
pthread_create.c:333
#4 0x0000003795302ded in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
Thread 2 (Thread 0x7f0046fbb700 (LWP 3748)):
#0 0x00000037952f757d in poll () at ../sysdeps/unix/syscall-template.S:81
#1 0x0000003797649dbc in g_main_context_iterate (priority=2147483647, n_fds=1,
fds=0x7f0040003120, timeout=<optimized out>, context=0x7f0040000990) at
gmain.c:4103
#2 0x0000003797649dbc in g_main_context_iterate
(context=context@entry=0x7f0040000990, block=block@entry=1,
dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3 0x0000003797649ecc in g_main_context_iteration (context=0x7f0040000990,
may_block=may_block@entry=1) at gmain.c:3869
#4 0x0000003a660daecb in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x7f00400008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5 0x0000003a66081eca in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7f0046fbac50, flags=..., flags@entry=...) at
kernel/qeventloop.cpp:204
#6 0x0000003a65e9e434 in QThread::exec() (this=this@entry=0x1af20d0) at
thread/qthread.cpp:503
#7 0x0000003a73ef68d6 in QQuickPixmapReader::run() (this=0x1af20d0) at
/usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/quick/util/qquickpixmapcache.cpp:760
#8 0x0000003a65ea33de in QThreadPrivate::start(void*) (arg=0x1af20d0) at
thread/qthread_unix.cpp:331
#9 0x0000003795a07555 in start_thread (arg=0x7f0046fbb700) at
pthread_create.c:333
#10 0x0000003795302ded in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
Thread 1 (Thread 0x7f00f0173900 (LWP 3410)):
#0 0x00000037952f757d in poll () at ../sysdeps/unix/syscall-template.S:81
#1 0x0000003797649dbc in g_main_context_iterate (priority=2147483647, n_fds=9,
fds=0x28758c0, timeout=<optimized out>, context=0x7f00e00016f0) at gmain.c:4103
#2 0x0000003797649dbc in g_main_context_iterate
(context=context@entry=0x7f00e00016f0, block=block@entry=1,
dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3 0x0000003797649ecc in g_main_context_iteration (context=0x7f00e00016f0,
may_block=may_block@entry=1) at gmain.c:3869
#4 0x0000003a660daeaf in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=0x149a000, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5 0x0000003a66081eca in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7ffe9e02d2d0, flags=..., flags@entry=...) at
kernel/qeventloop.cpp:204
#6 0x0000003a66089fac in QCoreApplication::exec() () at
kernel/qcoreapplication.cpp:1229
#7 0x0000003a674e756c in QGuiApplication::exec() () at
kernel/qguiapplication.cpp:1527
#8 0x0000003a68d50855 in QApplication::exec() () at
kernel/qapplication.cpp:2976
#9 0x00000000004314da in main(int, char**) (argc=2, argv=<optimized out>) at
../../shell/main.cpp:181
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