Hello,
I use the gentoo kernel series for my production systems. On my gaming system, I have a 2.6.22-gentoo-r8 kernel that works very well for gaming (bzflag). It an amd64 with 2 gig of ram. I've tried to build a 2.6.23-getnoo-r3 kernel for gaming and it performs very poorly with no other changes except to recompile the ati-drivers and bzflag. (too much jitter and too much lag). The game jerks around the updates to the graphics and the game kicks me off for too much jitter and lag. I can revert back to the 2.6.22-gentoo-r8 kernel and everything is still fast without issues. I build and keep several kernels so building one for testing evaluation is not a problem, (gotta love grub). At first I made no changes between the 2 kernels. Now I have tried to lower the clock settings and such to make things more real time. Nothing I have tried seems to work as good and the old setting (2.6.22-r8) and those setting do not work for 2.6.23-r3.+ Here are some of the config-2.6.23-gentoo-r3 kernel settings for kernel-2.6.23-gentoo-r3. I'm looking for suggestion on kernel build parameters to change, or an explanation as to how to build (optimize) a kernel for gaming. CONFIG_X86_64=y CONFIG_64BIT=y CONFIG_X86=y CONFIG_GENERIC_TIME=y CONFIG_GENERIC_TIME_VSYSCALL=y CONFIG_GENERIC_CMOS_UPDATE=y CONFIG_ZONE_DMA32=y CONFIG_LOCKDEP_SUPPORT=y CONFIG_STACKTRACE_SUPPORT=y CONFIG_SEMAPHORE_SLEEPERS=y CONFIG_MMU=y CONFIG_ZONE_DMA=y CONFIG_RWSEM_GENERIC_SPINLOCK=y CONFIG_GENERIC_HWEIGHT=y CONFIG_GENERIC_CALIBRATE_DELAY=y CONFIG_X86_CMPXCHG=y CONFIG_EARLY_PRINTK=y CONFIG_GENERIC_ISA_DMA=y CONFIG_GENERIC_IOMAP=y CONFIG_ARCH_MAY_HAVE_PC_FDC=y CONFIG_ARCH_POPULATES_NODE_MAP=y CONFIG_DMI=y CONFIG_AUDIT_ARCH=y CONFIG_GENERIC_BUG=y # CONFIG_ARCH_HAS_ILOG2_U32 is not set # CONFIG_ARCH_HAS_ILOG2_U64 is not set CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config" # General setup # CONFIG_EXPERIMENTAL=y CONFIG_LOCK_KERNEL=y CONFIG_INIT_ENV_ARG_LIMIT=32 CONFIG_LOCALVERSION="" # CONFIG_LOCALVERSION_AUTO is not set CONFIG_SWAP=y CONFIG_SYSVIPC=y CONFIG_SYSVIPC_SYSCTL=y CONFIG_POSIX_MQUEUE=y # CONFIG_BSD_PROCESS_ACCT is not set # CONFIG_TASKSTATS is not set # CONFIG_USER_NS is not set # CONFIG_AUDIT is not set CONFIG_IKCONFIG=y CONFIG_IKCONFIG_PROC=y CONFIG_LOG_BUF_SHIFT=15 # CONFIG_CPUSETS is not set CONFIG_SYSFS_DEPRECATED=y # CONFIG_RELAY is not set CONFIG_BLK_DEV_INITRD=y CONFIG_INITRAMFS_SOURCE="" CONFIG_CC_OPTIMIZE_FOR_SIZE=y CONFIG_SYSCTL=y # CONFIG_EMBEDDED is not set CONFIG_UID16=y CONFIG_SYSCTL_SYSCALL=y CONFIG_KALLSYMS=y # CONFIG_KALLSYMS_EXTRA_PASS is not set CONFIG_HOTPLUG=y CONFIG_PRINTK=y CONFIG_BUG=y CONFIG_ELF_CORE=y CONFIG_BASE_FULL=y CONFIG_FUTEX=y CONFIG_ANON_INODES=y CONFIG_EPOLL=y CONFIG_SIGNALFD=y CONFIG_EVENTFD=y CONFIG_SHMEM=y CONFIG_VM_EVENT_COUNTERS=y