Re: [PATCH v6 net-next 2/5] net: implement support for low latencysocket polling

[yaniv saar]

Hi Eliezer,

(If I'm too late then a future note...)
Why make polling a system-wide configuration?
Wouldn't it make more sense to implement a sock option?
An even better solution might be aggregation/combination of both types
of configurations.

-- Yaniv Sa'ar


On Wed, May 29, 2013 at 5:14 PM, Or Gerlitz <or.gerlitz@xxxxxxxxx> wrote:
> On Wed, May 29, 2013 at 9:39 AM, Eliezer Tamir
> <eliezer.tamir@xxxxxxxxxxxxxxx> wrote:
>> Adds a new ndo_ll_poll method and the code that supports and uses it.
>> This method can be used by low latency applications to busy poll Ethernet
>> device queues directly from the socket code. The value of sysctl_net_ll_poll
>> controls how many microseconds to poll. Set to zero to disable.
>
> Unlike with TCP sockets, UDP sockets may receive packets from multiple
> sources and hence the receiving context may be steered to be executed
> on different cores through RSS or other Flow-Steering HW mechanisms
> which could mean different napi contexts for the same socket, is that
> a problem here? what's the severity?
>
> Or.
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/