add a section about playback smoothness and ways to improve it by kernel tuning

CVS patchset: 4615
CVS date: 2003/04/15 17:30:29

1 files changed, 18 insertions, 0 deletions

diff --git a/doc/faq/faq.txt b/doc/faq/faq.txt
index c9d91b7d4..181770709 100644
--- a/doc/faq/faq.txt
+++ b/doc/faq/faq.txt
@@ -61,6 +61,8 @@ Table of Contents
 4. Running xine
    
     I have a lot of dropped frames - what can I do?
+    Oki, xine doesn't drop frames now but video output still is not really
+        smooth
     I have problems when using xine on FreeBSD, Solaris, ... !
     What is aalib? How do I use it in xine?
     What do all these ~/.xine/config (~/.gxine/config) entries mean?
@@ -767,6 +769,22 @@ optimizing options. A few things you should check (in order of importance):
    
 -------------------------------------------------------------------------------
 
+Oki, xine doesn't drop frames now but video output still is not really smooth
+
+video output can be further improved by tuning your linux kernel:
+
+  * set HZ to 1000 in /usr/src/linux/include/asm-i386/param.h
+   
+  * try applying scheduler patches, especially the O(1) and the preemptive
+    patches have proven useful at the time of this writing (spring 2003).
+   
+linux 2.5/2.6 will probably have these improvements out of the box.
+
+Miguel Freitas has written a nice article about his kernel multimedia
+experiments here.
+
+-------------------------------------------------------------------------------
+
 I have problems when using xine on FreeBSD, Solaris, ... !
 
 Check out the the corresponding README files in the directory xine-lib/doc