[Bug 1380848] Re: Apps and services use large amount of CPU after unity8 resets
*** This bug is a duplicate of bug 1394204 *** https://bugs.launchpad.net/bugs/1394204 ** This bug has been marked a duplicate of bug 1394204 dbus daemon spinning with NM AP properties change event -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1380848 Title: Apps and services use large amount of CPU after unity8 resets To manage notifications about this bug go to: https://bugs.launchpad.net/media-hub/+bug/1380848/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1380848] Re: Apps and services use large amount of CPU after unity8 resets
I wonder if we should make it so the whole session is restarted (or even the phone rebooted) if unity8 respawned... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1380848 Title: Apps and services use large amount of CPU after unity8 resets To manage notifications about this bug go to: https://bugs.launchpad.net/media-hub/+bug/1380848/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1380848] Re: Apps and services use large amount of CPU after unity8 resets
I am getting similar symptoms (media-hub-server high cpu) , although I didn't see unity8 restarting (perhaps it did and I didn't notice?). I have attached a tarball of strace (clipped because it was just the same after a point), gdb backtrace and a core file generated from inside gdb for media-hub-server. ** Attachment added: media-hub-server-debug.tar.xz https://bugs.launchpad.net/ubuntu/+source/dbus-cpp/+bug/1380848/+attachment/4252111/+files/media-hub-server-debug.tar.xz -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1380848 Title: [TOPBLOCKER] Apps and services use large amount of CPU after unity8 resets To manage notifications about this bug go to: https://bugs.launchpad.net/media-hub/+bug/1380848/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1380848] Re: Apps and services use large amount of CPU after unity8 resets
We should assign this bug to an overarching component/project as multiple independent services (media-hub, location-service, dbus-daemon) are affected. However, one idea that came to my mind: It might be that a spurious posix signal is causing these issues, probably a SIGHUP somewhere, arising on a thread that the respective signal is not blocked on. I will keep on investigating into that direction. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1380848 Title: Apps and services use large amount of CPU after unity8 resets To manage notifications about this bug go to: https://bugs.launchpad.net/media-hub/+bug/1380848/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1380848] Re: Apps and services use large amount of CPU after unity8 resets
Made the bug more generic, and added dbus-cpp as its a commonly used element that could possibly be related ** Summary changed: - Media-hub-service uses large amount of CPU after unity8 resets + Apps and services use large amount of CPU after unity8 resets ** Also affects: dbus-cpp (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1380848 Title: Apps and services use large amount of CPU after unity8 resets To manage notifications about this bug go to: https://bugs.launchpad.net/media-hub/+bug/1380848/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1380848] Re: Apps and services use large amount of CPU after unity8 resets
** Attachment added: backtrace for locations service when consuming cpu https://bugs.launchpad.net/ubuntu/+source/dbus-cpp/+bug/1380848/+attachment/4250241/+files/locationservice.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1380848 Title: Apps and services use large amount of CPU after unity8 resets To manage notifications about this bug go to: https://bugs.launchpad.net/media-hub/+bug/1380848/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1380848] Re: Apps and services use large amount of CPU after unity8 resets
Just got another unity8 crash and this time system-settings maxing the cpu. Here is the thread dump. It appears it's in a tight loop spawing and exiting threads: (gdb) bt #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) (gdb) t a a bt Thread 15 (Thread 0xb2297450 (LWP 4318)): Cannot access memory at