Messages in this thread | | | Date | Sat, 17 Apr 2004 22:28:42 +0200 (MEST) | From | Mikael Pettersson <> | Subject | Re: SATA support merge in 2.4.27 |
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On Sat, 17 Apr 2004 13:36:11 +0200, Andi Kleen wrote: >Andreas Hartmann <andihartmann@01019freenet.de> writes: > >> Marcelo Tosatti wrote: >>> On Fri, Apr 16, 2004 at 10:51:02AM -0300, Marcelo Tosatti wrote: >>> And again, unfortunately not everyone is running v2.6 on their production >>> environment, yet. >> >> That's right! I certainly won't run it before 2.6.20 or even higher on >> desktops. For example, 2.6 vanilla is much to slow (about 9%), even on >> desktops - tested with compiling. It must be fixed. > >This most likely comes from the 1ms timer tick vs 10ms previously. I >doubt this will change in mainline, but you can change it yourself >with an easy tweak. Just change the HZ parameter back to 100
I have a patch which adds CONFIG_HZ for the i386 and ppc architectures, allowing you to choose HZ==1000, HZ==100, or HZ=512. I originally wrote it because my oldest test box (a 486) loses lots of timer interrupts during heavy disk I/O otherwise, but I also use it on less handicapped boxes because I find HZ==1000 to be wasteful and of little value for me.
http://www.csd.uu.se/~mikpe/linux/patches/2.6/patch-config-hz-2.6.6-rc1
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