Date: Tue, 16 Jul 2002 09:19:20 -0700 From: Orion Hodson <orion@freebsd.org> To: "Jose M. Alcaide" <jose@we.lc.ehu.es> Cc: FreeBSD-multimedia@freebsd.org Subject: Re: interrupts from pcm(4) while no sound is being played Message-ID: <200207161619.g6GGJKb30653@puma.icir.org> In-Reply-To: Your message of "Tue, 16 Jul 2002 12:22:58 %2B0200." <20020716102258.GC259@v-ger.we.lc.ehu.es>
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/-- "Jose M. Alcaide" wrote: | On Mon, Jul 15, 2002 at 09:52:37AM -0700, Orion Hodson wrote: | | My only concern is the possible impact of a high interrupt rate (~705 per | second after playing a 44KHz, 16 bit sound) on the system performance. | For example, that adds a CPU load of ~1.5% in my laptop (Celeron 433) | while esd is holding the audio device open (I configured esd for using | -and never freeing- /dev/dsp0.1). In the case of esd, if you want to fix this, have it do an AIOSTOP ioctl shortly after it stops writing audio data and a SNDCTL_DSP_SETTRIGGER when it's ready to write data again. This corresponds to pausing and unpausing the device by halting and restarting interrupts. - Orion To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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