> On Nov 7, 2016, at 15:04, Denny Page <dennyp...@me.com> wrote:
> The kernels are Linux 4.4.26, configured for low latency. I’ll follow up with
> the list of kernel configuration parameters I use. Both the kernels and
> chrony are built with mtune=native.
For the kernel configuration, the general guideline I follow is to build a
static kernel with no modules and only the drivers/features I need enabled.
This can take a bit of effort the first time around for a piece of hardware,
but thereafter it’s relatively easy. Regardless of the hardware, I have listed
some of the general parameters that I consider important for low latency below.
Note that the configuration parameters that are not set are just as important
as the ones that are.
# CONFIG_MODULES is not set
CONFIG_NR_CPUS=<SET TO ACTUAL NUMBER>
# CONFIG_SCHED_SMT is not set
# CONFIG_PM is not set
# CONFIG_CPU_FREQ is not set
# CONFIG_CPU_IDLE is not set
There is always room for improvement, so feedback is welcome.
In addition to the kernel, I disable eee and interrupt coalescing on the