[alsa-devel] snd_pcm_writei VS snd_pcm_mmap_writei
perex at perex.cz
Fri Nov 19 08:09:29 CET 2010
On Fri, 19 Nov 2010, Irfan Shaikh wrote:
> Please tell me
> a) Difference between working of snd_pcm_mmap_writei and snd_pcm_writei ?
> b) Performance wise which is better ?
The mmap functions does not require user space / kernel context switches.
> When i use gettimeofday almost profile time comes almost same for both of them.
With current hw power, there are no major differences.
Jaroslav Kysela <perex at perex.cz>
Linux Kernel Sound Maintainer
ALSA Project, Red Hat, Inc.
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