[dpdk-dev] DSW eventdev and multi-process DPDK

Venky Venkatesh vvenkatesh at paloaltonetworks.com
Fri Dec 21 19:34:00 CET 2018

On 12/21/18, 10:24 AM, "Mattias Rönnblom" <mattias.ronnblom at ericsson.com> wrote:

    On 2018-12-21 06:13, Venky Venkatesh wrote:
    > Hi,
    > We are considering using a multi-process mode of the DPDK with the event generators and consumers being spread across multiple processes (on different cores). We are also considering using the DSW eventdev. Is the DSW designed for such a use case? If so, are there some restrictions and something specific that need to be done to make it work correctly?
    The purpose of an event device is to do dynamic load balancing across 
    multiple cores. Using the DPDK multiple-process support, with its 
    requirement of having unique, non-overlapping, core masks works against 
    or even defeats this purpose.

[VV]: I don’t understand your last sentence. Suppose I am having multiple packet processing processes (each with a single thread and polling a disjoint set of queues) and each linked to DSW. Each process would invoke the enqueue which will be handled by the DSW linked to that process. Will the DSWs across these processes "collaborate" to get load balancing across the processes?
    Also, if you care about security, you don't want to disable ASLR.
    That said, I can't see any immediate reason why it wouldn't work.

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