High Interrupt Rate and CPU Usage

[vermaden]

After clean install of PC-BSD 7.1 (UFS + Journaling) and connecting to WiFi router I got these usage stats at idle:

last pid: 28314;  load averages:  0.23,  0.29,  0.32                                                         up 0+00:26:39  23:30:54
129 processes: 1 running, 128 sleeping
CPU 0:  0.9% user,  0.1% nice,  3.2% system, 40.5% interrupt, 55.3% idle
CPU 1:  0.8% user,  0.0% nice, 17.1% system,  0.0% interrupt, 82.1% idle
Mem: 244M Active, 334M Inact, 204M Wired, 32M Cache, 112M Buf, 1173M Free
Swap: 496M Total, 496M Free
kill edit
  PID USERNAME    THR PRI NICE   SIZE    RES STATE  C   TIME   WCPU COMMAND
 2496 root          1  50    0  3640K  1588K select 0   1:35  8.79% hald-addon-storage
 2997 vermaden      1  47    0 77676K 38088K select 0   1:26  4.49% kded4
 2874 root          1  44    0   321M   313M select 1   0:33  0.00% Xorg

40% interrupt rate and 13% idle CPU usage is imho too much, especially for hald.

My hardware is Dell Latitude D630:

cpu: Intel Core 2 Duo T7300 2.0GHz
ram: 2GB
hdd: 80GB
gfx: Intel X3100
nic: Broadcom 10/100/1000
scr: 14.1" WXGA+ (1440x900)
snd: Sigmatel
wir: Intel 3945 WIFI

[koo5]

intel x3100? look for interupt storms

[vermaden]

intel x3100? look for interupt storms

I did not had ANY problems using Intel X3100 on FreeBSD 7.1-STABLE some time ago, also if I do not connect by WiFi, then interrupt rate is pretty normal, about 0.1% of total system stats, but kde4 still hogs CPU.

[koo5]

i remember when i installed dragonfly the storm was triggered by pluging in eth

[vermaden]

@koo5

Currently I indeed has problems with (very) high interrupt rate on X3100:

# vmstat -i
interrupt                          total       rate
irq1: atkbd0                       22515          4
irq9: acpi0                            1          0
irq12: psm0                        27390          5
irq16: drm0                    819136294     156293
irq17: wpi0                         4151          0
irq18: atapci1                     31780          6
irq19: cbb0+                           2          0
irq20: uhci0 uhci+                     1          0
irq21: hdac0 uhci+                  6977          1
irq22: ehci0 uhci4                    25          0
cpu0: timer                     10480037       1999
irq256: bge0                       18412          3
cpu1: timer                     10470231       1997
Total                          840197816     160312

Maybe because of newer Xorg/Intel driver version, I must verify that on FreeBSD without all PCBSD bloat called KDE4.

[pcfxer]

Any updates sir?

I have an X4500 that is terrible with intel-3d enable, intel and even VESA drivers. Right now the CPU usage is at 60% with VESA drivers and uhci2 is causing the most interrupts but I don't think that is the cause. (maybe though??).

Regards,
Brodey

[vermaden]

Any updates sir?

I have an X4500 that is terrible with intel-3d enable, intel and even VESA drivers. Right now the CPU usage is at 60% with VESA drivers and uhci2 is causing the most interrupts but I don't think that is the cause. (maybe though??).

Regards,
Brodey

Hi,

I havent tried PCBSD/FreeBSD from that time, I recently got more into OpenSolaris and/or NetBSD. X4500 is pretty new (as for BSD standarts), so its support is not so good at this point, IMHO you should report BUGS to http://www.freebsd.org/send-pr.html and contact FreeBSD developers at http://lists.freebsd.org for some patches to try.

[cpet]

[chris@pcbsd]% vmstat -i
interrupt total rate
irq1: atkbd0 42613 1
irq12: psm0 531805 19
irq16: vgapci0+ 1388097 50
irq19: atapci1 67159 2
irq22: hdac0 32849 1
cpu0: timer 52822498 1930
irq256: em0 143370 5
cpu1: timer 52810982 1929
Total 107839373 3940
[chris@pcbsd]%