> Which kernel did you choose (among those available in the portage tree) > and > how did you customise it? Ok few month ago here is what I did : I have downloaded on kernel.org website : - the vanilla kernel 2.6.11 (sorry no gentoo kernel) - the 2.6.12-rc3 patch - the realtime-preempt-2.6.12-rc3-V0.7.46-02 patch (ingo molnar patch) I have applied the patches in the same order I have downloaded them then I have setup the symlink linux -> kernel-2.6.11 and I ran : # genkernel --menuconfig all then I configure my kernel like that : CONFIG_PREEMPT_DESKTOP=y CONFIG_PREEMPT=y CONFIG_PREEMPT_SOFTIRQS=y CONFIG_PREEMPT_HARDIRQS=y CONFIG_PREEMPT_RCU=y CONFIG_PREEMPT_BKL=y CONFIG_DEBUG_PREEMPT=y CONFIG_PREEMPT_TRACE=y CONFIG_SECURITY=y CONFIG_SECURITY_CAPABILITIES=m *advice wellcome if wrong or silly parameters are set* Then I have downloaded the Realtime lsm module on the jack website and follow the INSTALL documentation (really clear) You can tweek your softirqs and hardirqs parameters, put the realtime module to be loaded at the startup and you should go at low low latencies (tell us the result!) Hope it will helps. For Gentoo issues please ask me out of the LAU list. Now you should adapt this methodology to the more current kernel sources (i.e. 2.6.13) Regards Philippe
