What's the status of parallel netisr?

[Jian Qiu]

Interesting.

I did a test on local UDP throughput.

I was surprised to find out the performance with a SMP kernel was
worse than UP. (~74MB/s v.s. 96 MB/s).

I had though parallel netisr might be a solution.

Anyway, thanks for the info.

On Tue, Sep 16, 2008 at 3:46 PM, Kris Kennaway <kris at freebsd.org> wrote:
> Jian Qiu wrote:
>>
>> I noticed there was a project trying to parallelize netisr in SMP.
>>
>> But I cannot find the relevant codes in either stable 7 or current 8.
>>
>> I'm wondering what's the current status of this project?
>>
>> When will it be merged into FreeBSD source tree?
>
> It's available in a perforce branch owned by rwatson (sorry, I don't have
> the branch name handy), but in my tests it either produced no benefits, or
> actually reduced performance.  This is surprising and the reasons for this
> are still unknown.
>
> Kris
>