[Libreoffice-bugs] [Bug 127344] Idle LibreOffice consumes 100% CPU on i386

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=127344

--- Comment #10 from Miguel <mjulier at free.fr> ---
I tried on libreoffice-6.2.8.2 (last version available on i386).
I did not find how to install debug symbols, if needed.

I ran with "perf" for 10 seconds, with LibreOffice idle for 1 hour with no
document open, the resulting perf.data is 3.9 MB, do you need it?

Using "perf report", the first lines are:

Samples: 38K of event 'cycles', Event count (approx.): 16381262792              
  Children      Self  Command      Shared Object                Symbol          
+   41,71%     0,00%  soffice.bin  [unknown]                    [k] 00000000   
                     ◆
+   34,83%     3,87%  soffice.bin  [kernel.kallsyms]            [k]
entry_SYSENTER_32                ▒
+   33,43%     1,89%  soffice.bin  [vdso]                       [.]
__kernel_vsyscall                ▒
+   29,76%     1,94%  soffice.bin  [kernel.kallsyms]            [k]
do_fast_syscall_32               ▒
+   24,65%     0,77%  soffice.bin  libglib-2.0.so.0.5800.3      [.]
g_main_context_dispatch          ▒
+   15,87%     0,00%  soffice.bin  libvclplug_gtklo.so          [.] 0xb06a34ec 
                     ▒
+   15,77%     0,02%  soffice.bin  libmergedlo.so               [.]
Scheduler::CallbackTaskScheduling▒
+   15,71%     0,40%  soffice.bin  libglib-2.0.so.0.5800.3      [.]
g_get_current_time               ▒
+   15,59%     0,26%  soffice.bin  libmergedlo.so               [.]
Scheduler::ProcessTaskScheduling ▒
+   15,41%     0,60%  soffice.bin  [kernel.kallsyms]            [k]
__se_sys_gettimeofday            ▒
+   14,43%     0,94%  soffice.bin  [kernel.kallsyms]            [k]
ktime_get_real_ts64              ▒
+   14,11%     0,00%  soffice.bin  libglib-2.0.so.0.5800.3      [.]
g_idle_remove_by_data            ▒
+   14,11%     0,00%  soffice.bin  [unknown]                    [.] 0xb42f2180 
                     ▒
+   13,91%    13,88%  soffice.bin  [kernel.kallsyms]            [k] read_hpet  
                     ▒
+   10,57%     0,00%  soffice.bin  [unknown]                    [k] 0x08c39f50 
                     ▒
+    9,25%     0,00%  soffice.bin  libmergedlo.so               [.] 0xb6f1d66f 
                     ▒
+    7,54%     0,46%  soffice.bin  [kernel.kallsyms]            [k]
__se_sys_socketcall              ▒
+    6,54%     1,05%  soffice.bin  libglib-2.0.so.0.5800.3      [.]
g_main_context_prepare           ▒
+    6,33%     0,12%  soffice.bin  [kernel.kallsyms]            [k]
__sys_recvmsg                    ▒
+    6,29%     0,00%  soffice.bin  libc-2.28.so                 [.]
__libc_start_main                ▒
+    6,29%     0,00%  soffice.bin  soffice.bin                  [.] 0x080485ac 
                     ▒
+    6,29%     0,00%  soffice.bin  libmergedlo.so               [.]
soffice_main                     ▒
+    6,29%     0,00%  soffice.bin  libmergedlo.so               [.] SVMain     
                     ▒
+    6,29%     0,00%  soffice.bin  libmergedlo.so               [.] ImplSVMain 
                     ▒
+    6,29%     0,00%  soffice.bin  libmergedlo.so               [.] 0xb6428c26 
                     ▒
+    6,25%     0,18%  soffice.bin  libmergedlo.so               [.]
Application::Execute             ▒
+    5,74%     0,00%  soffice.bin  libmergedlo.so               [.] 0xb6f287f3 
                     ▒
+    5,55%     0,00%  soffice.bin  libvclplug_gtklo.so          [.] 0xb06a34c7 
                     ▒
+    5,53%     0,00%  soffice.bin  libvclplug_gtklo.so          [.] 0xb06a1bd3 
                     ▒
+    5,25%     0,00%  soffice.bin  libvclplug_gtklo.so          [.] 0xb06a3ff0 
                     ▒
+    5,20%     0,22%  soffice.bin  [kernel.kallsyms]            [k]
___sys_recvmsg                   ▒
+    5,15%     0,24%  soffice.bin  [kernel.kallsyms]            [k]
__se_sys_poll

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