[Bug 236096] top shows WCPU numbers greater than 100 percent when using SCHED_BSD
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bugzilla-noreply at freebsd.org
Thu Feb 28 01:12:43 UTC 2019
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236096
Bug ID: 236096
Summary: top shows WCPU numbers greater than 100 percent when
using SCHED_BSD
Product: Base System
Version: 12.0-STABLE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: bin
Assignee: bugs at FreeBSD.org
Reporter: ian at FreeBSD.org
After switching from SCHED_ULE to SCHED_4BSD I immediately noticed that top
displays wildly inaccurate numbers for WCPU. If you switch the display to
un-weighted CPU the numbers are mostly right (rarely you'll see a 101% type
number). This is on a 6-core/12-thread system running make universe:
last pid: 93675; load averages: 11.55, 12.01, 11.34 up 0+09:47:22 18:07:54
277 processes: 12 running, 265 sleeping
CPU: 0.3% user, 71.7% nice, 5.8% system, 0.1% interrupt, 22.2% idle
Mem: 2727M Active, 6622M Inact, 144M Laundry, 1978M Wired, 1174M Buf, 533M Free
Swap: 32G Total, 32G Free
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
93198 ilepore 1 95 20 101M 71M CPU6 6 0:02 1669.79% cc
93380 ilepore 1 95 20 80M 50M RUN 8 0:01 1092.95% cc
93366 ilepore 1 95 20 80M 51M CPU2 2 0:01 1090.72% cc
93381 ilepore 1 95 20 80M 50M CPU0 0 0:01 1075.67% cc
93365 ilepore 1 95 20 80M 50M CPU10 10 0:01 1075.13% cc
93367 ilepore 1 95 20 80M 50M CPU5 5 0:01 1031.28% cc
93378 ilepore 1 95 20 80M 50M CPU9 9 0:01 1027.59% cc
93379 ilepore 1 95 20 80M 50M CPU7 7 0:01 1026.13% cc
93324 ilepore 1 95 20 11M 1920K select 8 0:00 22.64% make
93329 ilepore 1 95 20 11M 1916K select 8 0:00 22.53% make
93328 ilepore 1 95 20 11M 1920K select 11 0:00 22.10% make
93302 ilepore 1 95 20 11M 1916K select 8 0:00 22.02% make
93308 ilepore 1 95 20 11M 1920K select 5 0:00 19.93% make
93233 ilepore 1 93 20 11M 1920K select 2 0:00 17.88% make
93298 ilepore 1 95 20 11M 1920K select 2 0:00 16.95% make
93353 ilepore 1 8 20 66M 35M wait 2 0:00 4.06% cc
93377 ilepore 1 8 20 66M 35M wait 6 0:00 3.95% cc
93376 ilepore 1 8 20 66M 35M wait 6 0:00 3.90% cc
revolution > uname -a
FreeBSD revolution.hippie.lan 12.0-STABLE FreeBSD 12.0-STABLE r342853
REVOLUTION12 amd64
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