Ryzen issues on FreeBSD ?

[Mike Tancsa]

On 1/27/2018 3:23 AM, Don Lewis wrote:
> 
> I just ran into this for this first time with samba46.  I kicked of a
> ports build this evening before leaving for several hours.  When I
> returned, samba46 had failed with a build runaway.  I just tried again
> and I see python stuck in the usem state.  This is what I see with
> procstat -k:

Hmmm, is this indicative of a processor bug or a FreeBSD bug or its
indeterminate at this point ?

> 
>   PID    TID COMM                TDNAME              KSTACK                       
> 90692 100801 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 100824 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 100857 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 100956 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 100995 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 101483 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 101538 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 101549 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 101570 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 101572 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 101583 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 101588 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 101593 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 101610 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 101629 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_lock_umutex __umtx_op_wait_umutex amd64_syscall fast_syscall_common 
> 90692 101666 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 90692 102114 python2.7           -                   mi_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_sem2_wait __umtx_op_sem2_wait amd64_syscall fast_syscall_common 
> 
> and procstat -t:
> 
>   PID    TID COMM                TDNAME              CPU  PRI STATE   WCHAN    
> 90692 100801 python2.7           -                    -1  124 sleep   usem      
> 90692 100824 python2.7           -                    -1  124 sleep   usem      
> 90692 100857 python2.7           -                    -1  124 sleep   usem      
> 90692 100956 python2.7           -                    -1  125 sleep   usem      
> 90692 100995 python2.7           -                    -1  124 sleep   usem      
> 90692 101483 python2.7           -                    -1  124 sleep   usem      
> 90692 101538 python2.7           -                    -1  125 sleep   usem      
> 90692 101549 python2.7           -                    -1  124 sleep   usem      
> 90692 101570 python2.7           -                    -1  124 sleep   usem      
> 90692 101572 python2.7           -                    -1  124 sleep   usem      
> 90692 101583 python2.7           -                    -1  125 sleep   usem      
> 90692 101588 python2.7           -                    -1  124 sleep   usem      
> 90692 101593 python2.7           -                    -1  123 sleep   usem      
> 90692 101610 python2.7           -                    -1  124 sleep   usem      
> 90692 101629 python2.7           -                    -1  125 sleep   umtxn     
> 90692 101666 python2.7           -                    -1  124 sleep   usem      
> 90692 102114 python2.7           -                    -1  152 sleep   usem   
> 
> The machine isn't totally idle.  The last pid value in top increases by
> about 40 every two seconds.  Looks like it might be poudriere polling
> something ...
> 
> 
> 


-- 
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike at sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada   http://www.tancsa.com/