https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=232704
Bug ID: 232704
Summary: [regresion] top -SH wrongly shows CPU/WCPU on
fully-loaded system
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: b...@freebsd.org
Reporter: l...@freebsd.org
top -SH on 13-CURRENT (r339662) doesn't show NIC interrupts.
Here is screenshot under high network load, It could be seen, that 50% (one
core of dual-core machine) is consumed by system, but there is no
process/thread which consumes CPU:
# top -HSIzts1
last pid: 3261; load averages: 0.60, 0.26, 0.23
up 0+12:55:34 13:17:05
117 threads: 3 running, 101 sleeping, 13 waiting
CPU: 0.0% user, 0.0% nice, 50.0% system, 0.0% interrupt, 50.0% idle
Mem: 4448K Active, 15M Inact, 198M Wired, 20M Buf, 3716M Free
Swap:
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
0 root -76 - 0 2816K - 1 0:28 0.08%
kernel{if_config_tqg_0}
11 root -60 - 0 1664K WAIT 1 0:23 0.07% intr{swi4:
clock (0)}
3169 lev 20 0 17M 7740K select 1 0:00 0.02% sshd
698 root 20 0 18M 18M select 1 0:03 0.01% ntpd{ntpd}
6 root -16 - 0 128K - 1 0:02 0.00%
rand_harvestq
16 root -16 - 0 384K psleep 1 0:02 0.00%
pagedaemon{dom0}
18 root -16 - 0 384K qsleep 1 0:01 0.00%
bufdaemon{bufdaemon}
795 root -16 - 0 128K nfscl 1 0:00 0.00% nfscl
754 root 52 0 10M 2696K rpcsvc 1 0:00 0.00%
nfscbd{nfscbd: master}
19 root 16 - 0 128K syncer 1 0:01 0.00% syncer
16 root -16 - 0 384K umarcl 1 0:00 0.00%
pagedaemon{uma}
20 root -16 - 0 128K vlruwt 1 0:00 0.00% vnlru
18 root -16 - 0 384K - 1 0:00 0.00%
bufdaemon{bufspacedaemon-0}
18 root -16 - 0 384K - 1 0:00 0.00%
bufdaemon{bufspacedaemon-1}
If load is lower (one core is not consumed), CPU consumption is attributed to
"kernel{if_config_tqg_0}" and/or "kernel{if_config_tqg_1}".
I can not reproduce it on 11.2-STABLE.
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