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Mon, 14 Apr 2025 08:58:11 -0400 (EDT) Date: Mon, 14 Apr 2025 14:58:09 +0200 From: Marek =?utf-8?Q?Marczykowski-G=C3=B3recki?= To: "Lifshits, Vitaly" Cc: Jesse Brandeburg , Tony Nguyen , netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, regressions@lists.linux.dev, stable@vger.kernel.org, Sasha Levin Subject: Re: [REGRESSION] e1000e heavy packet loss on Meteor Lake - 6.14.2 Message-ID: References: Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="3dtuJQ5HLXloIV6T" Content-Disposition: inline In-Reply-To: --3dtuJQ5HLXloIV6T Content-Type: text/plain; protected-headers=v1; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Date: Mon, 14 Apr 2025 14:58:09 +0200 From: Marek =?utf-8?Q?Marczykowski-G=C3=B3recki?= To: "Lifshits, Vitaly" Cc: Jesse Brandeburg , Tony Nguyen , netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, regressions@lists.linux.dev, stable@vger.kernel.org, Sasha Levin Subject: Re: [REGRESSION] e1000e heavy packet loss on Meteor Lake - 6.14.2 On Mon, Apr 14, 2025 at 03:38:39PM +0300, Lifshits, Vitaly wrote: > Do you see the high packet loss without the virtualization? I can't check that easily right now, will try later. > Can you please share the lspci output? Sure: 00:07.0 Ethernet controller [0200]: Intel Corporation Device [8086:550a] (r= ev 20) Subsystem: CLEVO/KAPOK Computer Device [1558:a743] Physical Slot: 7 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Steppi= ng- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=3Dfast >TAbort- SERR- Does your switch/link partner support flow control? if it is configurable > can you try to enable it? It does support it. Enabling it makes things much worse... > Do you see any errors in dmesg related to the e1000e driver? Not really. dmesg | grep 'e1000e\|ens7': [ 3.088489] e1000e: Intel(R) PRO/1000 Network Driver [ 3.088512] e1000e: Copyright(c) 1999 - 2015 Intel Corporation. [ 3.093256] e1000e 0000:00:07.0: Interrupt Throttling Rate (ints/sec) se= t to dynamic conservative mode [ 3.343378] e1000e 0000:00:07.0 0000:00:07.0 (uninitialized): registered= PHC clock [ 3.718946] e1000e 0000:00:07.0 eth0: (PCI Express:2.5GT/s:Width x1) d4:= 93:90:3e:0d:bb [ 3.718966] e1000e 0000:00:07.0 eth0: Intel(R) PRO/1000 Network Connecti= on [ 3.719101] e1000e 0000:00:07.0 eth0: MAC: 16, PHY: 12, PBA No: FFFFFF-0= FF [ 3.759444] e1000e 0000:00:07.0 ens7: renamed from eth0 [ 8.632317] e1000e 0000:00:07.0 ens7: NIC Link is Up 1000 Mbps Full Dupl= ex, Flow Control: None [ 239.458205] e1000e 0000:00:07.0 ens7: NIC Link is Down [ 242.485869] e1000e 0000:00:07.0 ens7: NIC Link is Up 1000 Mbps Full Dupl= ex, Flow Control: Rx/Tx (you can also see a test with flow control above) And also ethtool output if useful: Settings for ens7: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: Symmetric Receive-only Supports auto-negotiation: Yes Supported FEC modes: Not reported Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: Symmetric Receive-only Advertised auto-negotiation: Yes Advertised FEC modes: Not reported Link partner advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Link partner advertised pause frame use: No Link partner advertised auto-negotiation: Yes Link partner advertised FEC modes: Not reported Speed: 1000Mb/s Duplex: Full Auto-negotiation: on Port: Twisted Pair PHYAD: 1 Transceiver: internal MDI-X: on (auto) Supports Wake-on: d Wake-on: d Current message level: 0x00000007 (7) drv probe link Link detected: yes --=20 Best Regards, Marek Marczykowski-G=C3=B3recki Invisible Things Lab --3dtuJQ5HLXloIV6T Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhrpukzGPukRmQqkK24/THMrX1ywFAmf9BmEACgkQ24/THMrX 1ywZZQf/VzpE9UiEUa/4GQjlzqL4ic3Lfu4aN6g4RuEVdM9dIGS1ZsNSg6r5Z9Vj qxmm/J7h6i+ma685KIK62ZaFKmK29sTYh0dq0oI0TldQeWj5g9BHKmbMJevXJdKJ F/zdOAqnaY7U2iT3nVQ5I38dwgCwrPH7WYruF582LgFeFIgvcA23ya4EmGqIVolX Uu/JeU3MICCM3HvEv3VvFpWSGHGVSdpc4WnCr6KoywLVwz2QCO49GmNDcykRwkjL NbEdi9/1N7W6i1+J1ISUqrv6dLAJvpYyK3HP7bovdFjs01BQ5lXKmsX0Gn7SYa89 LuB2k2oNOpoLJgFxcjrIkGzfX/8dRA== =+RlG -----END PGP SIGNATURE----- --3dtuJQ5HLXloIV6T--