Hi pulseaudio-discuss, I'm running pulseaudio 0.9.22-24-g67d18 on Ubuntu 11.04, with a source at "s16le 2ch 44100Hz" and a USB card that is configured the same way. I see CPU usage at 25% - I would have thought that if the source/sink sample rates are identical and there is nothing else going on in the system, that pulseaudio would have no sample conversion work to do. Is there a setting to get more info on what it's doing? I've tried 'pulseaudio -vv' and I see: D: alsa-util.c: snd_pcm_dump(): D: alsa-util.c: Hardware PCM card 1 'USB Audio CODEC ' device 0 subdevice 0 D: alsa-util.c: Its setup is: D: alsa-util.c: stream : CAPTURE D: alsa-util.c: access : MMAP_INTERLEAVED D: alsa-util.c: format : S16_LE D: alsa-util.c: subformat : STD D: alsa-util.c: channels : 2 D: alsa-util.c: rate : 44100 D: alsa-util.c: exact rate : 44100 (44100/1) D: alsa-util.c: msbits : 16 D: alsa-util.c: buffer_size : 88200 D: alsa-util.c: period_size : 44100 D: alsa-util.c: period_time : 1000000 D: alsa-util.c: tstamp_mode : ENABLE D: alsa-util.c: period_step : 1 D: alsa-util.c: avail_min : 87319 D: alsa-util.c: period_event : 0 D: alsa-util.c: start_threshold : -1 D: alsa-util.c: stop_threshold : 1445068800 D: alsa-util.c: silence_threshold: 0 D: alsa-util.c: silence_size : 0 D: alsa-util.c: boundary : 1445068800 D: alsa-util.c: appl_ptr : 0 D: alsa-util.c: hw_ptr : 0 and later on, when I play a stream: I: sink-input.c: Created input 0 "ALSA Playback" on alsa_output.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-default.analog-stereo with sample spec s16le 2ch 44100Hz and channel map front-left,front-right I: sink-input.c: media.name = "ALSA Playback" I: sink-input.c: application.name = "ALSA plug-in [chrome]" I: sink-input.c: native-protocol.peer = "TCP/IP client from 192.168.0.200:46969" I: sink-input.c: native-protocol.version = "16" I: sink-input.c: application.process.id = "3722" ... I: sink-input.c: application.process.binary = "chrome" I: sink-input.c: window.x11.display = ":0.0" I: sink-input.c: application.language = "en_US.UTF-8" I: sink-input.c: application.process.machine_id = "fa43ac05f22ed9742e52c9fc48d16edd" I: sink-input.c: application.process.session_id = "fa43ac05f22ed9742e52c9fc48d16edd-1310830453.452376-1268823141" I: sink-input.c: module-stream-restore.id = "sink-input-by-application-name:ALSA plug-in [chrome]" I: protocol-native.c: Requested tlength=500.00 ms, minreq=20.00 ms D: protocol-native.c: Early requests mode enabled, configuring sink latency to minreq. D: alsa-sink.c: Cutting sleep time for the initial iterations by half. D: alsa-sink.c: Cutting sleep time for the initial iterations by half. D: memblockq.c: memblockq requested: maxlength=4194304, tlength=88200, base=4, prebuf=84672, minreq=3528 maxrewind=0 D: memblockq.c: memblockq sanitized: maxlength=4194304, tlength=88200, base=4, prebuf=84672, minreq=3528 maxrewind=0 I: protocol-native.c: Final latency 520.00 ms = 460.00 ms + 2*20.00 ms + 20.00 ms ..... It seems like they match up exactly, or am I missing something? Thanks, Josh -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20110716/52fb4b01/attachment.htm>
