[systemd-devel] Allocating resource to achieve predictable run times

[Lennart Poettering]

On Mo, 17.06.19 14:15, John Lane (systemd at jelmail.com) wrote:

Note that I/O might fuck up your measurements. i.e. make sure you have
everything in the page cache already you need, so that you never have
to pagefault.

More importantly though: use isolcpus= on the kernel cmdline to make
sure the kernel will never schedule its own work on the CPUs you want
to exclusively assing to a specific set of units. Make sure with
/proc/interrupts and /proc/irq that all IRQs are properly dispatched
only on the CPUs you don't want your own stuff to run.

Lennart

--
Lennart Poettering, Berlin