Dashboard reporting 100% cpu load though idle

P3R · Jul 28, 2019, 9:08 PM

Enable AES-NI CPU-based acceleration found at System, Advanced, Miscellaneous, Cryptographic Hardware.

stephenw10 · Jul 28, 2019, 10:50 PM

It's not running at 100% if it's not using turbo mode (3101). Unless that's disabled.

That shows nothing though. Run at the command line top -aSH. Let it run for 5s or so then hit Q to quit. Paste the output here.

About the only thing that can use all CPU cycles when it would otherwise be idle is device polling but you would have to try hard to enable that.

Steve

danchapman84 · Jul 29, 2019, 2:02 AM

[2.4.4-RELEASE][admin@pfSense.localdomain]/root: top -aSH
last pid: 17999; load averages: 0.12, 0.07, 0.02 up 0+00:03:10 22:01:34
158 processes: 5 running, 134 sleeping, 19 waiting
CPU: 0.0% user, 0.0% nice, 0.0% system, 0.0% interrupt, 100% idle
Mem: 70M Active, 49M Inact, 182M Wired, 15M Buf, 7314M Free
Swap: 3979M Total, 3979M Free

PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
11 root 155 ki31 0K 64K CPU2 2 3:08 100.00% [idle{idle: cp
11 root 155 ki31 0K 64K CPU1 1 3:07 100.00% [idle{idle: cp
11 root 155 ki31 0K 64K CPU3 3 3:09 99.98% [idle{idle: cp
11 root 155 ki31 0K 64K RUN 0 3:10 99.94% [idle{idle: cp
12 root -60 - 0K 304K WAIT 3 0:00 0.04% [intr{swi4: cl
11107 root 20 0 7812K 4204K CPU0 0 0:00 0.03% top -aSH
30 root 16 - 0K 16K syncer 2 0:00 0.01% [syncer]
19 root -16 - 0K 16K pftm 1 0:00 0.01% [pf purge]
0 root -92 - 0K 432K - 3 0:00 0.00% [kernel{em0 qu
90829 root 20 0 12904K 8128K select 3 0:00 0.00% sshd: admin@pt
28824 root 20 0 6900K 2328K nanslp 1 0:00 0.00% [dpinger{dping
66494 dhcpd 20 0 12580K 7480K select 1 0:00 0.00% /usr/local/sbi
20 root -16 - 0K 16K - 2 0:00 0.00% [rand_harvestq
46245 root 20 0 12400K 12520K select 2 0:00 0.00% /usr/local/sbi
28824 root 20 0 6900K 2328K sbwait 0 0:00 0.00% [dpinger{dping
86751 root 20 0 6400K 2556K select 1 0:00 0.00% /usr/sbin/sysl

stephenw10 · Jul 29, 2019, 1:54 PM

Ok, so that's running at 100% idle. I see no problem there has it changed?

Where exactly were you seeing 100% CPU load?

Steve

danchapman84 · Jul 29, 2019, 2:47 PM

I thought the "current" on "CPU Type" was the load. What is it?

Gertjan · Jul 29, 2019, 2:58 PM

That means that the actual clock speed is "3100".
It's probably executing the NOP instruction at light speed.

danchapman84 · Jul 29, 2019, 3:22 PM

So is this normal behavior?

Gertjan · Jul 29, 2019, 3:26 PM

Yep.

danchapman84 · Jul 29, 2019, 3:28 PM

Okay the only reason I ask is because it sounds like the CPU is running at full load.

stephenw10 · Jul 29, 2019, 4:13 PM

Try enabling powerd in Sys > Adv > Misc.

That CPU should have Speedstep if it's configured correctly in the BIOS. That should save some power and will at least show varying clock speed. You might also get the full turbo speed. That will show as 3101MHz, the +1MHz being turbo enabled. That's actually up to 3400MHz for that CPU.

Steve