#Cpuidle Driver For Intel Processors drivers#
#Cpuidle Driver For Intel Processors code#

Memory placement aware NUMA scheduler: Y, STD, if lscpu lists >1 NUMA node.Printk indexing debugfs interface: N, DEV.Temporary per-CPU printk log buffer size: 12 or 13.CPU kernel log buffer size contribution: 12.Enable kernel headers through /sys/kernel/: N, not useful yet.config through /proc/config.gz: Y, useful Offload RCU callback processing from boot-selected CPUs: N, BIG.Accelerate last non-dyntick-idle CPU's grace periods: N, EMB/BIG.Tree-based hierarchical RCU leaf-level fanout value: 16, default, BIG.Tree-based hierarchical RCU fanout value: 64, default, BIG.Make expert-level adjustments to RCU configuration: N, DEV, BIG.Require boot parameter to enable pressure stall information tracking: N, enables it by default.Pressure stall information tracking: Y, atop can use it.Enable per-task storage I/O accounting: Y, for iotop.Enable extended accounting over taskstats: Y, for latencytop.Enable per-task delay accounting: Y, for latencytop.Export task/process statistics through netlink: Y, for KVM and latencytop.BSD Process Accounting version 3 file format: Y.Fine granularity task level IRQ time accounting: N, DEV.Cputime accounting: 'Simple tick based cputime accounting'.Preemption behaviour defined on boot: N.Preemption Model: 'Preemptible Kernel (Low-Latency Desktop)' gives best results.Preload BPF file system with kernel specific program and map iterators: N, DEV.Disable unprivileged BPF by default: N, SEC.Clocksource watchdog maximum allowable skew (in us): 100.

Timer tick handling: 'Idle dynticks system', you won't have a use case for 'Full dynticks system', don't choose 'Periodic timer ticks'.Enable system-call auditing support: Y, REC, RM.Enable process_vm_readv/writev syscalls: Y, STD.System V IPC: Y, STD, Apache needs it for example.Support for paging of anonymous memory: Y, STD, even if you don't use swap.Default hostname: empty, EMB, set only if you compile specially for a machine, will be superseded by a command-line option.Kernel compression mode: Gzip, most compatible, size doesn't matter.Automatically append version information to the version string: N, DEV, not necessary.Local version - append to kernel release: empty, add something if you play or bisect.

#Cpuidle Driver For Intel Processors drivers#

Compile also drivers which will not load: N, DEV.

General architecture-dependent options ->Įxecutable file formats / Emulations -> Main page make menuconfig will bring up this screen.

VGUEST: for running the kernel as a guest on a hypervisor.

VHOST: for running the kernel as a hypervisor/host for virtual machines.

COMPAT: recommended for backwards compatibility.

It will get enabled automatically if needed.

AUTO: no need to enable this manually.

SEC: has security implications: enabling the option may make your system either more or less secure.

RM: removed, no longer present in newer kernels.

OLD: modern systems don't need or shouldn't need it, opposite of STD.

REC: recommended feature to enable, a bit weaker than STD.

STD: a standard feature that you can't easily live without, most people need or is generally good to have.

BIG: for big machines with hundreds of CPUs and TBs of RAM or HPC.

EMB: for embedded systems / development, does not apply to other systems, opposite of BIG.Īll those Arduino, Pi, Atom, Androids, Exynos, ARM and whatnot.

DEV: useful for kernel development/debugging only, not for the general user.

I am using the following ackronyms in the comments:

#Cpuidle Driver For Intel Processors code#

I am not a kernel developer, even if I can find my way around in the code quite well. Should really recommend for or against a certain option or I got something upside down, please email me. If you feel that there is a mistake and I It omits whole categories that are not relevant on such systems. This article does not describe every possible config option because Please always refer also to the help text of the Just the standard stuff for running Linux. I am not talking about embedded devices, development, big iron, other platforms, exotic hardware or Hardware that is typically found in netbooks, laptops, desktops or off-the-shelf servers. This shall be a guide to configuring a Linux kernel for popular and modern x86_64 commodity