<div dir="ltr"><div>Hi,</div><div> </div><div>Below the result of the command "pacmd list".</div><div>Here without any change of resampling method.</div><div> </div><div>Thanks</div><div> </div><div>Memory blocks currently allocated: 10, size: 102.5 KiB. Memory blocks allocated during the whole lifetime: 105406, size: 15.0 MiB. Memory blocks imported from other processes: 5, size: 8.6 KiB. Memory blocks exported to other processes: 2, size: 188 B. Total sample cache size: 0 B. Default sample spec: s16le 2ch 44100Hz Default channel map: front-left,front-right Default sink name: VAC Default source name: VACmic Memory blocks of type POOL: 5 allocated/101237 accumulated. Memory blocks of type POOL_EXTERNAL: 0 allocated/0 accumulated. Memory blocks of type APPENDED: 0 allocated/0 accumulated. Memory blocks of type USER: 0 allocated/0 accumulated. Memory blocks of type FIXED: 0 allocated/0 accumulated. Memory blocks of type IMPORTED: 5 allocated/4169 accumulated. 21 module(s) loaded. index: 0 name: <module-device-restore> argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Automatically restore the volume/mute state of devices" module.version = "12.2" index: 1 name: <module-stream-restore> argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Automatically restore the volume/mute/device state of streams" module.version = "12.2" index: 2 name: <module-card-restore> argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Automatically restore profile of cards" module.version = "12.2" index: 3 name: <module-augment-properties> argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Augment the property sets of streams with additional static information" module.version = "12.2" index: 4 name: <module-switch-on-port-available> argument: <> used: -1 load once: yes properties: module.author = "David Henningsson" module.description = "Switches ports and profiles when devices are plugged/unplugged" module.version = "12.2" index: 5 name: <module-udev-detect> argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Detect available audio hardware and load matching drivers" module.version = "12.2" index: 6 name: <module-native-protocol-unix> argument: <> used: -1 load once: no properties: module.author = "Lennart Poettering" module.description = "Native protocol (UNIX sockets)" module.version = "12.2" index: 7 name: <module-default-device-restore> argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Automatically restore the default sink and source" module.version = "12.2" index: 8 name: <module-rescue-streams> argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "When a sink/source is removed, try to move its streams to the default sink/source" module.version = "12.2" index: 9 name: <module-always-sink> argument: <> used: -1 load once: yes properties: module.author = "Colin Guthrie" module.description = "Always keeps at least one sink loaded even if it's a null one" module.version = "12.2" index: 11 name: <module-intended-roles> argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Automatically set device of streams based on intended roles of devices" module.version = "12.2" index: 12 name: <module-suspend-on-idle> argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "When a sink/source is idle for too long, suspend it" module.version = "12.2" index: 13 name: <module-console-kit> argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Create a client for each ConsoleKit session of this user" module.version = "12.2" index: 14 name: <module-systemd-login> argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Create a client for each login session of this user" module.version = "12.2" index: 15 name: <module-position-event-sounds> argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Position event sounds between L and R depending on the position on screen of the widget triggering them." module.version = "12.2" index: 16 name: <module-role-cork> argument: <> used: -1 load once: yes properties: module.author = "Lennart Poettering" module.description = "Mute & cork streams with certain roles while others exist" module.version = "12.2" index: 17 name: <module-filter-heuristics> argument: <> used: -1 load once: yes properties: module.author = "Colin Guthrie" module.description = "Detect when various filters are desirable" module.version = "12.2" index: 18 name: <module-filter-apply> argument: <> used: -1 load once: yes properties: module.author = "Colin Guthrie" module.description = "Load filter sinks automatically when needed" module.version = "12.2" index: 19 name: <module-null-sink> argument: <sink_name=VAC sink_properties=device.description=VAC> used: 2 load once: no properties: module.author = "Lennart Poettering" module.description = "Clocked NULL sink" module.version = "12.2" index: 20 name: <module-remap-source> argument: <master=VAC.monitor source_name=VACmic source_properties=device.description=VAC> used: 1 load once: no properties: module.author = "Stefan Huber" module.description = "Virtual channel remapping source" module.version = "12.2" index: 21 name: <module-cli-protocol-unix> argument: <> used: -1 load once: no properties: module.author = "Lennart Poettering" module.description = "Command line interface protocol (UNIX sockets)" module.version = "12.2" 1 sink(s) available. * index: 1 name: <VAC> driver: <module-null-sink.c> flags: DECIBEL_VOLUME LATENCY FLAT_VOLUME DYNAMIC_LATENCY state: RUNNING suspend cause: (none) priority: 1000 volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 base volume: 65536 / 100% / 0.00 dB volume steps: 65537 muted: no current latency: 0.41 ms max request: 0 KiB max rewind: 0 KiB monitor source: 1 sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo used by: 1 linked by: 2 configured latency: 0.50 ms; range is 0.50 .. 