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From: farooq basha <farooq.juturu@gmail.com>
To: dev@dpdk.org
Subject: [dpdk-dev] Regarding HQOS with run-to-completion Model
Date: Mon, 28 Apr 2025 16:55:07 +0530	[thread overview]
Message-ID: <CA+xuiv2jL934JR_QyLC1M5A+5dGPzw5L0=4RoS98eRjueA+9-g@mail.gmail.com> (raw)

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Hello DevTeam,

    I am planning to use DPDK HQOS for Traffic shaping with a
run-to-completion Model. While I was reading the dpdk-qos document, I came
across the following statement.

"*Running enqueue and dequeue operations for the same output port from
different cores is likely to cause significant impact on scheduler’s
performance and it is therefore not recommended"*

 Let's take an  example, Port1  & Port2 have 4 Rx queues and each Queue
mapped to a different CPU. Traffic coming on port1  gets forwarded to port2
. With the above limitation application needs to take a lock before doing
rte_sched_port_enqueue & dequeue operation. Performance is limited to only
1 CPU even though Traffic is coming on 4 Different CPUs.

Correct me if my understanding is Wrong?

Thanks
Basha

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                 reply	other threads:[~2025-05-05 12:55 UTC|newest]

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