Hi, On Fri, Oct 7, 2011 at 4:12 PM, Mike Tancsa <m...@sentex.net> wrote: > 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 > I'd assume that `em0' is not a 82574, whereas `em1' is.
- Arnaud > 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, m...@sentex.net > Providing Internet services since 1994 www.sentex.net > Cambridge, Ontario Canada http://www.tancsa.com/ > _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