address 0x0 #0 0xb442c840 in ?? () Cannot access memory at address 0x0 #1 0xb444029c in ?? () Cannot access memory at address 0x0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 14 (Thread 0xb2507b40 (LWP 4319)): #0 0xb5e11b76 in ?? () from /lib/arm-linux-gnueabihf/librt.so.1 #1 0xb5e11be2 in ?? () from /lib/arm-linux-gnueabihf/librt.so.1 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 13 (Thread 0xb18ff450 (LWP 4320)): #0 0xb6199554 in __libc_do_syscall () from /lib/arm-linux-gnueabihf/libpthread.so.0 #1 0xb6195192 in pthread_cond_wait@@GLIBC_2.4 () from /lib/arm-linux-gnueabihf/libpthread.so.0 Cannot access memory at address 0x300 #2 0xb235e0a8 in ?? () Cannot access memory at address 0x300 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 12 (Thread 0xb10ff450 (LWP 4321)): #0 0xb6199554 in __libc_do_syscall () from /lib/arm-linux-gnueabihf/libpthread.so.0 #1 0xb6195192 in pthread_cond_wait@@GLIBC_2.4 () from /lib/arm-linux-gnueabihf/libpthread.so.0 Cannot access memory at address 0x300 #2 0xb235e0a8 in ?? () Cannot access memory at address 0x300 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 11 (Thread 0xb08ff450 (LWP 4322)): #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 10 (Thread 0xae9bb450 (LWP 4328)): #0 0xb6242712 in epoll_wait () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb3d20422 in ?? () from /usr/lib/arm-linux-gnueabihf/libdbus-cpp.so.4 #2 0xb3d222be in ?? () from /usr/lib/arm-linux-gnueabihf/libdbus-cpp.so.4 #3 0xb3d2268e in ?? () from /usr/lib/arm-linux-gnueabihf/libdbus-cpp.so.4 ---Type return to continue, or q return to quit--- #4 0xb3d0b92c in core::dbus::Bus::run() () from /usr/lib/arm-linux-gnueabihf/libdbus-cpp.so.4 #5 0xb634f360 in ?? () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 #6 0xb6191f98 in start_thread () from /lib/arm-linux-gnueabihf/libpthread.so.0 #7 0xb624222c in ?? () from /lib/arm-linux-gnueabihf/libc.so.6 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 9 (Thread 0xadf2e450 (LWP 4332)): #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 8 (Thread 0xad433450 (LWP 4335)): #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 7 (Thread 0xacc33450 (LWP 4336)): #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 6 (Thread 0xabd88450 (LWP 4337)): #0 0xb623baa2 in poll () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb5e5c0c0 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 5 (Thread 0xab25d450 (LWP 4342)): #0 0xb6231816 in sched_yield () from /lib/arm-linux-gnueabihf/libc.so.6 #1 0xb3bd6582 in ?? () from /usr/lib/arm-linux-gnueabihf/libmircommon.so.2 #2 0xb634f360 in ?? () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 #3 0xb6191f98 in start_thread () from /lib/arm-linux-gnueabihf/libpthread.so.0 #4 0xb624222c in ?? () from /lib/arm-linux-gnueabihf/libc.so.6 Backtrace stopped: previous frame identical to this frame (corrupt stack?) ---Type return to continue, or q return to quit--- Thread 4 (Thread 0xaaa1d450 (LWP 4343)): #0 0xb6199554 in __libc_do_syscall () from /lib/arm-linux-gnueabihf/libpthread.so.0 #1 0xb6195192 in pthread_cond_wait@@GLIBC_2.4 () from /lib/arm-linux-gnueabihf/libpthread.so.0 #2 0xb6bbc05c in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5 #3 0xb670318c in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Quick.so.5 Backtrace stopped: previous frame identical to this frame (corrupt stack?) Thread 3 (Thread 0xaa21d450 (LWP 4344)): #0 0xb6199554 in __libc_do_syscall () from /lib/arm-linux-gnueabihf/libpthread.so.0 #1 0xb6195192 in pthread_cond_wait@@GLIBC_2.4 ()
[Bug 1380848] Re: Apps and services use large amount of CPU after unity8 resets
I will try to come up with a distilled down test case illustrating that libdbus-cpp is not the cause but a symptom of the issue. Point being that it certainly shows up in the stack traces, but it sits waiting in all of them (specifically for the system settings crash). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1380848 Title: Apps and services use large amount of CPU after unity8 resets To manage notifications about this bug go to: https://bugs.launchpad.net/media-hub/+bug/1380848/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
