Is this just a science experiment or is this for an actual product? If this is for an actual product, you should use your factory contact to get a customized NVM for your part or write a custom driver. Putting ethtool in your init scripts sounds fragile at best.
Please file an IPS through your factory contact if this is a serious effort. Todd Fujinaka Software Application Engineer Datacenter Engineering Group Intel Corporation todd.fujin...@intel.com -----Original Message----- From: Ran Shalit [mailto:ransha...@gmail.com] Sent: Tuesday, March 27, 2018 11:37 AM To: Fujinaka, Todd <todd.fujin...@intel.com> Cc: e1000-devel@lists.sourceforge.net Subject: Re: [E1000-devel] 1000Gb without auto-negotiation On Tue, Mar 27, 2018 at 8:44 PM, Fujinaka, Todd <todd.fujin...@intel.com> wrote: > What did you try and what to you want to do? > I try to use ethtool (in init.d scripts) to turn auto-negotiation off and force 1G. I now understand from your answer that it can't work with igb. My end goal is to reduce boot time till ping success, but I still have long interval from time of igb probe till ping success. I tried many many methods but nothing helped too much, only if I remove auto-negotiation to 100M, I got ~1.5 second less time till link is up, but we probably can't use 100M, because we must work with 1Gb. I first got 3 seconds from igb init till link up (we can name it 1st interval), and 3 seconds from link up till ping success(let's name it 2nd interval). After initialization of ip in bootargs (ip=...) instead of using ifup in init.d, and using static arp, I got ~100msec from link up till ping. Yet, I'm not sure what actual made it less. when removed arp it was still short. 1. Why initialization of ip at start reduced the 1st interval (from init till link is up) ? I also don't understand yet why it takes to much time till igb get link is up (1st interval). It also seems that IGB disable/enable or power down itself (I see that led of phy is turned off during boot) Trying to return from power down (without doing anything) and from phy reset did not help, or made it non-functional at all. 2. How to disable this power down\phy down issue during boot ? These are the function I catch when adding log of function call: [ 1.897306] igb_init_module [ 1.897309] igb: Intel(R) Gigabit Ethernet Network Driver << - version 5.4.0-k [ 1.897310] igb: Copyright (c) 2007-2014 Intel Corporation. << [ 1.897338] igb_probe [ 1.897728] igb_sw_init [ 1.908895] igb_reset [ 1.923042] igb_power_down_link [ 1.926740] Starting network: [ 1.944956] __igb_open [ 1.945005] igb_power_up_link [ 5.043281] igb 0000:03:00.0 eth0: igb: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX [ 7.966910] ping ack success 3. Is there a way to investigate where igb waits for or spends time till link is up ? > You can't turn off auto-negotiation on 1G (as per the 1G spec), but you can > limit what you advertise. > > Todd Fujinaka Thank you very much, ranran > Software Application Engineer > Datacenter Engineering Group > Intel Corporation > todd.fujin...@intel.com > > > -----Original Message----- > From: Ran Shalit [mailto:ransha...@gmail.com] > Sent: Tuesday, March 27, 2018 12:09 AM > To: e1000-devel@lists.sourceforge.net > Subject: [E1000-devel] 1000Gb without auto-negotiation > > Hello, > > > I try to set igb driver without autonegotiation in 1Gb, but it does not seems > to work, (with ethtool or directly in driver). > > Isn't it supported ? > > Regards, > ranran > > ---------------------------------------------------------------------- > -------- Check out the vibrant tech community on one of the world's > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > E1000-devel mailing list > E1000-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/e1000-devel > To learn more about Intel® Ethernet, visit > http://communities.intel.com/community/wired ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
