[Bug 253968] 13.0-BETA4: UFS with journaled soft-updates is three times SLOWER than before

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253968

--- Comment #7 from Mark Millard <marklmi26-fbsd at yahoo.com> ---
(In reply to Mark Millard from comment #6)

[I use -noatime mounts, by the way.]

Given the reports I got a surprise booting the OverDrive 1000
via 13.0-BETA4 and trying the operations on the SSD (not
the boot media this time), evidence of definite changes from
the main (14) vintage that I have things at for normal booting:

# time -l make extract
===>   firefox-85.0.2,2 depends on file: /usr/local/sbin/pkg - found
===> Fetching all distfiles required by firefox-85.0.2,2 for building
===>  Extracting for firefox-85.0.2,2
=> SHA256 Checksum OK for firefox-85.0.2.source.tar.xz.
       93.39 real        55.46 user        34.47 sys
     76576  maximum resident set size
        30  average shared memory size
         4  average unshared data size
       128  average unshared stack size
     26460  page reclaims
         0  page faults
         0  swaps
     15569  block input operations
       994  block output operations
        16  messages sent
        14  messages received
         0  signals received
     16752  voluntary context switches
      1192  involuntary context switches

Vastly fewer block output operations (and less time).

# time -l rm -fr work
       12.74 real         0.29 user         7.80 sys
      3920  maximum resident set size
         8  average shared memory size
         4  average unshared data size
       128  average unshared stack size
       588  page reclaims
         0  page faults
         0  swaps
       644  block input operations
       360  block output operations
         0  messages sent
         0  messages received
         0  signals received
      1093  voluntary context switches
       337  involuntary context switches

So even if there are issues still, apparently some have
been taken care of.

For reference:

# uname -apKU
FreeBSD generic 13.0-BETA4 FreeBSD 13.0-BETA4 #0
releng/13.0-n244592-e32bc253629: Fri Feb 26 08:02:53 UTC 2021    
root at releng1.nyi.freebsd.org:/usr/obj/usr/src/arm64.aarch64/sys/GENERIC  arm64
aarch64 1300139 1300139

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