2000.00 ms module: 19 properties: device.description = "VAC" device.class = "abstract" device.icon_name = "audio-card" 2 source(s) available. index: 1 name: <VAC.monitor> driver: <module-null-sink.c> flags: DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY state: RUNNING suspend cause: (none) priority: 1000 volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 base volume: 65536 / 100% / 0.00 dB volume steps: 65537 muted: no current latency: 0.00 ms max rewind: 0 KiB sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo used by: 1 linked by: 1 configured latency: 2000.00 ms; range is 0.50 .. 2000.00 ms monitor_of: 1 module: 19 properties: device.description = "Monitor of VAC" device.class = "monitor" device.icon_name = "audio-input-microphone" * index: 2 name: <VACmic> driver: <module-remap-source.c> flags: DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY state: RUNNING suspend cause: (none) priority: 1000 volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 base volume: 65536 / 100% / 0.00 dB volume steps: 65537 muted: no current latency: 0.00 ms max rewind: 0 KiB sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo used by: 1 linked by: 1 configured latency: 2000.00 ms; range is 0.50 .. 2000.00 ms module: 20 properties: device.master_device = "VAC.monitor" device.class = "filter" device.description = "VAC" device.icon_name = "audio-input-microphone" 9 client(s) logged in. index: 0 driver: <module-systemd-login.c> owner module: 14 properties: <a href="http://application.name">application.name</a> = "Login Session 9" systemd-login.session = "9" index: 1 driver: <module-systemd-login.c> owner module: 14 properties: <a href="http://application.name">application.name</a> = "Login Session 11" systemd-login.session = "11" index: 2 driver: <protocol-native.c> owner module: 6 properties: <a href="http://application.name">application.name</a> = "The Sound Player" native-protocol.peer = "UNIX socket client" native-protocol.version = "32" <a href="http://application.process.id">application.process.id</a> = "15814" application.process.user = "vagrant" application.process.host = "debian10.localdomain" application.process.binary = "TheRecorder" application.language = "en_US.utf8" window.x11.display = ":0" application.process.machine_id = "c79df160d01f4c7780e6da0aaf5515c3" application.process.session_id = "9" index: 5 driver: <protocol-native.c> owner module: 6 properties: <a href="http://application.name">application.name</a> = "The Sound Player" native-protocol.peer = "UNIX socket client" native-protocol.version = "32" <a href="http://application.process.id">application.process.id</a> = "15877" application.process.user = "vagrant" application.process.host = "debian10.localdomain" application.process.binary = "W3DClient" application.language = "en_US.utf8" window.x11.display = ":0" application.process.machine_id = "c79df160d01f4c7780e6da0aaf5515c3" application.process.session_id = "9" index: 6 driver: <protocol-native.c> owner module: 6 properties: <a href="http://application.name">application.name</a> = "VLC media player (LibVLC 3.0.12)" native-protocol.peer = "UNIX socket client" native-protocol.version = "32" <a href="http://application.id">application.id</a> = "org.VideoLAN.VLC" application.version = "3.0.12" application.icon_name = "vlc" application.language = "en_US.utf8" <a href="http://application.process.id">application.process.id</a> = "15877" application.process.user = "vagrant" application.process.host = "debian10.localdomain" application.process.binary = "W3DClient" window.x11.display = ":0" application.process.machine_id = "c79df160d01f4c7780e6da0aaf5515c3" application.process.session_id = "9" index: 7 driver: <protocol-native.c> owner module: 6 properties: <a href="http://application.name">application.name</a> = "VLC media player (LibVLC 3.0.12)" native-protocol.peer = "UNIX socket client" native-protocol.version = "32" <a href="http://application.id">application.id</a> = "org.VideoLAN.VLC" application.version = "3.0.12" application.icon_name = "vlc" application.language = "en_US.utf8" <a href="http://application.process.id">application.process.id</a> = "15877" application.process.user = "vagrant" application.process.host = "debian10.localdomain" application.process.binary = "W3DClient" window.x11.display = ":0" application.process.machine_id = "c79df160d01f4c7780e6da0aaf5515c3" application.process.session_id = "9" index: 8 driver: <protocol-native.c> owner module: 6 properties: <a href="http://application.name">application.name</a> = "VLC media player (LibVLC 3.0.12)" native-protocol.peer = "UNIX socket client" native-protocol.version = "32" <a href="http://application.id">application.id</a> = "org.VideoLAN.VLC" application.version = "3.0.12" application.icon_name = "vlc" application.language = "en_US.utf8" <a href="http://application.process.id">application.process.id</a> = "15877" application.process.user = "vagrant" application.process.host = "debian10.localdomain" application.process.binary = "TheSoundPlayer" window.x11.display = ":0" application.process.machine_id = "c79df160d01f4c7780e6da0aaf5515c3" application.process.session_id = "9" index: 9 driver: <protocol-native.c> owner module: 6 properties: <a href="http://application.name">application.name</a> = "Lavf58.20.100" native-protocol.peer = "UNIX socket client" native-protocol.version = "32" <a href="http://application.process.id">application.process.id</a> = "15985" application.process.user = "vagrant" application.process.host = "debian10.localdomain" application.process.binary = "ffmpeg" application.language = "C" window.x11.display = ":0" application.process.machine_id = "c79df160d01f4c7780e6da0aaf5515c3" application.process.session_id = "9" index: 10 driver: <cli.c> owner module: 21 properties: <a href="http://application.name">application.name</a> = "UNIX socket client" 0 card(s) available. 