From: Jakub Kicinski <kuba@kernel.org>
To: Nick Child <nnac123@linux.ibm.com>
Cc: netdev@vger.kernel.org, bjking1@linux.ibm.com,
haren@linux.ibm.com, ricklind@us.ibm.com
Subject: Re: [PATCH net-next] ibmvnic: Toggle between queue types in affinity mapping
Date: Tue, 24 Jan 2023 18:39:25 -0800 [thread overview]
Message-ID: <20230124183925.257621e8@kernel.org> (raw)
In-Reply-To: <20230123221727.30423-1-nnac123@linux.ibm.com>
On Mon, 23 Jan 2023 16:17:27 -0600 Nick Child wrote:
> A more optimal algorithm would balance the number RX and TX IRQ's across
> the physical cores. Therefore, to increase performance, distribute RX and
> TX IRQs across cores by alternating between assigning IRQs for RX and TX
> queues to CPUs.
> With a system with 64 CPUs and 32 queues, this results in the following
> pattern (binding is done in reverse order for readable code):
>
> IRQ type | CPU number
> -----------------------
> TX15 | 0-1
> RX15 | 2-3
> TX14 | 4-5
> RX14 | 6-7
Seems sensible but why did you invert the order? To save LoC?
next prev parent reply other threads:[~2023-01-25 2:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-23 22:17 [PATCH net-next] ibmvnic: Toggle between queue types in affinity mapping Nick Child
2023-01-25 2:39 ` Jakub Kicinski [this message]
2023-01-25 16:55 ` Nick Child
2023-01-25 18:14 ` Jakub Kicinski
2023-01-25 19:16 ` Rick Lindsley
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