Date: Fri, 07 Oct 2011 16:12:24 -0400 From: Mike Tancsa <mike@sentex.net> To: Arnaud Lacombe <lacombar@gmail.com> Cc: freebsd-net@freebsd.org, Jason Wolfe <nitroboost@gmail.com> Subject: Re: Intel 82574L interface wedging on em 7.1.9/7.2.3 when MSIX enabled Message-ID: <4E8F5D28.2050109@sentex.net> In-Reply-To: <CACqU3MVwLaepFymZJkaVk6p=SpykGhqs=VYFjLh9fP9S=AxDhg@mail.gmail.com> References: <CAAAm0r0RXEJo4UiKS=Ui0e5OQTg6sg-xcYf3mYB5%2Bvk8i8557w@mail.gmail.com> <4E8F157A.40702@sentex.net> <CAAAm0r2JH43Rct7UxQK2duH1p43Nepnj5mpb6bXo==DPayhJLg@mail.gmail.com> <4E8F51D4.1060509@sentex.net> <CACqU3MVwLaepFymZJkaVk6p=SpykGhqs=VYFjLh9fP9S=AxDhg@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 10/7/2011 3:55 PM, Arnaud Lacombe wrote: >> When you disable MSI-X, you mean via hw.pci.enable_msix=0 across the >> board, or you disable multi-queue for the NIC, so it uses just one >> interrupt, rather than separate ones for xmit and recv ? >> > em(4)'s multiqueue is misleading. By default, with MSI-X enabled, > before AFAIK, April 2010 it used 2 (RX+TX) queue + 1, ie. 5 MSI-X > vectors[0]. After April 2010, it uses 1 * (RX+TX) queue + 1, ie. 3 > MSI-X vectors. There is no logic for the driver to use 1 vector with > MSI-X enabled. Hi, Very poor choice of wording on my part. I meant to say separate interrupts for the xmit and recv, as opposed to multiqueue which is quite different. On the server I used to see the issue with, it has 2 onboard NICs em0: <Intel(R) PRO/1000 Network Connection 7.2.3> port 0x4040-0x405f mem 0xb4500000-0xb451ffff,0xb4525000-0xb4525fff irq 16 at device 25.0 on pci0 em0: Using an MSI interrupt em0: [FILTER] em0: Ethernet address: 00:15:17:ed:68:a5 em1: <Intel(R) PRO/1000 Network Connection 7.2.3> port 0x2000-0x201f mem 0xb4100000-0xb411ffff,0xb4120000-0xb4123fff irq 16 at device 0.0 on pci11 em1: Using MSIX interrupts with 3 vectors em1: [ITHREAD] em1: [ITHREAD] em1: [ITHREAD] em1: Ethernet address: 00:15:17:ed:68:a4 irq257: em0 506496667 813 irq258: em1:rx 0 296438098 476 irq259: em1:tx 0 252033695 404 Actually, I see it in Jason's email now that I re-read it. hw.em.enable_msix="0" However, with 7.1.9 this setting did not help me. ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4E8F5D28.2050109>