1 sink input(s) available. index: 1 driver: <protocol-native.c> flags: state: RUNNING sink: 1 <VAC> volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 muted: no current latency: 47.01 ms requested latency: 0.50 ms sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo resample method: (null) module: 6 client: 5 <The Sound Player> properties: <a href="http://media.name">media.name</a> = "playStream" <a href="http://application.name">application.name</a> = "The Sound Player" native-protocol.peer = "UNIX socket client" native-protocol.version = "32" <a href="http://application.process.id">application.process.id</a> = "15877" application.process.user = "vagrant" application.process.host = "debian10.localdomain" application.process.binary = "W3DClient" application.language = "en_US.utf8" window.x11.display = ":0" application.process.machine_id = "c79df160d01f4c7780e6da0aaf5515c3" application.process.session_id = "9" <a href="http://module-stream-restore.id">module-stream-restore.id</a> = "sink-input-by-application-name:The Sound Player" 2 source output(s) available. index: 0 driver: <module-remap-source.c> flags: START_CORKED state: RUNNING source: 1 <VAC.monitor> volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 muted: no current latency: 0.00 ms requested latency: 2000.00 ms sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo resample method: (null) owner module: 20 properties: <a href="http://media.name">media.name</a> = "Remapped Stream" media.role = "filter" <a href="http://module-stream-restore.id">module-stream-restore.id</a> = "source-output-by-media-role:filter" index: 1 driver: <protocol-native.c> flags: state: RUNNING source: 2 <VACmic> volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 muted: no current latency: 0.50 ms requested latency: 2000.00 ms sample spec: s16le 2ch 48000Hz channel map: front-left,front-right Stereo resample method: speex-float-1 owner module: 6 client: 9 <Lavf58.20.100> properties: <a href="http://media.name">media.name</a> = "record" <a href="http://application.name">application.name</a> = "Lavf58.20.100" native-protocol.peer = "UNIX socket client" native-protocol.version = "32" <a href="http://application.process.id">application.process.id</a> = "15985" application.process.user = "vagrant" application.process.host = "debian10.localdomain" application.process.binary = "ffmpeg" application.language = "C" window.x11.display = ":0" application.process.machine_id = "c79df160d01f4c7780e6da0aaf5515c3" application.process.session_id = "9" <a href="http://module-stream-restore.id">module-stream-restore.id</a> = "source-output-by-application-name:Lavf58.20.100" 0 cache entrie(s) available.</div><div> </div></div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le mar. 2 févr. 2021 à 02:31, Sean Greenslade <<a href="mailto:sean@seangreenslade.com">sean@seangreenslade.com</a>> a écrit : </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Sat, Jan 30, 2021 at 12:29:46PM +0100, Renaud GHIA wrote: > Hi, > > I use pulseaudio in a use case where the cpu usage is very high (30%) and > IHMO this is not normal. > I tried all the tricks to decrease the cpu load without success > (resampling-method etc...). The cpu remains high. > > My use case is simple. I redirect the sound output of an application to the > sound input of another application (in this case ffmpeg). I load two > modules to create my virtual audio cable like this: > > pactl load-module module-null-sink sink_name=VAC_spk > sink_properties=device.description=VAC > > pactl load-module module-remap-source master=VAC_spk.monitor > source_name=VAC1_mic source_properties=device.description=VAC > > Everything works perfectly, except the cpu which is 30% for this simple use > case. > My cpu is a AMD threadripper and i'am with the latest stable release > pulseaudio 14.2 freshly compiled, > Do you know how to lower the CPU usage? Have you made sure that everything in the chain is operating at the same sample rate? That could be a cause of high CPU usage. Also, I've seen high CPU usage on my setups when I have a large number of pulse clients running and I open pavucontrol, since pavucontrol creates a source output for every client in order to display its VU meters. If neither of those are the cause, can you share the output of the command "pacmd list" when you're seeing high CPU usage? That might shed additional light on what's happening in your setup. --Sean _______________________________________________ pulseaudio-discuss mailing list <a href="mailto:pulseaudio-discuss@lists.freedesktop.org" target="_blank">pulseaudio-discuss@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss</a> </blockquote></div>