Date: Thu, 20 Nov 2025 23:22:36 +0000 From: void <void@f-m.fm> To: freebsd-net@freebsd.org Subject: Re: vtnet is much improved in 16:current (nodebug) Message-ID: <aR-ivPONHgOn0ygt@int21h> In-Reply-To: <B72AE6BE-51B6-4DB2-90EC-AD30F1A72A02@freebsd.org> References: <aRNXLD7MX7eOIs64@int21h> <B72AE6BE-51B6-4DB2-90EC-AD30F1A72A02@freebsd.org>
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On Wed, Nov 19, 2025 at 11:24:01AM -0500, Cheng Cui wrote: >That's good news! :) I did some very general tests: first ones were one vm upgraded over several iterations. This vm being enc zfs mounted as a zvol on a raidz1 zpool (spinning rust). Nothing changed apart from the OS version The tl;dr is that 16.0-CURRENT ufs2 nodebug kernel & userland is the clear winner in terms of throughput; it is almost equal (941 Mbits/sec) to line level. freebsd 14.3-p3 =============== iperf3 -B 192.168.1.121 -c 192.168.1.230 -l 1M -t 30 -i 2 ; netstat -nCRp tcp | egrep "Active|Proto|5201" - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.01 sec 1.38 GBytes 396 Mbits/sec 0 sender [ 5] 0.00-30.01 sec 1.38 GBytes 396 Mbits/sec receiver stable/15-n281161-fc22812b6685 [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.03 sec 1.57 GBytes 450 Mbits/sec 0 sender [ 5] 0.00-30.03 sec 1.57 GBytes 450 Mbits/sec receiver 16.0-CURRENT - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.13 sec 1.77 GBytes 506 Mbits/sec 0 sender [ 5] 0.00-30.13 sec 1.77 GBytes 506 Mbits/sec receiver ==================================================== These next few tests exploring differences whether vm on zpool host was ufs backed, zfs backed, zvol backed or zvol with compression whether these factors influenced throughput. all 16.0-current 16.0-CURRENT ufs2 nodebug kernel & userland - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.05 sec 3.28 GBytes 939 Mbits/sec 0 sender [ 5] 0.00-30.05 sec 3.28 GBytes 938 Mbits/sec receiver 16-current ufs2 installed the new way - debug kernel & userland - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.07 sec 1.88 GBytes 537 Mbits/sec 0 sender [ 5] 0.00-30.09 sec 1.88 GBytes 537 Mbits/sec receiver as above, -rxcsum -txcsum -tso -tso6 -lro - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.16 sec 1.46 GBytes 417 Mbits/sec 0 sender [ 5] 0.00-30.15 sec 1.46 GBytes 417 Mbits/sec receiver as above, nodebug kernel - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.13 sec 3.01 GBytes 858 Mbits/sec 0 sender [ 5] 0.00-30.15 sec 3.01 GBytes 858 Mbits/sec receiver as above, nodebug kernel & world - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.01 sec 3.08 GBytes 881 Mbits/sec 0 sender [ 5] 0.00-30.02 sec 3.08 GBytes 881 Mbits/sec receiver 16-current installed the traditional way - zfs & debug kernel - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.03 sec 2.70 GBytes 772 Mbits/sec 0 sender [ 5] 0.00-30.03 sec 2.70 GBytes 771 Mbits/sec receiver as above, -rxcsum -txcsum -tso -tso6 -lro - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.05 sec 2.68 GBytes 765 Mbits/sec 0 sender [ 5] 0.00-30.05 sec 2.68 GBytes 765 Mbits/sec receiver as above, nodebug kernel - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.02 sec 2.92 GBytes 835 Mbits/sec 0 sender [ 5] 0.00-30.03 sec 2.92 GBytes 835 Mbits/sec receiver as above, nodebug kernel & userland - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.04 sec 2.96 GBytes 846 Mbits/sec 0 sender [ 5] 0.00-30.04 sec 2.96 GBytes 846 Mbits/sec receiver 16-current installed the traditional way - zfs & debug kernel - fileimage, encrypted zfs - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.04 sec 1.90 GBytes 544 Mbits/sec 0 sender [ 5] 0.00-30.04 sec 1.90 GBytes 544 Mbits/sec receiver as above, -rxcsum -txcsum -tso -tso6 -lro - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.11 sec 1.79 GBytes 510 Mbits/sec 0 sender [ 5] 0.00-30.12 sec 1.79 GBytes 509 Mbits/sec receiver nodebug kernel -rxcsum -txcsum -tso -tso6 -lro - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.01 sec 2.89 GBytes 826 Mbits/sec 0 sender [ 5] 0.00-30.02 sec 2.89 GBytes 826 Mbits/sec receiver as above, offloading enabled - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.01 sec 2.88 GBytes 824 Mbits/sec 0 sender [ 5] 0.00-30.02 sec 2.88 GBytes 824 Mbits/sec receiver nodebug enccrypted on zvol - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.09 sec 1.86 GBytes 530 Mbits/sec 0 sender [ 5] 0.00-30.10 sec 1.86 GBytes 530 Mbits/sec receiver as above, -rxcsum -txcsum -tso -tso6 -lro - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.08 sec 1.60 GBytes 456 Mbits/sec 0 sender [ 5] 0.00-30.08 sec 1.60 GBytes 456 Mbits/sec receiver as above, offloading enabled - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-30.02 sec 2.26 GBytes 646 Mbits/sec 0 sender [ 5] 0.00-30.03 sec 2.26 GBytes 646 Mbits/sec receiver --
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