https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289387
Bug ID: 289387
Summary: sysctl values dev.cpu.N.cx_usage are at 100% while
CPUs are mostly idle
Product: Base System
Version: 14.3-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
I observe this condition:
top(1) shows that CPUs are mostly idle:
last pid: 48063; load averages: 12.42, 12.93, 13.43
up 14+09:50:54
09:50:15
276 processes: 10 running, 264 sleeping, 1 stopped, 1 zombie
CPU: 67.7% user, 0.0% nice, 31.5% system, 0.2% interrupt, 0.5% idle
Mem: 2544M Active, 2469M Inact, 1026M Laundry, 7426M Wired, 1507M Buf, 10G Free
ARC: 2360M Total, 736M MFU, 1363M MRU, 191K Anon, 31M Header, 144M Other
1722M Compressed, 3682M Uncompressed, 2.14:1 Ratio
Swap: 64G Total, 21G Used, 43G Free, 33% Inuse
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
6214 yuri 17 0 0 1372G 412M uwait 2 13:08 24.86% chrome
4523 yuri 18 7 0 999M 393M select 2 3:37 11.44% chrome
92078 yuri 12 1 0 467M 97M select 2 96:07 2.67% konsole
86618 yuri 3 1 0 24G 54M select 5 93:53 2.45% Xorg
11339 yuri 74 1 0 4562M 1253M select 5 7:05 2.41%
thunderbird
4571 yuri 11 0 0 377M 155M uwait 6 0:56 1.22% chrome
41458 yuri 1 59 0 14M 2980K select 5 0:00 0.89% make
but these sysctl values are at 100%:
$ sysctl -a | grep cpu | grep cx_usage
dev.cpu.7.cx_usage_counters: 494835355
dev.cpu.7.cx_usage: 100.00% last 33us
dev.cpu.5.cx_usage_counters: 515677514
dev.cpu.5.cx_usage: 100.00% last 2us
dev.cpu.3.cx_usage_counters: 514759375
dev.cpu.3.cx_usage: 100.00% last 2us
dev.cpu.1.cx_usage_counters: 476833129
dev.cpu.1.cx_usage: 100.00% last 16us
dev.cpu.6.cx_usage_counters: 614964207
dev.cpu.6.cx_usage: 100.00% last 23us
dev.cpu.4.cx_usage_counters: 516093923
dev.cpu.4.cx_usage: 100.00% last 1us
dev.cpu.2.cx_usage_counters: 516201030
dev.cpu.2.cx_usage: 100.00% last 36us
dev.cpu.0.cx_usage_counters: 1027762178
dev.cpu.0.cx_usage: 100.00% last 37us
These values appear to be inconsistent with top(1) results.
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