Messages in this thread | | | Date | Fri, 11 Aug 2017 10:35:19 -0500 (CDT) | From | Christopher Lameter <> | Subject | Re: [RFC PATCH 0/9] Introduce housekeeping subsystem |
| |
On Fri, 11 Aug 2017, Chris Metcalf wrote:
> > > Maybe a CONFIG_HOUSEKEEPING_BOOT_ONLY as a way to restrict housekeeping > > > by default to just the boot cpu. In conjunction with NOHZ_FULL_ALL you > > > would > > > then get the expected semantics. > > A big box with only the boot cpu for housekeeping is likely screwed. > > Fair point - this kind of configuration would be primarily useful for > dedicated systems that were running a high-traffic-rate networking > application on many cores, for example. In this mode you don't end up > putting a lot of burden on the housekeeping core. In any case, > probably not worth adding an additional kernel config for.
The standard server config at this point is a two NUMA node with lots of cores on each. For such a thing a single housekeeping cpu is usually sufficient. Having a rather large number of NUMA nodes is unusual.
The question is also what is considered a "large" system at this point? Lots of cores? Lots of NUMA nodes?
Ah, Chris since you are here: What is happening with the dataplane patches?
| |