Re: High cpu load (dvb_usb_dib0700)

[Jan Korbel <jackc@teptin.net>]

Hello.

I have the same problem. Two tuners "ASUS My Cinema U3000 Mini DVBT Tuner":

Bus 005 Device 004: ID 0b05:171f ASUSTek Computer, Inc.
Bus 005 Device 003: ID 0b05:171f ASUSTek Computer, Inc.

Kernel 2.6.31 and 2.6.32 (debian packages), firmware 
dvb-usb-dib0700-1.20.fw. Intel Atom 330 (dualcore CPU).

Since dvb_usb_dib0700 is loaded, server has load 1.00+. After module 
unloading it goes down again.

J.

Markus Suvanto wrote:
> Hauppauge Nova-T 500 Dual DVB-T generates
> high cpu load even if there is nothing going on.
> For example:
> 
> #!/bin/bash
> 
> echo "rmmod  dvb_usb_dib0700"
> rmmod  dvb_usb_dib0700
> 
>         for ((i=0; i<10; i++))
>         do
>                 cat /proc/loadavg
>                 sleep 30
>         done
> 
> echo "modprobe  dvb_usb_dib0700"
> modprobe  dvb_usb_dib0700
> 
>         for ((i=0; i<10; i++))
>         do
>                 cat /proc/loadavg
>                 sleep 30
>         done
> 
> 
> rmmod  dvb_usb_dib0700
> 0.51 0.50 0.47 1/289 8253
> 0.51 0.50 0.47 1/289 8261
> 0.31 0.45 0.45 1/289 8269
> 0.18 0.41 0.43 1/289 8277
> 0.11 0.37 0.42 1/289 8285
> 0.07 0.33 0.40 1/289 8295
> 0.04 0.30 0.39 1/289 8303
> 0.26 0.33 0.40 1/288 8312
> 0.16 0.30 0.38 1/289 8321
> 0.09 0.27 0.37 1/289 8330
> modprobe  dvb_usb_dib0700
> 0.13 0.25 0.36 2/291 8355
> 0.16 0.24 0.35 1/289 8370
> 0.64 0.35 0.38 1/289 8378
> 0.78 0.41 0.40 1/289 8386
> 0.58 0.40 0.40 1/289 8394
> 0.35 0.36 0.38 1/289 8404
> 0.21 0.32 0.37 1/289 8412
> 0.52 0.39 0.38 1/289 8433
> 0.84 0.48 0.41 1/289 8441
> 0.75 0.49 0.42 1/289 8450
> 
> Kernel:  2.6.32-rc8  (+
> 	git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6.git
> drm-linus)
> 
> Linux 2.6.32-rc8-00020-g5349ef3 #29 SMP Tue Nov 24 09:52:05 EET 2009
> x86_64 AMD Phenom(tm) II X3 705e Processor AuthenticAMD GNU/Linux
> 
> Gnu C                  4.3.4
> Gnu make               3.81
> binutils               2.18
> util-linux             2.14.2
> mount                  support
> module-init-tools      3.5
> e2fsprogs              1.41.3
> PPP                    2.4.4
> Linux C Library        2.9
> Dynamic linker (ldd)   2.9
> Procps                 3.2.8
> Net-tools              1.60
> Kbd                    1.13
> Sh-utils               7.5
> wireless-tools         29
> Modules Loaded         dvb_usb_dib0700 ipv6 snd_seq_dummy snd_seq_oss
> snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss
> libafs af_packet bridge stp llc tun bitrev kvm_amd kvm option btrfs
> zlib_deflate cryptomgr aead pcompress crypto_blkcipher crc32c
> libcrc32c crypto_hash crypto_algapi mt2060 usbserial mousedev usbhid
> usbmouse dib7000p dib7000m dib0070 dvb_usb dib3000mc dib8000
> dibx000_common dvb_core usb_storage firewire_ohci radeon ohci_hcd
> ehci_hcd uhci_hcd ttm firewire_core drm_kms_helper drm usbcore
> firmware_class crc_itu_t i2c_algo_bit i2c_piix4 ohci1394 ata_generic
> pata_acpi snd_hda_codec_atihdmi ieee1394 processor cfbcopyarea thermal
> snd_hda_codec_via i2c_core atl1e thermal_sys snd_hda_intel nls_base
> snd_hda_codec pata_atiixp rtc_cmos atkbd snd_pcm floppy snd_timer
> rtc_core pcspkr snd rtc_lib sg 8250_pnp cfbimgblt cfbfillrect
> soundcore 8250 asus_atk0110 evdev serial_core psmouse snd_page_alloc
> hwmon serio_raw button unix ext4 jbd2 crc16 dm_mod raid1 md_mod sd_mod
> ahci libata scsi_mod fbcon tileblit crc32 font bitblit softcursor fb
> 
> -Markus