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Date:      Tue, 25 Feb 2020 22:27:06 +0000
From:      "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
To:        "Hiroki Sato" <hrs@FreeBSD.org>
Cc:        micchie.gml@gmail.com, hackers@freebsd.org
Subject:   Re: Slow PXE boot
Message-ID:  <79AD3725-FDCC-4045-A620-EDB25D88FA65@lists.zabbadoz.net>
In-Reply-To: <15F7FD1E-3957-4D9E-922F-394D50445BA8@lists.zabbadoz.net>
References:  <20200224032300.00006290@gmail.com> <8F7B8958-5295-4A26-82E9-94C7A62ED8A1@longcount.org> <CA%2BSc9E0NNi8ViwXCn-Hif2_RQOnu11RLEMRUT2kOAaouLNySvQ@mail.gmail.com> <20200226.055717.1795667435522458112.hrs@FreeBSD.org> <15F7FD1E-3957-4D9E-922F-394D50445BA8@lists.zabbadoz.net>

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On 25 Feb 2020, at 21:02, Bjoern A. Zeeb wrote:

> On 25 Feb 2020, at 20:57, Hiroki Sato wrote:
>
> Hi,
>
>> Michio Honda <micchie.gml@gmail.com> wrote
>>   in 
>> <CA+Sc9E0NNi8ViwXCn-Hif2_RQOnu11RLEMRUT2kOAaouLNySvQ@mail.gmail.com>:
>>
>> mi> Hi,
>> mi>
>> mi> I had a similar problem before, and the solution was the use of 
>> pxeboot
>> mi> file taken from FreeBSD 10 as suggested by Hiroki.
>>
>>  I could not reproduce this by using my boxes after all, but 
>> replacing
>>  pxeboot with the older one was useful to gain the normal speed at
>>  that time probably because of difference between new (11 or later)
>>  loader's nfs client and the old one.  It was a problem sending a lot
>>  of duplicated packets for some reason, not just a matter of the
>>  buffer size.  And the server side was Linux.
>>
>>  Have anyone else also experienced this kind of very slow PXE 
>> booting?
>>  It may be specific to using a Linux NFS server.
>
> I see it on zoo all day long for ages.  I’ll go back and try an old 
> pxeboot; if that really speeds things up massively I might even be 
> willing to debug this a bit more.

I found a pxeboot from FreeBSD 7 and while it did not entirely work the 
kernel was loaded in seconds rather than minutes (felt).

I guess it’s time to dig into the changes from back then..

/bz



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