Re: [fluid-dev] ALSA driver consuming too much CPU

[Paul Millar]

Hi Mihail,

On Tuesday 21 November 2006 15:16, Mihail Zenkov wrote:
> > I can set the sample rate to 48kHz in fluid_settings_t.  But, when I
> > start the audio output, it falls back to 41.1kHz.  Setting the ALSA
> > device to "default" still gives 100% CPU usage, but "hw:0" works fine.
>
> Please, do 'cat /proc/asound/cards' and
> 'cat /proc/asound/card0/pcm0p/sub0/hw_params' when you have problem
> (100% cpu) and repeat this when don't have.

I've included results for all four possible combinations ("hw:0" vs "default", 
44.1kHz vs 48kHz) below.

Cheers,

Paul.


ALSA "hw:0" device
==================

44.1kHz sample rate (no problems)
-------------------
 0 [AudioPCI       ]: ENS1371 - Ensoniq AudioPCI
                      Ensoniq AudioPCI ENS1371 at 0xb400, irq 217
 1 [I82801DBICH4   ]: ICH4 - Intel 82801DB-ICH4
                      Intel 82801DB-ICH4 with ALC650D at 0xeb000000, irq 209
access: RW_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 44100 (1445100000/32768)
period_size: 65
buffer_size: 1040
tick_time: 4000

48kHz sample rate ("The sample rate is set to 44100, the synth...")
-----------------
 0 [AudioPCI       ]: ENS1371 - Ensoniq AudioPCI
                      Ensoniq AudioPCI ENS1371 at 0xb400, irq 217
 1 [I82801DBICH4   ]: ICH4 - Intel 82801DB-ICH4
                      Intel 82801DB-ICH4 with ALC650D at 0xeb000000, irq 209
access: RW_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 44100 (1445100000/32768)
period_size: 65
buffer_size: 1040
tick_time: 4000



ALSA "default" device
=====================

44.1kHz sample rate (100% CPU)
-------------------
 0 [AudioPCI       ]: ENS1371 - Ensoniq AudioPCI
                      Ensoniq AudioPCI ENS1371 at 0xb400, irq 217
 1 [I82801DBICH4   ]: ICH4 - Intel 82801DB-ICH4
                      Intel 82801DB-ICH4 with ALC650D at 0xeb000000, irq 209
access: MMAP_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 48000 (1572864000/32768)
period_size: 1024
buffer_size: 16384
tick_time: 4000


48kHz sample rate (100% CPU)
-----------------
 0 [AudioPCI       ]: ENS1371 - Ensoniq AudioPCI
                      Ensoniq AudioPCI ENS1371 at 0xb400, irq 217
 1 [I82801DBICH4   ]: ICH4 - Intel 82801DB-ICH4
                      Intel 82801DB-ICH4 with ALC650D at 0xeb000000, irq 209
access: MMAP_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 48000 (1572864000/32768)
period_size: 1024
buffer_size: 16384
tick_time: 4000

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