On Mon, Oct 21, 2024 at 10:42:49AM -0400, Cheng Cui wrote:
Change the subject to `Performance test for CUBIC in stable/14`, was `Re:
Performance issues with vnet jails + epair + bridge`.
I actually prepared two patches, one depends on the other:
https://reviews.freebsd.org/D47218 << apply this patch firstly
https://reviews.freebsd.org/D47213 << apply this patch secondly
Please let me know if you have any questions.
Hi,
What version (git -C /usr/src rev-list --count --first-parent HEAD) did you
patch?
I installed FreeBSD-14.1-STABLE-amd64-20241017-d36ba3989ca9-269125-disc1.iso and
then updated the sources with git before checking out stable/14 which is
n269252, applying the patches and building/installing kernel from there.
What's the exact iperf command you're using please? I'm using
# iperf --time 60 -c 192.168.1.232
but I'm not sure [see note a] if that one would give comparable tests to yours.
In my context, the bge0 interface has hardware offloading enabled (as it does by
default)
Here's before and after patch results. The reference speed is that of the bhyve
host.
There seems to be a large delta between fastest and slowest speeds.
1. bhyve host
[ ID] Interval Transfer Bandwidth
[ 1] 0.00-60.03 sec 6.58 GBytes 941 Mbits/sec
2. 20241017-d36ba3989ca9-269125
[ ID] Interval Transfer Bandwidth
[ 1] 0.00-60.02 sec 5.16 GBytes 738 Mbits/sec
3. n269252-e18ba5c5555a
after patches applied and reboot
[ ID] Interval Transfer Bandwidth
[ 1] 0.00-60.01 sec 4.87 GBytes 697 Mbits/sec
[a] iperf method from earlier emails
iperf -B 192.168.1.13 -c 192.168.1.232 -l 1M -t 30 -i 2 -e ; netstat -nCRp tcp |
egrep "Active|Proto|5001"
------------------------------------------------------------
Client connecting to 192.168.1.232, TCP port 5001 with pid 16360 (1/0
flows/load)
Write buffer size: 1048576 Byte
TCP congestion control using cubic
TOS defaults to 0x0 (dscp=0,ecn=0) (Nagle on)
TCP window size: 32.8 KByte (default)
------------------------------------------------------------
[ 1] local 192.168.1.13%vtnet0 port 42853 connected with 192.168.1.232 port
5001 (sock=3) on 2024-10-21 19:17:24.491 (BST)
[ ID] Interval Transfer Bandwidth Write/Err
[ 1] 0.00-2.00 sec 151 MBytes 633 Mbits/sec 151/0
[ 1] 2.00-4.00 sec 159 MBytes 667 Mbits/sec 159/0
[ 1] 4.00-6.00 sec 148 MBytes 621 Mbits/sec 148/0
[ 1] 6.00-8.00 sec 200 MBytes 839 Mbits/sec 200/0
[ 1] 8.00-10.00 sec 197 MBytes 826 Mbits/sec 197/0
[ 1] 10.00-12.00 sec 182 MBytes 763 Mbits/sec 182/0
[ 1] 12.00-14.00 sec 195 MBytes 818 Mbits/sec 195/0
[ 1] 14.00-16.00 sec 175 MBytes 734 Mbits/sec 175/0
[ 1] 16.00-18.00 sec 133 MBytes 558 Mbits/sec 133/0
[ 1] 18.00-20.00 sec 127 MBytes 533 Mbits/sec 127/0
[ 1] 20.00-22.00 sec 201 MBytes 843 Mbits/sec 201/0
[ 1] 22.00-24.00 sec 194 MBytes 814 Mbits/sec 194/0
[ 1] 24.00-26.00 sec 199 MBytes 835 Mbits/sec 199/0
[ 1] 26.00-28.00 sec 171 MBytes 717 Mbits/sec 171/0
[ 1] 28.00-30.00 sec 189 MBytes 793 Mbits/sec 189/0
[ 1] 0.00-30.00 sec 2.56 GBytes 733 Mbits/sec 2622/0
Active Internet connections
Proto Recv-Q Send-Q Local Address Foreign Address flowid
ftype CC cwin ssthresh MSS ECN
tcp4 0 0 192.168.1.13.42853 192.168.1.232.5001 00000000
63 cubic 1721802 891968 1460 off
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