7 Nov
2009
7 Nov
'09
2:41 p.m.
Another thing you can check:
dmesg | grep -i hpet
You'll see if your h/w supports it.
You can read more at
http://en.wikipedia.org/wiki/High_Precision_Event_Timer
J.
--- On Sat, 11/7/09, Ralf Mardorf <ralf.mardorf(a)alice-dsl.net> wrote:
From: Ralf Mardorf <ralf.mardorf(a)alice-dsl.net>
Subject: Re: [LAD] timers
To: "James Warden" <warjamy(a)yahoo.com>
Cc: linux-audio-dev(a)lists.linuxaudio.org
Date: Saturday, November 7, 2009, 8:57 AM
Thank you very much James and Ray
:).
Ralf
James Warden wrote:
-- Secret of Tux:
http://images.wallaceandgromit.com/user_uploads/forum_thumbnails/5/75/355.j…
"Gromit bit me" says HMV dog:
http://img.dailymail.co.uk/i/pix/2007/03_03/GomitHMVPA_468x319.jpg
yeah, I have added a few things in a startup
script.
Among other things, I have:
chgrp audio /dev/hpet
echo 1024 > /proc/sys/dev/hpet/max-user-freq
modprobe snd-hrtimer
The modprobe may not be needed anymore as my kernel is
using hr-timer by default.
I wrote this script quite some
time ago and forgot about it :)
J.
--- On Sat, 11/7/09, Ralf Mardorf <ralf.mardorf(a)alice-dsl.net>
wrote:
> From: Ralf Mardorf <ralf.mardorf(a)alice-dsl.net>
> Subject: Re: [LAD] timers
> To: Cc: linux-audio-dev(a)lists.linuxaudio.org
> Date: Saturday, November 7, 2009, 8:52 AM
> James Warden wrote:
>
>> Ralf,
>>
>> It depends how ALSA was compiled in the
kernel. Here
>>
> is my kernel config related to this matter:
>
>> CONFIG_SND=m
>> CONFIG_SND_TIMER=m
>> CONFIG_SND_PCM=m
>> CONFIG_SND_HWDEP=m
>> CONFIG_SND_RAWMIDI=m
>> CONFIG_SND_SEQUENCER=m
>> CONFIG_SND_SEQ_DUMMY=m
>> # CONFIG_SND_MIXER_OSS is not set
>> # CONFIG_SND_PCM_OSS is not set
>> # CONFIG_SND_SEQUENCER_OSS is not set
>> CONFIG_SND_HRTIMER=m
>> CONFIG_SND_SEQ_HRTIMER_DEFAULT=y
>>
>> J.
>>
> There is another question I've got :S.
>
> spinymouse-sudo@64studio:~$ ls -l /dev | grep
hpet
> crw-rw---- 1
root root 10, 228
2009-11-07
13:38 hpet
>
> The group for hpet isn't audio, thus I guess a
user won't
> be able to use it?!
>
> Oops, "# CONFIG_SND_HRTIMER is not set", has this
now
> become something I should post to the 64
Studio
list? It's the default for the
> 64 Studio kernel. It's not a self build
kernel.
>
> spinymouse-sudo@64studio:~$ cat
> /boot/config-2.6.29-1-multimedia-amd64 | grep
CONFIG_SND
CONFIG_SND=m
CONFIG_SND_TIMER=m
CONFIG_SND_PCM=m
CONFIG_SND_HWDEP=m
CONFIG_SND_RAWMIDI=m
CONFIG_SND_JACK=y
CONFIG_SND_SEQUENCER=m
CONFIG_SND_SEQ_DUMMY=m
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=m
CONFIG_SND_PCM_OSS=m
CONFIG_SND_PCM_OSS_PLUGINS=y
CONFIG_SND_SEQUENCER_OSS=y
# CONFIG_SND_HRTIMER is not set
# CONFIG_SND_DYNAMIC_MINORS is not set
CONFIG_SND_SUPPORT_OLD_API=y
