15.07.2014 22:28, I wrote: > 13.07.2014 18:12, Tanu Kaskinen wrote: >> Someone (not me, at least any time soon) could write a simple >> patch that measures and logs (at error level - measurements shouldn't be >> done at debug log level) the time that the probing takes. Then test it >> on your development machine, and if the time seems negligible, try also >> e.g. plugging in a USB sound card to a Raspberry Pi. > > Done. See the attachment. The old desktop (0 = onboard analog audio, 1 = snd-pcsp, 2 = TV/radio tuner based on SAA7134): E: [pulseaudio] alsa-mixer.c: Checking for profile input:analog-mono took 5805 usec E: [pulseaudio] alsa-mixer.c: Checking for profile input:analog-stereo took 4411 usec E: [pulseaudio] alsa-mixer.c: Checking for profile input:iec958-stereo took 490 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-mono took 1303 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-stereo took 776 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-stereo+input:analog-stereo took 521 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-21 took 625 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-40 took 2559 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-41 took 2099 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-50 took 2040 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-51 took 2574 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-71 took 2540 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-stereo took 440 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-ac3-surround-40 took 24 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-ac3-surround-51 took 21 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-dts-surround-51 took 20 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-stereo took 419 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-surround took 404 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-stereo-extra1 took 384 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-surround-extra1 took 393 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-stereo-extra2 took 380 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-surround-extra2 took 431 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-stereo-extra3 took 377 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-surround-extra3 took 389 usec E: [pulseaudio] alsa-mixer.c: Checking for all profiles on device 0 took 43775 usec in total E: [pulseaudio] alsa-mixer.c: Checking for profile input:analog-mono took 415 usec E: [pulseaudio] alsa-mixer.c: Checking for profile input:analog-stereo took 587 usec E: [pulseaudio] alsa-mixer.c: Checking for profile input:iec958-stereo took 270 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-mono took 179 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-stereo took 420 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-21 took 240 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-40 took 236 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-41 took 254 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-50 took 243 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-51 took 235 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-71 took 235 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-stereo took 260 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-ac3-surround-40 took 24 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-ac3-surround-51 took 21 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-dts-surround-51 took 22 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-stereo took 260 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-surround took 271 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-stereo-extra1 took 233 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-surround-extra1 took 233 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-stereo-extra2 took 234 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-surround-extra2 took 233 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-stereo-extra3 took 232 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-surround-extra3 took 233 usec E: [pulseaudio] alsa-mixer.c: Checking for all profiles on device 2 took 12530 usec in total E: [pulseaudio] alsa-mixer.c: Checking for profile input:analog-mono took 293 usec E: [pulseaudio] alsa-mixer.c: Checking for profile input:analog-stereo took 545 usec E: [pulseaudio] alsa-mixer.c: Checking for profile input:analog-4-channel-input took 211 usec E: [pulseaudio] alsa-mixer.c: Checking for profile input:iec958-stereo took 265 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-mono took 290 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-stereo took 4092 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-21 took 255 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-40 took 279 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-41 took 251 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-50 took 253 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-51 took 264 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-surround-71 took 242 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-stereo took 265 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-ac3-surround-40 took 24 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-ac3-surround-51 took 23 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-dts-surround-51 took 22 usec E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-stereo took 302 usec E: [pulseaudio] alsa-mixer.c: Checking for all profiles on device 1 took 11445 usec in total -- Alexander E. Patrakov
