polling's future [was: Re: Dynamic Ticks/HZ]

Poul-Henning Kamp phk at phk.freebsd.dk
Tue Nov 6 10:27:40 UTC 2012

In message <5098E526.6070101 at freebsd.org>, Andre Oppermann writes:

>Hi Luigi,
>do you agree on polling having outlived its usefulness in the light
>of interrupt moderating NIC's and SMP complications/disadvantages?

Can I just point out, that what we have is not in fact "device-polling"
but only "some-kinds-of-network-interface-polling" ?

I think it should go away, and if there still is a relevant
usage segment, be replaced by _real_ "device-polling" which is
not tied to the network stack.

Amongst the sensible uses for that would be high-speed serial
interfaces etc.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

More information about the freebsd-current mailing list