Hi Bin, 'Twas brillig, and Bin Gao at 15/03/10 10:28 did gyre and gimble: > (resend as plain text) Nice :) > It seems both pulseaudio alsa PCM plugin (source) and gstreamer > pulsesrc consume much more CPU resource than alsa when working on the > same sample (rate, channel and format). I had a rough look at the source > code and found they both use the threaded mainloop model. Can we have > any chance to optimize for this? > $ gst-launch alsasrc device="hw:0,0" ! queue ! audioconvert ! wavenc ! > filesink location=test.wav CPU% = 2~3% Trying here I get between 1 and 2% CPU. > $ gst-launch pulsesrc ! queue ! audioconvert ! wavenc ! filesink > location=test.wav CPU% = 12~14% Here I get about 4% CPU (one process hovered between 1 and 2%, with a second process hovering between 0 and 1% with a third most at 0 and very occasionally at 1% and a fourth always at 0%) So definitely less than optimal but not as striking as your example. (what was interesting to me was that running the first example via pasuspender caused the sinks/source to not unsuspend themselfs when I hit control + C... need to investigate that one). Col -- Colin Guthrie gmane(at)colin.guthr.ie http://colin.guthr.ie/ Day Job: Tribalogic Limited [http://www.tribalogic.net/] Open Source: Mandriva Linux Contributor [http://www.mandriva.com/] PulseAudio Hacker [http://www.pulseaudio.org/] Trac Hacker [http://trac.edgewall.org/]
