[Bug 224080] ZFS: "arc_dnlc_evicts_thr" + "arc_reclaim_thread" - high CPU load during poudriere build...

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224080

--- Comment #13 from Cy Schubert <cy at FreeBSD.org> ---
Looking at the workloads of my four systems, I'm not entirely convinced
reverting r326346 will make as much difference as removing r326347 did. Though
ARC is more in line with as it was before r326347, MFU fluctuates widely, from
55M to 500M. Better than single digit MB before. I will see if reverting
r326346 makes a difference too.

last pid: 50534;  load averages:  1.32,  0.94,  0.96    up 0+01:05:30  22:07:05
123 processes: 2 running, 121 sleeping
CPU:  1.6% user,  4.2% nice,  5.0% system,  0.6% interrupt, 88.7% idle
Mem: 1018M Active, 1310M Inact, 3670M Wired, 178M Buf, 1763M Free
ARC: 1327M Total, 177M MFU, 651M MRU, 15M Anon, 24M Header, 460M Other
     283M Compressed, 943M Uncompressed, 3.33:1 Ratio
Swap: 12G Total, 12G Free

  PID USERNAME       THR PRI NICE   SIZE    RES STATE   C   TIME    WCPU COMMAN
 2503 root             1  24    0 58704K 35612K select  1   2:16   7.25% Xorg
 2658 cy               5  22    0 93644K 46620K CPU0    0   2:16   6.99% mate-t
50487 root             1   4   10 10476K  1836K select  2   0:00   1.53% make
49701 root             1  52   10 17436K  9024K select  1   0:00   0.16% make
 2591 cy               1  20    0 16804K  6684K select  2   0:02   0.08% xscree
50489 root             1  52   10 11668K  3172K wait    3   0:00   0.08% sh
 2560 cy               1  20    0 21684K  9336K select  0   0:03   0.07% mwm
23860 cy               1  20    0 14168K  4388K CPU3    3   0:01   0.07% top
50486 root             1  52   10 11688K  3176K wait    2   0:00   0.07% sh
25264 root             1  30   10 10224K  1388K select  1   0:00   0.07% make
48259 root             1  30   10 10956K  2336K select  2   0:00   0.06% make
46730 root             1  30   10 11036K  2344K select  1   0:00   0.06% make
 3041 cy               1  20    0 12708K  3704K select  0   0:01   0.05% krlogi
25290 root             1  30   10 11128K  2416K select  2   0:00   0.05% make
49044 root             1  20    0 11040K  2656K select  0   0:00   0.04% moused

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