<![CDATA[Help My CPU Usage is high]]>Hello Everybody is there something to worry if my cpu usage is reaching aproximately 87% going up but states are stable to 500/10000  Memory usage is 7% and swap size is not increasing is this normal for a single core processor?

]]>https://forum.netgate.com/topic/34815/help-my-cpu-usage-is-highRSS for NodeSun, 15 Mar 2026 02:58:06 GMTFri, 24 Jun 2011 12:20:30 GMT60<![CDATA[Reply to Help My CPU Usage is high on Sat, 25 Jun 2011 08:00:08 GMT]]>Your ACPI is broken (over 70,000 interrupts a second).

Here's interrupt rates from my system (which does have ACPI enabled):

vmstat -i

interrupt                          total      rate
irq0: clk                      143773392        999
irq1: atkbd0                          96          0
irq7: ath0 uhci1+              13672559        95
irq8: rtc                      18401627        127
irq10: rl0 ehci0                9685262        67
irq11: vr0 uhci0                4806754        33
irq14: ata0                      310276          2
irq15: ata1                          194          0
Total                          190650160      1325

Maybe a BIOS update will fix it. Maybe a more up to date build will fix it. Alternatively disable ACPI in the BIOS menu or on startup. You will find some hints on disabling ACPI if you search the forums for ACPI disable.

]]>https://forum.netgate.com/post/284568https://forum.netgate.com/post/284568Sat, 25 Jun 2011 08:00:08 GMT<![CDATA[Reply to Help My CPU Usage is high on Sat, 25 Jun 2011 05:55:01 GMT]]>vmstat -i

interrupt                          total      rate
irq1: atkbd0                          86          0
irq9: acpi0                    106996860      74666
irq15: ata1                        4420          3
irq21: vr0 vr3                      5198          3
irq22: rl0 vr1                    13552          9
irq23: vr2                            1          0
cpu0: timer                      2754581      1922
Total                          109774698      76604

top -S -H

last pid:  9049;  load averages:  1.77,  1.63,  1.14    up 0+00:24:35  13:48:49
88 processes:  2 running, 67 sleeping, 19 waiting
CPU:  1.1% user,  0.0% nice,  0.4% system, 88.5% interrupt, 10.1% idle
Mem: 47M Active, 26M Inact, 30M Wired, 8K Cache, 17M Buf, 889M Free
Swap: 2048M Total, 2048M Free

PID USERNAME PRI NICE  SIZE    RES STATE    TIME  WCPU COMMAND
  24 root    -52    -    0K    8K WAIT    18:34 90.19% irq9: acpi0
  11 root    171 ki31    0K    8K RUN      3:31  9.47% idle: cpu0
9034 root      44    0  3524K  1764K RUN      0:00  0.20% top
  879 root      4    0 44808K 18764K accept  0:14  0.00% php
  875 root      4    0 45832K 20060K accept  0:03  0.00% php
  12 root    -32    -    0K    8K WAIT    0:02  0.00% swi4: clock sio
  871 root      4    0 45832K 19232K accept  0:02  0.00% php
  863 root      4    0  5144K  2936K kqread  0:02  0.00% lighttpd
  867 root      4    0 42760K 16016K accept  0:01  0.00% php
  450 nobody    44    0  3156K  1212K select  0:01  0.00% apinger
1519 root      8  20  3492K  1420K wait    0:00  0.00% sh
    5 root      -8    -    0K    8K -        0:00  0.00% g_down
  36 root    -68    -    0K    8K WAIT    0:00  0.00% irq22: rl0 vr1
    4 root      -8    -    0K    8K -        0:00  0.00% g_up
1595 root      8  20  3156K  796K nanslp  0:00  0.00% check_reload_status
  51 root      20    -    0K    8K syncer  0:00  0.00% syncer

]]>https://forum.netgate.com/post/284564https://forum.netgate.com/post/284564Sat, 25 Jun 2011 05:55:01 GMT<![CDATA[Reply to Help My CPU Usage is high on Fri, 24 Jun 2011 14:16:15 GMT]]>Probably worth noting the fact this machine has NICs that are not showing up in pfSense. This could well be the cause.
http://forum.pfsense.org/index.php/topic,38105.0.html

Steve

]]>https://forum.netgate.com/post/284490https://forum.netgate.com/post/284490Fri, 24 Jun 2011 14:16:15 GMT<![CDATA[Reply to Help My CPU Usage is high on Fri, 24 Jun 2011 13:00:08 GMT]]>Yes, no or maybe (depending on what your box is doing: 87% CPU with no traffic passing through would be high but 87% with busy VPNs and running packages such as snort might be expected).

I suggest you post a screenshot of the output of the pfSense shell commands


# vmstat -i
# top -S -H

```(type _q_ when you have the screenshot of top output to quit top.)
]]>https://forum.netgate.com/post/284480https://forum.netgate.com/post/284480Fri, 24 Jun 2011 13:00:08 GMT