No longer is the problem only observed on ampere2! But this was with
a non-debug, personally built kernel that has some of my now patches.
I'll see if I can replicate the issue with an official pkgbase debug
kernel.


FYI for the replication that I got:

/usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
runs:
/usr/local/bin/dot -c

each such /usr/local/bin/dot is stuck at MWCHAN urdlck .

# poudriere status -b
[main-armv7-poud-default] [2024-07-16_04h27m31s] [parallel_build] Queued: 449 
Built: 433 Failed: 0   Skipped: 0   Ignored: 0   Fetched: 0   Tobuild: 16   
Time: 04:44:38
 ID  TOTAL                            ORIGIN   PKGNAME                          
   PHASE PHASE    TMPFS    CPU% MEM%
[01] 00:59:45 graphics/rubygem-ruby-graphviz | rubygem-ruby-graphviz-1.2.5   
run-depends 00:59:30 1.59 GiB   0% 0.2%
[02] 00:49:59           graphics/p5-GraphViz | p5-GraphViz-2.25            
build-depends 00:49:53 1.45 GiB   0% 0.2%
[03] 00:59:45        graphics/py-pydot@py311 | py311-pydot-2.0.0             
run-depends 00:59:34 1.47 GiB   0% 0.2%
[04] 00:59:45   graphics/py-pygraphviz@py311 | py311-pygraphviz-1.6          
lib-depends 00:59:33 1.47 GiB   0% 0.2%
[05] 00:58:57     graphics/py-graphviz@py311 | py311-graphviz-0.10.1         
run-depends 00:58:49 1.47 GiB   0% 0.2%
[06] 00:59:20                     audio/ganv | ganv-1.8.2_1                  
lib-depends 00:59:10 1.53 GiB   0% 0.2%
[07] 00:59:45                    devel/libr3 | libr3-1.0.0_2                 
lib-depends 00:59:19 1.54 GiB   0% 0.3%
[08] 00:59:45                     net/netmap | netmap-0.1.3_2                
run-depends 00:59:22 1.46 GiB   0% 0.3%

I had started the bulk build via the list:

# more ~/origins/ampere2-failures-armv7.txt
audio/ganv
devel/doxygen
devel/libr3
graphics/p5-GraphViz
graphics/p5-GraphViz2
graphics/oyranos
graphics/pear-Image_GraphViz@php81
graphics/py-graphviz@py311
graphics/py-pydot@py311
graphics/py-pygraphviz@py311
graphics/rubygem-ruby-graphviz
math/ggobi
net-mgmt/librenms
net/netmap
print/dot2tex@py311

# poudriere bulk -j main-armv7-poud `cat ~/origins/ampere2-failures-armv7.txt`
. . .
[00:00:12] Building 449 packages using up to 8 builders
. . .
[03:44:55] [01] [00:18:54] Finished   graphics/graphviz | graphviz-9.0.0_4: 
Success
[03:44:56] [01] [00:00:00] Building   graphics/rubygem-ruby-graphviz | 
rubygem-ruby-graphviz-1.2.5
[03:44:56] [03] [00:00:00] Building   graphics/py-pydot@py311 | 
py311-pydot-2.0.0
[03:44:56] [04] [00:00:00] Building   graphics/py-pygraphviz@py311 | 
py311-pygraphviz-1.6
[03:44:56] [07] [00:00:00] Building   devel/libr3 | libr3-1.0.0_2
[03:44:56] [08] [00:00:00] Building   net/netmap | netmap-0.1.3_2
[03:45:21] [06] [00:09:33] Finished   x11-toolkits/gtkmm24 | gtkmm24-2.24.5_4: 
Success
[03:45:21] [06] [00:00:00] Building   audio/ganv | ganv-1.8.2_1
[03:45:44] [05] [00:13:33] Finished   graphics/ImageMagick6@nox11 | 
ImageMagick6-nox11-6.9.12.77_9,1: Success
[03:45:44] [05] [00:00:00] Building   graphics/py-graphviz@py311 | 
py311-graphviz-0.10.1
[03:54:42] [02] [00:24:53] Finished   print/texlive-base | 
texlive-base-20240312: Success
[03:54:42] [02] [00:00:00] Building   graphics/p5-GraphViz | p5-GraphViz-2.25

In /usr/src/sys/kern/kern_umtx.c there is:

static int
do_rw_rdlock(struct thread *td, struct urwlock *rwlock, long fflag,
    struct _umtx_time *timeout)
{
. . .
                /*
                 * Contention bit is set, before sleeping, increase
                 * read waiter count.
                 */
                rv = fueword32(&rwlock->rw_blocked_readers,
                    &blocked_readers);
                if (rv == 0)
                        rv = suword32(&rwlock->rw_blocked_readers,
                            blocked_readers + 1);
                if (rv == -1) {
                        umtxq_unbusy_unlocked(&uq->uq_key);
                        error = EFAULT;
                        break;
                }
                  while (state & wrflags) {
                        umtxq_lock(&uq->uq_key);
                        umtxq_insert(uq);
                        umtxq_unbusy(&uq->uq_key);
                          error = umtxq_sleep(uq, "urdlck", timeout == NULL ?
                            NULL : &timo);
                          umtxq_busy(&uq->uq_key);
                        umtxq_remove(uq);
                        umtxq_unlock(&uq->uq_key);
                        if (error)
                                break;
                        rv = fueword32(&rwlock->rw_state, &state);
                        if (rv == -1) {
                                error = EFAULT;
                                break;
                        }
                }

. . .



