<div dir="ltr"><div><span style="font-size:16px">> </span>Tanu wrote:</div><span style="font-size:16px">> You can check with "pactl list source-outputs" how big the "buffer</span><br style="font-size:16px"><span style="font-size:16px">> latency" of your recording stream is. If it's small, then I don't think</span><br style="font-size:16px"><span style="font-size:16px">> the problem is in your application.</span><br><div><span style="font-size:16px"><br></span></div><div><span style="font-size:16px">Hi, thank you for your answer. Buffer latency and source latency have a value of 0 usec:</span></div><div><span style="font-size:16px"><br></span></div><div><div><span style="font-size:16px">Source Output #2</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Driver: protocol-native.c</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Owner Module: 12</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Client: 12</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Source: 2</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Sample Specification: float32le 2ch 44100Hz</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Channel Map: front-left,front-right</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Format: pcm, format.sample_format = "\"float32le\"" format.rate = "44100" format.channels = "2" format.channel_map = "\"front-left,front-right\""</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Corked: no</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Mute: no</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Volume: front-left: 65536 / 100% / 0,00 dB, front-right: 65536 / 100% / 0,00 dB</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span> balance 0,00</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Buffer Latency: 0 usec</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Source Latency: 0 usec</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Resample method: n/a</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>Properties:</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span><a href="http://media.name">media.name</a> = "Record Stream"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span><a href="http://application.name">application.name</a> = "PulseEffects"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>native-protocol.peer = "UNIX socket client"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>native-protocol.version = "32"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>media.role = "production"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>application.icon_name = "pulseeffects"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span><a href="http://application.process.id">application.process.id</a> = "1797"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>application.process.user = "wallace"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>application.process.host = "wwmm"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>application.process.binary = "python3.6"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>application.language = "en_US.UTF-8"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>window.x11.display = ":1"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>application.process.machine_id = "767c0755fd35486daf42d8e1a6d41540"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span>application.process.session_id = "c3"</span></div><div><span style="font-size:16px"><span style="white-space:pre"> </span><a href="http://module-stream-restore.id">module-stream-restore.id</a> = "source-output-by-media-role:production"</span></div></div><div><span style="font-size:16px"><br></span></div><div><span style="font-size:16px">I wonder if this problem could be related to the alsa driver. This </span>ALC887-VD sound card is in a ryzen motherboard (asus prime B350m-a). As this is a new hardware maybe something is not right at the driver level. I am using kernel 4.11.6 and Pulseaudio 10 in Arch Linux. I have been suffering with random cracklings that come and go after shutdown/poweron also at random (tsched=0 does not help). When they happen I can listen to them even if using speaker-test to play a sine wave directly to an alsa device. So it does not seems that Pulseaudio is the one responsible for this crackling. But I do not know how to pinpoint the exact cause of this problem.</div><div><span style="font-size:16px"><br></span></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jun 27, 2017 at 11:12 AM, Tanu Kaskinen <span dir="ltr"><<a href="mailto:tanuk@iki.fi" target="_blank">tanuk@iki.fi</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On Sun, 2017-06-25 at 16:14 -0300, wellington wallace wrote:<br> > Hi,<br> ><br> > Today I noticed I have lots of these messages in Pulseaudio debug output:<br> ><br> > jun 25 15:44:11 wwmm pulseaudio[1148]: D: [alsa-sink-ALC887-VD Analog]<br> > ratelimit.c: 1685 events suppressed<br> > jun 25 15:44:11 wwmm pulseaudio[1148]: D: [alsa-sink-ALC887-VD Analog]<br> > memblock.c: Pool full<br> > jun 25 15:44:11 wwmm pulseaudio[1148]: D: [null-sink] memblock.c: Pool full<br> ><br> > They happen when I am using my application<br> > <a href="https://github.com/wwmm/pulseeffects" rel="noreferrer" target="_blank">https://github.com/wwmm/<wbr>pulseeffects</a>. In PulseEffects I load a null sink<br> > and then launch a gstreamer pipeline where the pulsesrc plugin records from<br> > the null sink monitor device. I wonder if I am doing something wrong. It<br> > seems to me that these messages should not be there when everything is<br> > alright. Is that so?<br> <br> </span>If the mempool is full, then all memblocks from the pool are in use,<br> and pulseaudio has to use malloc() to allocate new blocks. Either the<br> pool is just too small for the use case, or something is leaking (i.e.<br> not releasing) memblocks.<br> <br> Applications don't interface with the mempool directly, but if a<br> recording application doesn't consume the audio that the server sends,<br> then memblocks will be queued in the stream buffer (usually up to 4MB).<br> This could cause shortage in the mempool, especially if the configured<br> latency is low, because in that case the blocks are reserved at a<br> higher rate. I don't know how else this could be the application's<br> fault.<br> <br> You can check with "pactl list source-outputs" how big the "buffer<br> latency" of your recording stream is. If it's small, then I don't think<br> the problem is in your application.<br> <span class=""><br> > As someone new to the development of Pulseaudio applications I would also<br> > like to ask what is the proper when to finish an application that is using<br> > Pulseaudio. The documentation tells to disconnect from the context and I am<br> > already doing that. Is there something else I should do when closing the<br> > application? Like calling unref on context?<br> <br> </span>Yes, you need to call unref on all objects that your application is<br> holding a reference to, and that includes the context object.<br> <span class="HOEnZb"><font color="#888888"><br> --<br> Tanu<br> <br> <a href="https://www.patreon.com/tanuk" rel="noreferrer" target="_blank">https://www.patreon.com/tanuk</a><br> </font></span></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Prof.° Wellington Wallace Miguel Melo<br><br><div>CEFET/RJ Uned Nova Iguaçu<br><br></div></div></div> </div>