From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesper Dangaard Brouer Subject: Re: Kernel 4.19 network performance - forwarding/routing normal users traffic Date: Sat, 10 Nov 2018 22:01:31 +0100 Message-ID: <20181110220131.655f7cc0@redhat.com> References: <61697e49-e839-befc-8330-fc00187c48ee@itcare.pl> <659fbf4b481c815f45a58b2351481cc9f761445b.camel@mellanox.com> <6486d01d-7a50-33c4-e27f-4ace8aa8e150@itcare.pl> <920c2665-781f-5f62-efbe-347e63063a24@itcare.pl> <162e25c6-dae2-7e1e-75f0-9c5b22453495@itcare.pl> <20181110203409.482f39ec@redhat.com> <5d44e0d9-d8d3-1b07-5392-838e4096ca74@itcare.pl> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Cc: Saeed Mahameed , "netdev@vger.kernel.org" , brouer@redhat.com To: =?UTF-8?B?UGF3ZcWC?= Staszewski Return-path: Received: from mx1.redhat.com ([209.132.183.28]:59284 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725772AbeKKGr4 (ORCPT ); Sun, 11 Nov 2018 01:47:56 -0500 In-Reply-To: <5d44e0d9-d8d3-1b07-5392-838e4096ca74@itcare.pl> Sender: netdev-owner@vger.kernel.org List-ID: On Sat, 10 Nov 2018 21:02:10 +0100 Paweł Staszewski wrote: > W dniu 10.11.2018 o 20:34, Jesper Dangaard Brouer pisze: > > I want you to experiment with: > > > > ethtool --set-priv-flags DEVICE rx_striding_rq off > > just checked that previously connectx4 was have thos disabled: >  ethtool --show-priv-flags enp175s0f0 > > Private flags for enp175s0f0: > rx_cqe_moder       : on > tx_cqe_moder       : off > rx_cqe_compress    : off > rx_striding_rq     : off > rx_no_csum_complete: off > The CX4 hardware does not have this feature (p.s. the CX4-Lx does). > So now we are on connectx5 and we have enabled - for sure connectx5 > changed cpu load - where i have now max 50/60% cpu where with connectx4 > there was sometimes near 100% with same configuration. I (strongly) believe the CPU load was related to the page-alloactor lock congestion, that Aaron fixed. -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer