Re: impact on performance by querying Chelsio NIC filter rules

Reply: mike tancsa : "Re: impact on performance by querying Chelsio NIC filter rules"
In reply to: mike tancsa : "impact on performance by querying Chelsio NIC filter rules"
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From: Navdeep Parhar <np_at_FreeBSD.org>
Date: Tue, 14 Jun 2022 19:13:18 UTC

On 6/14/22 7:46 AM, mike tancsa wrote:
> Hi All,
> 
>      I have been making use of the built in filtering capabilities of 
> the Chelsio 10G and above NICs with great success so far. I have a new 
> project that would mean querying the card (via cxgbetool t5nex0 filter 
> list) every 5-10 seconds.  Does the act of retrieving those values have 
> any impact on the performance of the card ? I have about 50 rules right 
> now.

Filter retrieval in cxgbe is a lightweight activity involving a few PCIe 
writes and reads.  It has no impact on the performance of the hardware's 
data path.

Regards,
Navdeep