From: Eric Dumazet <eric.dumazet@gmail.com>
To: Keyur Amrutbhai Patel <keyurp@xilinx.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: Re: netif_receive_skb is taking long time
Date: Thu, 25 Oct 2018 10:08:23 -0700 [thread overview]
Message-ID: <5d039fa2-95fc-dbdf-4ab0-d5cccebe8bcc@gmail.com> (raw)
In-Reply-To: <BN6PR02MB2641D863865B2498ACD2043DB7F70@BN6PR02MB2641.namprd02.prod.outlook.com>
On 10/25/2018 08:39 AM, Keyur Amrutbhai Patel wrote:
> Hi,
>
> In my NIC driver "netif_receive_skb" is taking too long time. Almost 3375 neno seconds. Which is more than whole packet processing from interrupt.
>
> Could anyone please help me to understand what could be the reason behind this? How to solve it to take minimum time?
>
> Is there any standard calls which we need to follow in order to get faster performance?
>
First step would be to read Documentation/networking/scaling.txt and see if anything there helps.
Have you tried to profile the kernel and see if some contention or hot function appears ?
Maybe use a faster cpu, or remove not needed features like too heavy netfilter rules.
We can not really answer your question, you do not provide enough information.
next prev parent reply other threads:[~2018-10-26 1:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-25 15:39 netif_receive_skb is taking long time Keyur Amrutbhai Patel
2018-10-25 17:05 ` Keyur Amrutbhai Patel
2018-10-25 17:08 ` Eric Dumazet [this message]
2018-10-25 17:22 ` Keyur Amrutbhai Patel
2018-10-25 17:32 ` Eric Dumazet
2018-10-25 17:43 ` David Miller
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