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From: Guilherme Longo <grlongo.ireland@gmail.com>
To: alsa-devel@alsa-project.org
Subject: performance between access mothods!
Date: Sun, 05 Jul 2009 09:03:23 -0300	[thread overview]
Message-ID: <4A50968B.6030201@gmail.com> (raw)
In-Reply-To: <20090705114122.GA5334@sirena.org.uk>

Hi all!

I came across a doubt regarding the the access mode between application 
and PCM device.
It is a hardware parameter related property and there are 5 different 
types available:

SND_PCM_ACCESS_MMAP_INTERLEAVED
SND_PCM_ACCESS_MMAP_NONINTERLEAVED
SND_PCM_ACCESS_MMAP_COMPLEX
SND_PCM_ACCESS_RW_INTERLEAVED
SND_PCM_ACCESS_RW_NONINTERLEAVED

taking in account that these first 3 parameters has direct communication 
with the memory, that means a higher speed operation? And the fact of 
the interleaved has all the samples mixed together , makes any 
difference in performance in comparison to the noninterleaved that has 
samples stored on different buffers?

Thanks in advanced

  reply	other threads:[~2009-07-05 12:03 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-07-05  2:29 davinci-i2c,pcm updates Troy Kisky
2009-07-05  2:29 ` [PATCH V1 01/11] ASoC: DaVinci: i2s, remove MOD_REG_BIT macro Troy Kisky
2009-07-05  2:29   ` [PATCH V1 02/11] ASoC: DaVinci: i2s toggle clock to complete reset Troy Kisky
2009-07-05  2:29     ` [PATCH V1 03/11] ASoc: DaVinci: i2s, minor cleanup Troy Kisky
2009-07-05  2:29       ` [PATCH V1 04/11] ASoC: DaVinci: i2s cleanup Troy Kisky
2009-07-05  2:29         ` [PATCH V1 05/11] ASoC: DaVinci: i2s, only start sample generator if needed Troy Kisky
2009-07-05  2:29           ` [PATCH V1 06/11] ASoC: DaVinci: i2s, minor cleanup of davinci_i2s_startup Troy Kisky
2009-07-05  2:29             ` [PATCH V1 07/11] ASoC: DaVinci: i2s, fix mcbsp_word_length update Troy Kisky
2009-07-05  2:29               ` [PATCH V1 08/11] ASoc: DaVinci: i2s, Improve underrun, support mono Troy Kisky
2009-07-05  2:29                 ` [PATCH V1 09/11] ASoC: DaVinci: i2s, add davinci_i2s_prepare and shutdown Troy Kisky
     [not found]                   ` <1246761001-21982-10-git-send-email-troy.kisky-Q5RJGjKts06CY9SHAMCTRUEOCMrvLtNR@public.gmane.org>
2009-07-05  2:30                     ` [PATCH V1 10/11] ASoC: DaVinci: i2s don't limit rates Troy Kisky
2009-07-05  2:30                       ` [PATCH V1 11/11] ASoC: DaVinci: pcm, fix underruns by using sram Troy Kisky
2009-07-05 13:03                         ` Mark Brown
2009-07-07  1:10                           ` Troy Kisky
2009-07-07  9:31                             ` Mark Brown
2009-07-07 19:07                               ` Troy Kisky
2009-07-07 19:14                                 ` Troy Kisky
2009-07-07 19:21                                   ` Troy Kisky
2009-07-05 11:57                       ` [PATCH V1 10/11] ASoC: DaVinci: i2s don't limit rates Mark Brown
2009-07-06 22:01                         ` Troy Kisky
2009-07-06 22:19                           ` Mark Brown
2009-07-06 22:27                             ` Troy Kisky
2009-07-05 12:17                   ` [PATCH V1 09/11] ASoC: DaVinci: i2s, add davinci_i2s_prepare and shutdown Mark Brown
2010-09-24 16:48                   ` Ambrose, Martin
2010-09-24 19:14                     ` Troy Kisky
2010-09-24 19:43                       ` Ambrose, Martin
2010-09-24 23:13                         ` Troy Kisky
2010-09-27  0:56                         ` Mark Brown
2010-09-27 18:50                           ` Troy Kisky
2010-09-27 20:35                             ` Mark Brown
2010-09-27  0:27                       ` Mark Brown
2009-07-05 12:12                 ` [PATCH V1 08/11] ASoc: DaVinci: i2s, Improve underrun, support mono Mark Brown
     [not found]                 ` <1246761001-21982-9-git-send-email-troy.kisky-Q5RJGjKts06CY9SHAMCTRUEOCMrvLtNR@public.gmane.org>
2009-07-06 11:09                   ` Steve Chen
2009-07-06 11:54                     ` Mark Brown
     [not found]                       ` <20090706115442.GA8925-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2009-07-06 12:45                         ` Steve Chen
2009-07-06 13:26                       ` snd_pcm_format_set_silence parameter Guilherme Longo
2009-07-06 13:52                         ` Clemens Ladisch
2009-07-05 11:41 ` davinci-i2c,pcm updates Mark Brown
2009-07-05 12:03   ` Guilherme Longo [this message]
2009-07-07 11:26     ` performance between access mothods! Takashi Iwai
2009-07-06 21:30   ` davinci-i2c,pcm updates Troy Kisky
2009-07-06 21:41     ` Mark Brown
2009-07-06 22:51       ` Kevin Hilman
2009-07-07  9:20         ` Mark Brown
2009-07-06 21:47   ` Kevin Hilman

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