CONFIG_SND_VERBOSE_PROCFS=y
# CONFIG_SND_VERBOSE_PRINTK is not set
# CONFIG_SND_DEBUG is not set
CONFIG_SND_VMASTER=y
CONFIG_SND_MPU401_UART=m
CONFIG_SND_OPL3_LIB=m
CONFIG_SND_VX_LIB=m
CONFIG_SND_AC97_CODEC=m
CONFIG_SND_DRIVERS=y
CONFIG_SND_PCSP=m
CONFIG_SND_DUMMY=m
CONFIG_SND_VIRMIDI=m
CONFIG_SND_MTS64=m
CONFIG_SND_SERIAL_U16550=m
CONFIG_SND_MPU401=m
CONFIG_SND_PORTMAN2X4=m
CONFIG_SND_AC97_POWER_SAVE=y
CONFIG_SND_AC97_POWER_SAVE_DEFAULT=0
CONFIG_SND_SB_COMMON=m
CONFIG_SND_SB16_DSP=m
CONFIG_SND_PCI=y
CONFIG_SND_AD1889=m
CONFIG_SND_ALS300=m
CONFIG_SND_ALS4000=m
CONFIG_SND_ALI5451=m
CONFIG_SND_ATIIXP=m
CONFIG_SND_ATIIXP_MODEM=m
CONFIG_SND_AU8810=m
CONFIG_SND_AU8820=m
CONFIG_SND_AU8830=m
# CONFIG_SND_AW2 is not set
CONFIG_SND_AZT3328=m
CONFIG_SND_BT87X=m
# CONFIG_SND_BT87X_OVERCLOCK is not set
CONFIG_SND_CA0106=m
CONFIG_SND_CMIPCI=m
CONFIG_SND_OXYGEN_LIB=m
CONFIG_SND_OXYGEN=m
CONFIG_SND_CS4281=m
CONFIG_SND_CS46XX=m
CONFIG_SND_CS46XX_NEW_DSP=y
CONFIG_SND_CS5530=m
CONFIG_SND_DARLA20=m
CONFIG_SND_GINA20=m
CONFIG_SND_LAYLA20=m
CONFIG_SND_DARLA24=m
CONFIG_SND_GINA24=m
CONFIG_SND_LAYLA24=m
CONFIG_SND_MONA=m
CONFIG_SND_MIA=m
CONFIG_SND_ECHO3G=m
CONFIG_SND_INDIGO=m
CONFIG_SND_INDIGOIO=m
CONFIG_SND_INDIGODJ=m
CONFIG_SND_EMU10K1=m
CONFIG_SND_EMU10K1X=m
CONFIG_SND_ENS1370=m
CONFIG_SND_ENS1371=m
CONFIG_SND_ES1938=m
CONFIG_SND_ES1968=m
CONFIG_SND_FM801=m
CONFIG_SND_FM801_TEA575X_BOOL=y
CONFIG_SND_FM801_TEA575X=m
CONFIG_SND_HDA_INTEL=m
# CONFIG_SND_HDA_HWDEP is not set
CONFIG_SND_HDA_INPUT_BEEP=y
CONFIG_SND_HDA_CODEC_REALTEK=y
CONFIG_SND_HDA_CODEC_ANALOG=y
CONFIG_SND_HDA_CODEC_SIGMATEL=y
CONFIG_SND_HDA_CODEC_VIA=y
CONFIG_SND_HDA_CODEC_ATIHDMI=y
CONFIG_SND_HDA_CODEC_NVHDMI=y
CONFIG_SND_HDA_CODEC_INTELHDMI=y
CONFIG_SND_HDA_ELD=y
CONFIG_SND_HDA_CODEC_CONEXANT=y
CONFIG_SND_HDA_CODEC_CMEDIA=y
CONFIG_SND_HDA_CODEC_SI3054=y
CONFIG_SND_HDA_GENERIC=y
CONFIG_SND_HDA_POWER_SAVE=y
CONFIG_SND_HDA_POWER_SAVE_DEFAULT=0
CONFIG_SND_HDSP=m
CONFIG_SND_HDSPM=m
CONFIG_SND_HIFIER=m
CONFIG_SND_ICE1712=m
CONFIG_SND_ICE1724=m
CONFIG_SND_INTEL8X0=m
CONFIG_SND_INTEL8X0M=m
CONFIG_SND_KORG1212=m
CONFIG_SND_MAESTRO3=m
CONFIG_SND_MIXART=m
CONFIG_SND_NM256=m
CONFIG_SND_PCXHR=m
CONFIG_SND_RIPTIDE=m
CONFIG_SND_RME32=m
CONFIG_SND_RME96=m
CONFIG_SND_RME9652=m
CONFIG_SND_SONICVIBES=m
CONFIG_SND_TRIDENT=m
CONFIG_SND_VIA82XX=m
CONFIG_SND_VIA82XX_MODEM=m
CONFIG_SND_VIRTUOSO=m
CONFIG_SND_VX222=m
CONFIG_SND_YMFPCI=m
CONFIG_SND_SPI=y
CONFIG_SND_USB=y
CONFIG_SND_USB_AUDIO=m
CONFIG_SND_USB_USX2Y=m
CONFIG_SND_USB_CAIAQ=m
CONFIG_SND_USB_CAIAQ_INPUT=y
CONFIG_SND_USB_US122L=m
CONFIG_SND_PCMCIA=y
CONFIG_SND_VXPOCKET=m
CONFIG_SND_PDAUDIOCF=m
# CONFIG_SND_SOC is not set
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