<html>
  <head>
    <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    <div class="moz-cite-prefix">On 27.06.2017 16:47, wellington wallace
      wrote:<br>
    </div>
    <blockquote
cite="mid:CAAJnyhffAXGjfba+Lre-CDx1KY3Ff6GA_NwNi4PQxQEZZqXO-w@mail.gmail.com"
      type="cite">
      <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
                moz-do-not-send="true" href="http://media.name">media.name</a>
              = "Record Stream"</span></div>
          <div><span style="font-size:16px"><span style="white-space:pre">                </span><a
                moz-do-not-send="true" 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
                moz-do-not-send="true"
                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
                moz-do-not-send="true"
                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 moz-do-not-send="true"
              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 moz-do-not-send="true"
                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="HOEnZb"><font color="#888888"><br>
                --<br>
                Tanu<br>
                <br>
                <a moz-do-not-send="true"
                  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>
    </blockquote>
    For what it's worth I 'm seeing the same messages when I run
    module-loopback at low latencies.<br>
    It does not seem to affect the audio though.<br>
  </body>
</html>