netdev - Re: netif_receive_skb is taking long time

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Message-Id: <20181025.104310.1362475664274438273.davem@davemloft.net>
Date:   Thu, 25 Oct 2018 10:43:10 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     keyurp@...inx.com
Cc:     eric.dumazet@...il.com, netdev@...r.kernel.org
Subject: Re: netif_receive_skb is taking long time

From: Keyur Amrutbhai Patel <keyurp@...inx.com>
Date: Thu, 25 Oct 2018 17:22:02 +0000

> Current time consuming function are " netif_receive_skb " and "
> napi_alloc_skb " these two function calls are taking maximum about
> of time

netif_receive_skb() calls the entire networking stack receive path.
So measuring it by itself it not very useful.

Use 'perf' or a similar tool to fully profile the kernel and get a
more detailed analysis.