On Fri, 09 Jun 2017 14:46:47 +0200, Takashi Sakamoto wrote: > > Hi, > > This patchset is a revised version of my former RFC. > > [PATCH RFC 00/21] ALSA: pcm: add tracepoints for PCM params operation > http://mailman.alsa-project.org/pipermail/alsa-devel/2017-May/120548.html > > Unlike SNDRV_PCM_IOCTL_HW_REFINE, returned data from invocation of > ioctl(2) with SNDRV_PCM_IOCTL_HW_PARAMS includes single value for below > parameters: > > * SNDRV_PCM_HW_PARAM_ACCESS > * SNDRV_PCM_HW_PARAM_FORMAT > * SNDRV_PCM_HW_PARAM_SUBFORMAT > * SNDRV_PCM_HW_PARAM_CHANNELS > * SNDRV_PCM_HW_PARAM_RATE > * SNDRV_PCM_HW_PARAM_PERIOD_TIME > * SNDRV_PCM_HW_PARAM_BUFFER_SIZE > * SNDRV_PCM_HW_PARAM_TICK_TIME > > This is an additional selection process of hardware parameters in service > routine of the command. > > This patchset adds tracepoint events to probe the selection process so > that developers can realize final set of parameters by tracing data. > > Below is a sample. The first three entries are final applications of > constraint rules. The rest is newly added by this patchset. > > $ trace-cmd report > ... > hw_interval_param: pcmC0D0p 021/023 PERIOD_SIZE 0 1 [1000 1000] 0 1 [1000 1000] > hw_interval_param: pcmC0D0p 022/023 BUFFER_BYTES 0 1 [8000 8000] 0 1 [8000 8000] > hw_interval_param: pcmC0D0p 023/023 RATE 0 1 [8000 8000] 0 1 [8000 8000] > hw_mask_param: pcmC0D0p 000/023 ACCESS 00000000000000000000000000000001 00000000000000000000000000000001 > hw_mask_param: pcmC0D0p 000/023 FORMAT 00000000000000000000000000000004 00000000000000000000000000000004 > hw_mask_param: pcmC0D0p 000/023 SUBFORMAT 00000000000000000000000000000001 00000000000000000000000000000001 > hw_interval_param: pcmC0D0p 000/023 CHANNELS 0 1 [1 1] 0 1 [1 1] > hw_interval_param: pcmC0D0p 000/023 RATE 0 1 [8000 8000] 0 1 [8000 8000] > hw_interval_param: pcmC0D0p 000/023 PERIOD_TIME 0 1 [125000 125000] 0 1 [125000 125000] > hw_interval_param: pcmC0D0p 000/023 BUFFER_SIZE 0 1 [4000 4000] 0 1 [4000 4000] > hw_interval_param: pcmC0D0p 000/023 TICK_TIME 0 1 [0 0] 0 1 [0 0] > > Takashi Sakamoto (3): > ALSA: pcm: localize snd_pcm_hw_params_choose() > ALSA: pcm: add tracepoints for final selection process of hardware > parameters > ALSA: pcm: use friendly name for id of PCM substream in trace print Applied all three patches (although the cover letter says two :) thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
