Public bug reported:
Linux ubuntu 5.0.0-1006-raspi2 #6-Ubuntu SMP Thu Apr 11 18:04:26 UTC
2019 aarch64 aarch64 aarch64 GNU/Linux
I've seen this on rpi2, as well as rpi3 with both armhf and arm64 using the
disco release candidate.
After booting, the load average stays quite high, typically over 4.0. This
persists, even if I leave it idle for several hours:
ubuntu@ubuntu:~$ w
19:44:05 up 2:22, 1 user, load average: 4.16, 4.03, 4.01
/proc/loadavg is consistent with these numbers. But when I check top,
there are no obvious culprits hogging the cpu or anything. Typically
everything looks to be <1% cpu usage, with top being the biggest cpu hog
at about 2%. The system doesn't seem too slow (for a pi), but it's
unusual to see such high numbers.
Nothing seems to be swapping:
ubuntu@ubuntu:~$ free -m
total used free shared buff/cache available
Mem: 908 173 422 6 312 707
Swap: 0 0 0
ubuntu@ubuntu:~$ iostat
Linux 5.0.0-1006-raspi2 (ubuntu) 04/17/19 _aarch64_ (4 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
1.64 0.15 1.57 2.06 0.00 94.57
Device tps kB_read/s kB_wrtn/s kB_read kB_wrtn
loop0 0.08 0.50 0.00 354 0
loop1 2.56 3.98 0.00 2805 0
loop2 0.01 0.01 0.00 4 0
mmcblk0 12.70 367.40 705.16 258830 496785
ubuntu@ubuntu:~$ vmstat 1
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
0 0 0 514540 18004 224072 0 0 97 182 2564 76 2 2 94 2 0
0 0 0 514512 18004 224136 0 0 0 2012 10136 142 0 0 94 5 0
0 0 0 514512 18004 224136 0 0 0 0 10117 106 0 0 100 0
0
0 0 0 514512 18004 224136 0 0 0 0 10121 98 0 0 100 0
0
0 0 0 514512 18012 224128 0 0 0 2028 10129 141 0 0 93 7 0
0 0 0 514512 18012 224136 0 0 0 0 10149 135 0 0 100 0
0
0 0 0 514512 18012 224136 0 0 0 0 10108 97 0 0 100 0
0
0 0 0 514512 18012 224136 0 0 0 2012 10125 126 0 0 95 5 0
0 0 0 514512 18012 224136 0 0 0 0 10117 101 0 0 100 0
0
0 1 0 514512 18012 224136 0 0 0 2012 10109 104 0 0 98 2 0
0 0 0 514512 18020 224128 0 0 0 12 10139 150 0 0 96 4 0
0 0 0 514512 18020 224128 0 0 0 0 10108 90 0 0 100 0
0
** Affects: linux-raspi2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1825235
Title:
Load average inexplicably high with 5.0 kernel on rpi
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