CONFIG_SLAB=y # CONFIG_SLUB is not set # CONFIG_SLOB is not set CONFIG_RT_MUTEXES=y # CONFIG_TINY_SHMEM is not set CONFIG_BASE_SMALL=0 CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y # CONFIG_MODULE_FORCE_UNLOAD is not set CONFIG_MODVERSIONS=y # CONFIG_MODULE_SRCVERSION_ALL is not set CONFIG_KMOD=y CONFIG_STOP_MACHINE=y CONFIG_BLOCK=y # CONFIG_BLK_DEV_IO_TRACE is not set # CONFIG_BLK_DEV_BSG is not set # IO Schedulers # CONFIG_IOSCHED_NOOP=y # CONFIG_IOSCHED_AS is not set CONFIG_IOSCHED_DEADLINE=y CONFIG_IOSCHED_CFQ=y # CONFIG_DEFAULT_AS is not set # CONFIG_DEFAULT_DEADLINE is not set CONFIG_DEFAULT_CFQ=y # CONFIG_DEFAULT_NOOP is not set CONFIG_DEFAULT_IOSCHED="cfq" # Processor type and features # CONFIG_X86_PC=y # CONFIG_X86_VSMP is not set CONFIG_MK8=y # CONFIG_MPSC is not set # CONFIG_MCORE2 is not set # CONFIG_GENERIC_CPU is not set CONFIG_X86_L1_CACHE_BYTES=64 CONFIG_X86_L1_CACHE_SHIFT=6 CONFIG_X86_INTERNODE_CACHE_BYTES=64 CONFIG_X86_TSC=y CONFIG_X86_GOOD_APIC=y CONFIG_MICROCODE=y CONFIG_MICROCODE_OLD_INTERFACE=y CONFIG_X86_MSR=y CONFIG_X86_CPUID=y CONFIG_X86_IO_APIC=y CONFIG_X86_LOCAL_APIC=y CONFIG_MTRR=y CONFIG_SMP=y CONFIG_SCHED_SMT=y CONFIG_SCHED_MC=y # CONFIG_PREEMPT_NONE is not set # CONFIG_PREEMPT_VOLUNTARY is not set CONFIG_PREEMPT=y CONFIG_PREEMPT_BKL=y CONFIG_NUMA=y CONFIG_K8_NUMA=y CONFIG_NODES_SHIFT=6 CONFIG_X86_64_ACPI_NUMA=y CONFIG_NUMA_EMU=y CONFIG_ARCH_DISCONTIGMEM_ENABLE=y CONFIG_ARCH_DISCONTIGMEM_DEFAULT=y CONFIG_ARCH_SPARSEMEM_ENABLE=y CONFIG_SELECT_MEMORY_MODEL=y # CONFIG_FLATMEM_MANUAL is not set CONFIG_DISCONTIGMEM_MANUAL=y # CONFIG_SPARSEMEM_MANUAL is not set CONFIG_DISCONTIGMEM=y CONFIG_FLAT_NODE_MEM_MAP=y CONFIG_NEED_MULTIPLE_NODES=y # CONFIG_SPARSEMEM_STATIC is not set # CONFIG_MEMORY_HOTPLUG is not set CONFIG_SPLIT_PTLOCK_CPUS=4 CONFIG_MIGRATION=y CONFIG_RESOURCES_64BIT=y CONFIG_ZONE_DMA_FLAG=1 CONFIG_BOUNCE=y CONFIG_VIRT_TO_BUS=y CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID=y CONFIG_OUT_OF_LINE_PFN_TO_PAGE=y CONFIG_NR_CPUS=32 CONFIG_PHYSICAL_ALIGN=0x200000 CONFIG_HOTPLUG_CPU=y CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y CONFIG_HPET_TIMER=y # CONFIG_HPET_EMULATE_RTC is not set CONFIG_IOMMU=y # CONFIG_CALGARY_IOMMU is not set CONFIG_SWIOTLB=y CONFIG_X86_MCE=y # CONFIG_X86_MCE_INTEL is not set CONFIG_X86_MCE_AMD=y # CONFIG_KEXEC is not set # CONFIG_CRASH_DUMP is not set # CONFIG_RELOCATABLE is not set CONFIG_PHYSICAL_START=0x200000 # CONFIG_SECCOMP is not set # CONFIG_CC_STACKPROTECTOR is not set CONFIG_HZ_100=y # CONFIG_HZ_250 is not set # CONFIG_HZ_300 is not set # CONFIG_HZ_1000 is not set CONFIG_HZ=100 CONFIG_K8_NB=y CONFIG_GENERIC_HARDIRQS=y CONFIG_GENERIC_IRQ_PROBE=y CONFIG_ISA_DMA_API=y CONFIG_GENERIC_PENDING_IRQ=y James -- [EMAIL PROTECTED] mailing list
