Chris Murphy composed on 2020-12-24 23:44 (UTC-0700):
> Felix Miata wrote:
>> Since I've been seeing it on other installations, I timed this one:
>> real 7m31s
>> user 7m8.9s
>> sys 0m30.2s
> I started seeing it with the early 5.9-rc's. But haven't seen it since
> release versions. In my case top shows depmod and weak-modules; and
> many small files being created and destroyed in a loop. [1] But
> haven't seen it in a while or with any of the 5.10 or 5.11 kernels.
> If you aren't seeing those indications: Do you have any 3rd party
> modules that depend on dkms? Are you running a 5.10 series kernel at
> the time, and is sysroot btrfs? [2]
Neither.
> [1]
> Install fatrace and run it with sudo. It works on any file system but
> it doesn't show file sizes, just path to file.
First try on a different F33 host, installing 5.9.15 while running 5.8.18, the
file generated was 41,057K. o_O This one completed in a reasonable short time,
so
I cloned it and system-upgraded to Rawhide with the kernel packages locked. When
complete, I unlocked the kernel packages and did 'time dnf upgrade' on tty3
right
after starting 'fatrace -c -t -o outfile' running on tty4, which installed the
same 5.10rc6 kernel as timed in OP:
real 6m59s
user 6m33s
sys 0m29s
# uname -r
5.9.15-200.fc33.x86_64
# inxi -CSy1
System:
Host: ab85m
Kernel: 5.9.15-200.fc33.x86_64 x86_64
bits: 64
Console: tty 3
Distro: Fedora release 34 (Rawhide)
CPU:
Info: Dual Core
model: Intel Pentium G3220
bits: 64
type: MCP
L2 cache: 3 MiB
Speed: 2278 MHz
min/max: 800/3000 MHz
Core speeds (MHz):
1: 2278
2: 2294
# df /
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda14 8092736 5732939 1946102 75% /
# hdparm -t /dev/sda14
/dev/sda14:
Timing buffered disk reads: 1286 MB in 3.00 seconds = 428.06 MB/sec
The fatrace log is 249,166K. o_O
What next?
--
Evolution as taught in public schools, like religion,
is based on faith, not on science.
Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!
Felix Miata *** http://fm.no-ip.com/
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