Giovanni Maruzzelli wrote: > Yes, CONFIG_PREEMPT* are probably different between the various > kernels, and also the compiled kernel is tickless. > > But, this is a problem only with snd-dummy. The interrupts of other drivers are based on the PCM stream clock, but the snd-dummy driver has to emulate interrupts using the system timer, so it is the only one affected by timer-related changes. > What I would like, in the interest of users, is snd-dummy to be > modified in a way that makes it working on the regular CentOS-RHEL > kernels, The driver relies on the kernel's system timer. It might be possible to rewrite it to use high-resolution timers, if the CentOS kernels supports it. It would be easier to try to change the constraints of the sound card that snd-dummy tries to emulate; set USE_PERIODS_MIN to four or so, and increase period_bytes_min to some value that is at least as large as the numer of bytes per timer tick (with 2 channels and 16 bits at 48 kHz, there are 192000 bytes per second). HTH Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
