Changes between Version 5 and Version 6 of PhalUserGuide

Timestamp:

11/07/08 14:03:00 (16 years ago)

Author:

ismael (IP: 62.57.188.40)

Comment:

--

PhalUserGuide

@@ -130 +130 @@
  You can re-enable them substituting 'off' by 'on'.
 
- * Run waveform processes with higher priority.
+ * Run waveform processes with higher priority. Use the optional argument ''-p [priority]'' to set a lower kernel priority to your waveform processes. Normal kernel priorities are 0 and higher, if you choose lower priority for waveform processes, they will low with lower priority which may increase performance and/or time resolution. Use this option with caution, because if your component hangs (i.e. because of an infinite loop), any process would get scheduled, preventing it to be killed, which may totally freeze your computer.
 
- * Increase Kernel time resolution.
+ * Increase Kernel time resolution. Another measure you can adopt to achieve a higher performance can be increasing the kernel timer frequency. To do such you must recompile your kernel. How to do that is out of the scope of this document, however, if you use ''menuconfig'', the option you have to change is at '''Processor type and features->Timer frecuency'''. Setting that to 1000 Hz implies a resolution of 1ms which, with at 10ms slot duration may be quite enough.