For reference:

# ps -alxdww | less
UID   PID  PPID C PRI NI   VSZ   RSS MWCHAN   STAT TT         TIME COMMAND
. . .
  0 87700  4522 6  20  0 16576  1888 -        T     0      0:00.01 | |   |-- vi 
/usr/local/share/poudriere/jail.sh
  0 91496  4522 4  20  0 15760  4684 select   S+    0      0:06.88 | |   `-- 
/usr/local/libexec/poudriere/sh -e -o pipefail 
/usr/local/share/poudriere/bulk.sh audio/ganv devel/doxygen devel/libr3 
graphics/p5-GraphViz graphics/p5-GraphViz2 graphics/oyranos 
graphics/pear-Image_GraphViz@php81 graphics/py-graphviz@py311 
graphics/py-pydot@py311 graphics/py-pygraphviz@py311 
graphics/rubygem-ruby-graphviz math/ggobi net-mgmt/librenms net/netmap 
print/dot2tex@py311
  0 37688 91496 0  68  0 15760  4700 wait     I     0      0:00.05 | |     |-- 
sh: poudriere[main-armv7-poud-default][01]: build_pkg 
(rubygem-ruby-graphviz-1.2.5) (sh)
  0 47568 37688 0  68  0  6664  3664 wait     IJ    0      0:00.03 | |     | 
`-- /usr/bin/make -C /usr/ports/graphics/rubygem-ruby-graphviz run-depends
  0 47598 47568 6  68  0  5568  2988 wait     IJ    0      0:00.01 | |     |   
`-- /bin/sh /usr/ports/Mk/Scripts/do-depends.sh
  0 47743 47598 6  68  0 11188  8864 wait     IJ    0      0:00.00 | |     |    
 `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 47747 47743 3  20  0 71692 48984 select   SJ    0      0:04.26 | |     |    
   `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 56383 47747 1  68  0 26292 23812 urdlck   IJ    0      0:00.02 | |     |    
     `-- /usr/local/bin/dot -c
  0 37700 91496 6  68  0 15760  4700 wait     I     0      0:00.04 | |     |-- 
sh: poudriere[main-armv7-poud-default][03]: build_pkg (py311-pydot-2.0.0) (sh)
  0 45102 37700 2  68  0  6668  3704 wait     IJ    0      0:00.02 | |     | 
`-- /usr/bin/make -C /usr/ports/graphics/py-pydot FLAVOR=py311 run-depends
  0 45156 45102 4  68  0  5584  2992 wait     IJ    0      0:00.01 | |     |   
`-- /bin/sh /usr/ports/Mk/Scripts/do-depends.sh
  0 45215 45156 4  68  0 11144  8864 wait     IJ    0      0:00.00 | |     |    
 `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 45218 45215 4  20  0 51420 31512 select   SJ    0      0:02.68 | |     |    
   `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 52147 45218 2  68  0 26292 23812 urdlck   IJ    0      0:00.02 | |     |    
     `-- /usr/local/bin/dot -c
  0 37721 91496 1  68  0 15760  4700 wait     I     0      0:00.04 | |     |-- 
sh: poudriere[main-armv7-poud-default][04]: build_pkg (py311-pygraphviz-1.6) 
(sh)
  0 45937 37721 1  68  0  6684  3744 wait     IJ    0      0:00.03 | |     | 
`-- /usr/bin/make -C /usr/ports/graphics/py-pygraphviz FLAVOR=py311 lib-depends
  0 46009 45937 7  68  0  5584  2992 wait     IJ    0      0:00.01 | |     |   
`-- /bin/sh /usr/ports/Mk/Scripts/do-depends.sh
  0 46127 46009 7  68  0 11144  8864 wait     IJ    0      0:00.00 | |     |    
 `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 46129 46127 1  20  0 51384 31548 select   SJ    0      0:02.73 | |     |    
   `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 53311 46129 4  68  0 26292 23812 urdlck   IJ    0      0:00.02 | |     |    
     `-- /usr/local/bin/dot -c
  0 37744 91496 7  45  0 15760  4692 wait     I     0      0:00.04 | |     |-- 
sh: poudriere[main-armv7-poud-default][07]: build_pkg (libr3-1.0.0_2) (sh)
  0 55198 37744 0  50  0  6664  3664 wait     IJ    0      0:00.03 | |     | 
`-- /usr/bin/make -C /usr/ports/devel/libr3 lib-depends
  0 55229 55198 0  68  0  5588  2988 wait     IJ    0      0:00.01 | |     |   
`-- /bin/sh /usr/ports/Mk/Scripts/do-depends.sh
  0 55594 55229 7  68  0 11168  8864 wait     IJ    0      0:00.00 | |     |    
 `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 55596 55594 2  20  0 69796 50180 select   SJ    0      0:04.53 | |     |    
