[Devil-linux-commit] build/scripts/configuration/help prepare.help,1.2,1.3

[Heiko Z. <smi...@us...>]

Update of /cvsroot/devil-linux/build/scripts/configuration/help
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv13992/scripts/configuration/help

Modified Files:
	prepare.help 
Log Message:
variable HZ patch by Jaroslav Kysela


Index: prepare.help
===================================================================
RCS file: /cvsroot/devil-linux/build/scripts/configuration/help/prepare.help,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -d -r1.2 -r1.3
--- prepare.help	20 Dec 2003 17:05:36 -0000	1.2
+++ prepare.help	22 Mar 2004 01:34:06 -0000	1.3
@@ -29,6 +29,24 @@
  - 486
  - 586
  - 686 for VIA C3-2 "Nehemiah" support.
+
+CONFIG_HZ
+ This option is for 2.4 kernels. It allows to set the system timer
+ to specified HZ value which might help to improve latency when
+ more CPU intensive tasks are running on the router. Also, it affects
+ the kernel packet schedulers when CONFIG_PSCHED_CLOCK_SOURCE is
+ set to PSCHED_JIFFIES (highter CONFIG_HZ value -> better precision).
+
+ The standard value is 100Hz.
+
+CONFIG_PSCHED_CLOCK_SOURCE
+ This option determines the clock source for network packet schedulers.
+
+ PSCHED_GETTIMEOFDAY - slow method, but accurate
+ PSCHED_JIFFIES      - default fast method, depending on the system HZ value
+		       (2.4 kernels - see CONFIG_HZ, 2.6 kernels - 1000Hz);
+		       this method is not very accurate for low HZ values
+ PSCHED_CPU	     - fast method, works only for 686 CPUs
  
 CONFIG_PMAKE
  Number of parallel build jobs on the compilation process of DL.