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Subject: Re: speeding up pxe netboot
To: freebsd-questions@freebsd.org
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From: Anton Yuzhaninov <citrin+bsd@citrin.ru>
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Date: Thu, 2 Mar 2017 20:22:16 -0500
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On 03/02/17 15:13, Mike Tancsa wrote:
 > The slow part seems to be on the boot up from
 > /boot/kernel/kernel text=0x1532060 \
....
 > Nothing in the tcpdumpd jumps out
 >
 > 12:08:23.719761 IP 10.0.0.42.987 > 10.0.0.1.2049: NFS request xid 738
 > 104 lookup fh
 > Unknown/888D10CADE13D1BC0A0018680400000059813E000000000000000000
 > "kernel"
 > 12:08:23.719924 IP 10.0.0.1.2049 > 10.0.0.42.987: NFS reply xid 738
 > reply ok 236 lookup fh
 > Unknown/888D10CADE13D1BC0A00018004000000568B3E000000000000000000

1. May be there a big delay after tftp request for pxeboot and starting 
NFS transfer? Try to check tcpdump starting from dhcp/pxe requests.

2. Try to increase nfs.read_size, see pxeboot(8).