   `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 62753 55596 0  68  0 26292 23812 urdlck   IJ    0      0:00.02 | |     |    
     `-- /usr/local/bin/dot -c
  0 37763 91496 4  29  0 15760  4696 wait     I     0      0:00.05 | |     |-- 
sh: poudriere[main-armv7-poud-default][08]: build_pkg (netmap-0.1.3_2) (sh)
  0 51054 37763 6  36  0  6636  3684 wait     IJ    0      0:00.03 | |     | 
`-- /usr/bin/make -C /usr/ports/net/netmap run-depends
  0 51107 51054 3  68  0  5568  2988 wait     IJ    0      0:00.01 | |     |   
`-- /bin/sh /usr/ports/Mk/Scripts/do-depends.sh
  0 51576 51107 3  68  0 11168  8860 wait     IJ    0      0:00.00 | |     |    
 `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 51580 51576 3  20  0 68220 49432 select   SJ    0      0:04.27 | |     |    
   `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 59063 51580 6  68  0 26292 23808 urdlck   IJ    0      0:00.02 | |     |    
     `-- /usr/local/bin/dot -c
  0 53709 91496 1  68  0 15760  4700 wait     I     0      0:00.04 | |     |-- 
sh: poudriere[main-armv7-poud-default][06]: build_pkg (ganv-1.8.2_1) (sh)
  0 63371 53709 6  68  0  6636  3668 wait     IJ    0      0:00.03 | |     | 
`-- /usr/bin/make -C /usr/ports/audio/ganv lib-depends
  0 63377 63371 1  68  0  5580  2996 wait     IJ    0      0:00.01 | |     |   
`-- /bin/sh /usr/ports/Mk/Scripts/do-depends.sh
  0 63413 63377 4  68  0 11180  8864 wait     IJ    0      0:00.00 | |     |    
 `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 63414 63413 3  20  0 56212 35980 select   SJ    0      0:02.21 | |     |    
   `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 65577 63414 6  68  0 26292 23812 urdlck   IJ    0      0:00.01 | |     |    
     `-- /usr/local/bin/dot -c
  0 63365 91496 3  68  0 15760  4696 wait     I     0      0:00.03 | |     |-- 
sh: poudriere[main-armv7-poud-default][02]: build_pkg (p5-GraphViz-2.25) (sh)
  0 63807 63365 7  68  0  6696  3672 wait     IJ    0      0:00.02 | |     | 
`-- /usr/bin/make -C /usr/ports/graphics/p5-GraphViz build-depends
  0 63808 63807 2  68  0  5568  2988 wait     IJ    0      0:00.01 | |     |   
`-- /bin/sh /usr/ports/Mk/Scripts/do-depends.sh
  0 63833 63808 4  68  0 11188  8864 wait     IJ    0      0:00.00 | |     |    
 `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 63834 63833 7  20  0 67400 48532 select   SJ    0      0:03.52 | |     |    
   `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 66041 63834 2  68  0 26292 23812 urdlck   IJ    0      0:00.02 | |     |    
     `-- /usr/local/bin/dot -c
  0 69974 91496 1  68  0 15760  4700 wait     I     0      0:00.04 | |     |-- 
sh: poudriere[main-armv7-poud-default][05]: build_pkg (py311-graphviz-0.10.1) 
(sh)
  0 73474 69974 5  68  0  6684  3740 wait     IJ    0      0:00.02 | |     | 
`-- /usr/bin/make -C /usr/ports/graphics/py-graphviz FLAVOR=py311 run-depends
  0 73496 73474 6  68  0  5584  2992 wait     IJ    0      0:00.01 | |     |   
`-- /bin/sh /usr/ports/Mk/Scripts/do-depends.sh
  0 73521 73496 7  68  0 11144  8864 wait     IJ    0      0:00.00 | |     |    
 `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 73522 73521 0  20  0 52432 32664 select   SJ    0      0:02.70 | |     |    
   `-- /usr/local/sbin/pkg-static add -A /packages/All/graphviz-9.0.0_4.pkg
  0 76540 73522 3  68  0 26292 23812 urdlck   IJ    0      0:00.02 | |     |    
     `-- /usr/local/bin/dot -c
  0 91907 91496 5  68  0 15760  4492 nanslp   S     0      1:05.17 | |     |-- 
sh: poudriere[main-armv7-poud-default]: html_json_main (sh)
  0 99134 91496 1  40  0 15760  4740 piperd   I     0      0:03.22 | |     `-- 
sh: poudriere[main-armv7-poud-default]: pkg_cacher_main (sh)
  0 23

===
Mark Millard
marklmi at yahoo.com


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