process in STOP state

Kostik Belousov kostikbel at gmail.com
Wed Jan 13 14:36:55 UTC 2010


On Wed, Jan 13, 2010 at 08:03:12AM -0500, Gardner Bell wrote:
> Kostik Belousov wrote:
> >On Tue, Jan 12, 2010 at 06:15:31PM -0500, Gardner Bell wrote:
> >>Hello,
> >>
> >>Just updated my 8.0-STABLE desktop to r202128 the other day and can no 
> >>longer run certain windows executables through wine without them almost 
> >>immediately entering the STOP state and using 100% CPU for a short 
> >>period of time.  Has anyone else ran into a similar issue lately?
> >>
> >>I'm able to get the program to continue as normal by attaching the pid 
> >>trough gdb, but would for obvious reasons prefer not to do that.  Any 
> >>help trying to find the underlying cause would be appreciated as this 
> >>has not been a problem with revisions previous to r202128.
> >
> >You can check whether the process is multithreaded (most likely, it is),
> >and, if so, what is the state of different threads. procstat -t <pid>
> >and then procstat -k <pid> would probably give some information for
> >the start.
> 
> Here's the output from procstat -k and -t.  I've compiled my kernel with 
> KDB and DDB support if there is anything needed from that.
> 
>   PID    TID COMM             TDNAME           CPU  PRI STATE   WCHAN
> 44900 100162 wine             initial thread     1  160 stop    -
> 44900 100178 wine             -                  1  131 stop    -
> 44900 100179 wine             -                  1  140 stop    -
> 44900 100180 wine             -                  0  160 stop    piperd
> 44900 100182 wine             -                  1  160 stop    select
> 44900 100183 wine             -                  0  160 stop    -
> 44900 100184 wine             -                  0  160 stop    -
> 44900 100185 wine             -                  1  160 stop    -
> 44900 100186 wine             -                  0  160 stop    -
> 44900 100190 wine             -                  0  160 stop    -
> 44900 100191 wine             -                  0  160 stop    piperd
> 44900 100192 wine             -                  1  160 stop    -
> 44900 100194 wine             -                  0  160 stop    -
> 44900 100195 wine             -                  0  141 stop    piperd
> 44900 100200 wine             -                  1  160 stop    -
> 44900 100201 wine             -                  1  160 stop    -
> 44900 100202 wine             -                  0  160 stop    piperd
> 44900 100203 wine             -                  1  160 stop    piperd
> 44900 100204 wine             -                  1  160 stop    piperd
> 44900 100205 wine             -                  0  160 stop    -
> 44900 100206 wine             -                  0  160 stop    -
> 
> %procstat -k 44900
>   PID    TID COMM             TDNAME           KSTACK 
> 
> 44900 100162 wine             initial thread   mi_switch 
> thread_suspend_check as 
>                                                      t doreti_ast
> 44900 100178 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_timedwait_sig 
> _cv_timedwait_sig seltdwait kern_select select 
> 
>       syscall Xint0x80_syscall
> 44900 100179 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_timedwait_sig 
> _cv_timedwait_sig seltdwait kern_select select 
> 
>       syscall Xint0x80_syscall
> 44900 100180 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_wait_sig 
> _sleep pipe_read dofileread kern_readv read syscall 
> 
>            Xint0x80_syscall
> 44900 100182 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_wait_sig 
> _cv_wait_sig seltdwait poll syscall Xint0x80_syscall 
> 
> 
> 44900 100183 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_timedwait_sig 
> _cv_timedwait_sig seltdwait poll syscall Xint0x 
> 
>       80_syscall
> 44900 100184 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_timedwait_sig 
> _cv_timedwait_sig seltdwait kern_select select 
> 
>       syscall Xint0x80_syscall
> 44900 100185 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_timedwait_sig 
> _cv_timedwait_sig seltdwait kern_select select 
> 
>       syscall Xint0x80_syscall
> 44900 100186 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_timedwait_sig 
> _cv_timedwait_sig seltdwait kern_select select 
> 
>       syscall Xint0x80_syscall
> 44900 100190 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_timedwait_sig 
> _cv_timedwait_sig seltdwait kern_select select 
> 
>       syscall Xint0x80_syscall
> 44900 100191 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_wait_sig 
> _sleep pipe_read dofileread kern_readv read syscall 
> 
>            Xint0x80_syscall
> 44900 100192 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_wait_sig 
> _sleep pipe_read dofileread kern_readv read syscall 
> 
>            Xint0x80_syscall
> 44900 100194 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_wait_sig 
> _sleep pipe_read dofileread kern_readv read syscall 
> 
>            Xint0x80_syscall
> 44900 100195 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_wait_sig 
> _sleep pipe_read dofileread kern_readv read syscall 
> 
>            Xint0x80_syscall
> 44900 100200 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_timedwait_sig 
> _sleep kern_kevent kevent syscall Xint0x80_sysc 
> 
>       all
> 44900 100201 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_timedwait_sig 
> _sleep kern_kevent kevent syscall Xint0x80_sysc 
> 
>       all
> 44900 100202 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_wait_sig 
> _sleep pipe_read dofileread kern_readv read syscall 
> 
>            Xint0x80_syscall
> 44900 100203 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_wait_sig 
> _sleep pipe_read dofileread kern_readv read syscall 
> 
>            Xint0x80_syscall
> 44900 100204 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_wait_sig 
> _sleep pipe_read dofileread kern_readv read syscall 
> 
>            Xint0x80_syscall
> 44900 100205 wine             -                mi_switch sleepq_switch 
> sleepq_ca 
>                                        tch_signals sleepq_timedwait_sig 
> _sleep kern_kevent kevent syscall Xint0x80_sysc 
> 
>       all
> 44900 100206 wine             -                mi_switch 
> thread_suspend_switch c 
>                                                      ursig ast doreti_ast
> 

Besides weird formatting of procstat -k output, I do not see anything
wrong in the state of the process. It got SIGSTOP, I am sure. Attaching
gdb helps because debugger gets signal reports instead of target process
getting the signal actions on signal delivery.

The only question is why the process gets SIGSTOP at all.
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