netdev - Reduce boot time till ping

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Date:   Thu, 29 Mar 2018 19:20:34 +0300
From:   Ran Shalit <ranshalit@...il.com>
To:     netdev@...r.kernel.org
Subject: Reduce boot time till ping

Hello,

I'm struggling to understand why it takes a lot of time to boot till
we get ping success.
We use system with i210 , and igb driver.
I use dmesg for time measurement( and gpios to sync dmesg timing with
board power time)

This is dmesg with added prints for each IGB function enter and exit time:
https://drive.google.com/file/d/1Zdxp_fljawrzpuM4Q0at5YH6yOahoSse/view?usp=sharing

I see that driver use some watchdog to decide if link is up (as can be
seen in the above log), yet I don't understand why it takes so long
from kernel start till ping success.

Even when link is up it still take a long interval from link up till
ping success, as you can see in the log file.

I can't disable auto-negotiation because we need to use 1Gb.
Is there anything else I can do ?

Thank you,
ranran