2007/10/19, Chuck Ebbert <[EMAIL PROTECTED]>: > On 10/01/2007 02:15 AM, Mikhail Kshevetskiy wrote: > > Hello, > > > > I have ASUS F3T notebook with dualcore AMD processor. It has c1e feature > > enabled. I test linux-2.6.23-rc8-hrt1 kernel. Everything is work (thanks > > to lapic disable patch), but i have to many processor interrupts per > > seconds (about 260 additional timer interrupts). > > > > The same situation can be observed for linux-2.6.22. Moreover the same > > problem exist with i386 kernel (test with 2.6.21, 2.6.22, 2.6.22-hrt6, > > 2.6.23-rc5-hrt1). > > > > The problem disappear when I disable c1e on both cores. In this case > > lapic is not disabled. The back side of this patch is the disabling of > > all C-state including C1. As result the power consumption increase from > > 23 (c1e enabled) to 27 (c1e disabled) watts. > > > > I fill something wrong here. > > Is it possible to reduce the amount of timer interrupts? > > Is it possible to force enable C1,C2 and C3 states when c1e disabled? > > > > How are you disabling C1E? > > dirty hack, i just follow the FreeBSD way and clear C1e bit in lapic initialization code. I make it for test purpose only, so i do not produce a patch.
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