[Bug 221029] AMD Ryzen: strange compilation failures using poudriere or plain buildkernel/buildworld

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221029

--- Comment #91 from Mark Millard <markmi at dsl-only.net> ---
My first ever compelted attempt at anything
like:

pousriere bulk -w -a

finished. (It started from a prior interrupted
attempt from a prior boot so some things had
already built and the prior failures were
retried.) It reported "62 FAIL" overall, most
for source code rejections based on a preliminary
look. Few Signals.

But when I went to look at dmesg -a there
were lots of Signals there:

FBSDx6411SL# dmesg -a | grep "^pid" | cut -d " " -f 3-100 | sort | uniq -c |
less
   1 (a.out), uid 0: exited on signal 11 (core dumped)
   1 (bash), uid 0: exited on signal 11 (core dumped)
   3 (cc), uid 0: exited on signal 11 (core dumped)
   1 (clang), uid 0: exited on signal 11 (core dumped)
   1 (cm3), uid 0: exited on signal 6 (core dumped)
   1 (conftest) is attempting to use unsafe AIO requests - not logging anymore
   1 (conftest), uid 0: exited on signal 10 (core dumped)
   4 (conftest), uid 0: exited on signal 11 (core dumped)
   4 (conftest), uid 0: exited on signal 6 (core dumped)
  76 (fc-cache), uid 0: exited on signal 11 (core dumped)
   4 (gcc), uid 0: exited on signal 11 (core dumped)
  17 (gdk-pixbuf-query-lo), uid 0: exited on signal 11 (core dumped)
 121 (gio-querymodules-64), uid 0: exited on signal 11 (core dumped)
   1 (go), uid 0: exited on signal 5 (core dumped)
  16 (gtk-query-immodules), uid 0: exited on signal 11 (core dumped)
   1 (nm), uid 0: exited on signal 6 (core dumped)
  17 (pango-querymodules-), uid 0: exited on signal 11 (core dumped)
  24 (pctest), uid 0: exited on signal 11 (core dumped)
  24 (pdtest), uid 0: exited on signal 11 (core dumped)
  24 (pstest), uid 0: exited on signal 11 (core dumped)
  24 (pztest), uid 0: exited on signal 11 (core dumped)
   2 (readonly.exe), uid 0: exited on signal 11
   1 (scm), uid 0: exited on signal 11 (core dumped)
   1 (test_26349), uid 0: exited on signal 4 (core dumped)
  15 (try), uid 0: exited on signal 11

How much of the Signal activity is abnormal I do not know.

These are all from the kern.sched.steal_idle=0
type of test context.

Some other odd items in FreeBSD's demsg -a output were:

interrupt storm detected on "irq19:"; throttling interrupt source

Failed to fully fault in a core file segment at VA 0x800641000 with size 0x1000
to be written at offset 0x25000 for process conftest

Failed to fully fault in a core file segment at VA 0x800643000 with size 0x1000
to be written at offset 0x25000 for process a.out



FYI: systat -vmstat indicates "le0" for irq19.

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