https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253968
--- Comment #5 from Mark Millard <marklmi26-f...@yahoo.com> ---
(In reply to rkoberman from comment #4)
Doing "make fetch" and "make extract" for www/firefox is
something I can try on a 128 GiBYTe RAM ThreadRipper 1950X
that uses 960 GiByte Optane media and is running main
(14-CURRENT) from back on 2021-Feb-08. (Optane does not use
trim and is fast.) UFS2+SU (no J). The example context
predates any recent potential fixes. So . . .
Doing similar "time -l" might happen to expose something
common to the good vs. bad cases for those were the issue
stands out in their context.
# time -l make extract
===> Options unchanged
===> 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.
70.10 real 23.54 user 18.01 sys
77540 maximum resident set size
50 average shared memory size
10 average unshared data size
130 average unshared stack size
37678 page reclaims
0 page faults
0 swaps
12848 block input operations
1175850 block output operations
83 messages sent
79 messages received
0 signals received
1188850 voluntary context switches
1816 involuntary context switches
# time -l rm -fr /wrkdirs/usr/ports/www
17.36 real 0.24 user 6.51 sys
4116 maximum resident set size
8 average shared memory size
4 average unshared data size
134 average unshared stack size
587 page reclaims
0 page faults
0 swaps
2 block input operations
555695 block output operations
0 messages sent
0 messages received
0 signals received
607758 voluntary context switches
0 involuntary context switches
(No other www/ content.) Looks like "block
output operations" and "voluntary context
switches" are what has lots of examples in
this context.
For reference: main 3acea07c1873 based:
# ~/fbsd-based-on-what-freebsd-main.sh
merge-base: 3acea07c1873b1e4042f4a4fa8668745ee59f15b
merge-base: CommitDate: 2021-02-08 19:15:21 +0000
c1845d00f818 (HEAD -> mm-src) mm-src snapshot for mm's patched build in git
context.
3acea07c1873 (pure-src) Restore the augmented strlen commentary
FreeBSD FBSDFHUGE 14.0-CURRENT FreeBSD 14.0-CURRENT mm-src-n244686-c1845d00f818
GENERIC-NODBG amd64 amd64 1400004 1400004
I may be able to do similarly on some aarch64 SSD
based machines (that would have trim involved).
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