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Wed, 22 Oct 2025 10:53:17 -0400 (EDT) Date: Wed, 22 Oct 2025 15:53:15 +0100 From: void To: freebsd-net@freebsd.org Subject: Re: vtnet is still slow Message-ID: References: <649d06b9-17d7-4d67-a2d0-bb53c76b62fe@codenetworks.net> List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <649d06b9-17d7-4d67-a2d0-bb53c76b62fe@codenetworks.net> X-Spamd-Bar: --- X-Spamd-Result: default: False [-3.60 / 15.00]; NEURAL_HAM_SHORT(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-0.999]; MID_RHS_NOT_FQDN(0.50)[]; DMARC_POLICY_ALLOW(-0.50)[f-m.fm,none]; R_DKIM_ALLOW(-0.20)[f-m.fm:s=fm2,messagingengine.com:s=fm2]; R_SPF_ALLOW(-0.20)[+ip4:202.12.124.128/27:c]; MIME_GOOD(-0.10)[text/plain]; RCVD_IN_DNSWL_LOW(-0.10)[202.12.124.157:from]; FREEMAIL_FROM(0.00)[f-m.fm]; RCVD_TLS_LAST(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_COUNT_THREE(0.00)[3]; RCPT_COUNT_ONE(0.00)[1]; ARC_NA(0.00)[]; FROM_HAS_DN(0.00)[]; FREEMAIL_ENVFROM(0.00)[f-m.fm]; PREVIOUSLY_DELIVERED(0.00)[freebsd-net@freebsd.org]; TO_DN_NONE(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; DKIM_TRACE(0.00)[f-m.fm:+,messagingengine.com:+]; MLMMJ_DEST(0.00)[freebsd-net@freebsd.org]; ASN(0.00)[asn:151847, ipnet:202.12.124.0/24, country:AU]; RCVD_VIA_SMTP_AUTH(0.00)[]; MISSING_XM_UA(0.00)[]; DWL_DNSWL_NONE(0.00)[messagingengine.com:dkim] X-Rspamd-Queue-Id: 4csBxC1SC4z3CjQ On Wed, Oct 22, 2025 at 04:35:15PM +0200, Santiago Martinez wrote: >Hi there, how does the topology looks? iperf3 target is a desktop running stable/14. Its interface is em0 and its ip is 192.168.1.232 iperf3 bhyve guests (clients) as described in the previous email. The baremetal server is also a 'client' in this iperf3 context but its interface is bxe0 not vtnet0. The network 1GB all connected via 1GB switch. The command used on the clients was iperf3 --time 60 -c 192.168.1.232 Using your command switches in place of the one I used, I get [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-5.03 sec 254 MBytes 423 Mbits/sec 0 sender [ 5] 0.00-5.03 sec 254 MBytes 423 Mbits/sec receiver from stable/14 client --