[uae] Re: Source code snapshot 20060505
- From: Stephen Anthony <stephena@xxxxxxxxxxxxxxxxxxxxx>
- To: uae@xxxxxxxxxxxxx
- Date: Mon, 8 May 2006 19:39:54 -0230
On Monday 08 May 2006 19:50, Richard Drummond wrote:
> I've recently noticed that the performance of the SDL sound driver
> has gotten a lot worse with the latest 2.6 kernels and E-UAE is
> hogging the CPU (due to one of the cases above). Using the OSS or
> ALSA drivers here leads to much better performance.
Most 2.6.x kernels had a timeslice frequency of 1000Hz, meaning a
granularity of 1ms (whereas 2.4 kernels it was 100Hz/10ms). The very
latest 2.6 kernels have increased the frequency to 250Hz, which is a
4ms granularity. That might have been enough to cause a difference.
This is all configurable in the kernel, of course, but it now defaults
to 250Hz.
Steve
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