[Bug 225584] Various compile process hang on Ryzen, but not on Intel

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225584

--- Comment #8 from Mark Millard <marklmi26-fbsd at yahoo.com> ---
I got a different example:

Threadripper 1950X context, head -r327485 doing a adm64 -> aarch64
cross build of ports: hung up in uwait. The context is also:
Running under Hyper-V (from a Windows 10 Pro context). The context
has a non-debug kernel (my usual). poudriere-devel's jail was
built with: -a arm64.aarch64 -x in use.

Part of the reason for reporting: it indicates that the problem
is not all that recent relative to FreeBSD head versions. Also
the under-Hyper-V context is likely unusual and so might give
someone knowledgable some context based on its distinctions
not preventing the issue.

This is the first such hangup that I've seen and I've been
running -r327485 for some time. I've done several updates to
port builds for native (amd64), armv7, and aarch64 under this
version of head.

Top details for processes associated with the poudriere-devel
run:

  PID USERNAME       THR PRI NICE   SIZE    RES   SWAP STATE   C   TIME     CPU
COMMAND
73211 root             3  52    0   270M 39648K     0K uwait  23   0:00   0.00%
[qemu-aarch64-static]
73210 root             2  52    0   243M 31024K     0K wait   16   0:00   0.00%
/usr/local/bin/qemu-aarch64-static clang++ -o ipc_sysv main.o -L/usr/local/lib
73088 root             1  20    0  9984K  1280K     0K wait    5   0:00   0.00%
make
64988 root             2  20    0   257M 38720K     0K piperd  1   0:07   0.00%
[qemu-aarch64-static]
64487 root             1  52    0 10544K  1848K     0K wait    2   0:00   0.00%
[sh]
64481 root             1  52    0 10192K  1760K     0K wait   27   0:00   0.00%
[sh]
64432 root             1  20    0 10380K  1804K     0K wait   19   0:00   0.00%
/usr/bin/make -C /usr/ports/x11-toolkits/qt5-gui configure
64431 root             1  44    0 12824K  3760K     0K wait   18   0:00   0.00%
sh: poudriere[FBSDFSSDjailCortexA53-default][02]: build_pkg (qt5-gui-5.9.4_1)
(sh)
50049 root             1  20    0 12824K  3768K     0K select 21   0:00   0.00%
sh: poudriere[FBSDFSSDjailCortexA53-default][02]: build_pkg (qt5-gui-5.9.4_1)
(sh)
12174 root             1  42    0 12824K  3756K     0K piperd 21   0:01   0.00%
sh -e /usr/local/share/poudriere/bulk.sh -jFBSDFSSDjailCortexA53 -w -f
/root/cortexA53-origins.txt
94665 root             1  52    0 12824K  3712K     0K nanslp 20   0:27   0.77%
sh -e /usr/local/share/poudriere/bulk.sh -jFBSDFSSDjailCortexA53 -w -f
/root/cortexA53-origins.txt
94448 root             1  52    0 12824K  3752K     0K select 12   0:03   0.00%
sh -e /usr/local/share/poudriere/bulk.sh -jFBSDFSSDjailCortexA53 -w -f
/root/cortexA53-origins.txt

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