> I experience a lot of hardware interrupts with a BCM5751 PCI-express NIC
> (tg3). modprobe tg3, ifconfig ethX up and friends makes the system
> unresponsive. Just having the interface up makes the system sluggish.
>
> Onboard forcedeth works fine (with the same cable).
>
> iperf gives me just 2Mbps on a 1Gbps ethernet. Load average near 1.0. top
> reports 40-50%hi (hardware interrupts) when generating traffic over that
> interface.
>
> The system is a Supermicro H8SMI-2 motherboard, HP EA833AA BROADCOM
> NETXTREME PCI-express NIC, 2GB RAM, Dual-Core opteron 2.8GHz.
>
> All of our other servers with broadcom NIC's work fine with tg3, but they
> aren't PCI-express.
>
> I have tried booting with pci=nomsi and pci=routeirq (BIOS with or without
> "pnp OS" defined). Ubuntu 7.10 live-cd same result. Haven't tried other
> OS'es.
>
> irq_balancing enabled.
>
> Kernel conf:
http://www.iki.fi/~harald/kernconf.gz (9kB).
>
> Any hints on what to check for? Hardware or tg3 driverproblem?
>
>
> I would be glad to report more info, if needed. I have profiling support
> but I have never profiled a kernel before. I haven't got any other PCI-e
> NIC's to test with, yet.
>
>
> # uname -r
> 2.6.24.4
>
> # dmesg|grep tg
> tg3.c:v3.86 (November 9, 2007)
>
> # lspci -vvv
> 07:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5751 Gigabit Ethernet PCI Express (rev 21)
> Subsystem: Broadcom Corporation NetXtreme BCM5751 Gigabit Ethernet PCI Express
> Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
> Latency: 0, Cache Line Size: 64 bytes
> Interrupt: pin A routed to IRQ 216
> Region 0: Memory at febf0000 (64-bit, non-prefetchable) [size=64K]
> Expansion ROM at febe0000 [disabled] [size=64K]
> Capabilities: [48] Power Management version 2
> Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold+)
> Status: D0 PME-Enable+ DSel=0 DScale=1 PME-
> Capabilities: [50] Vital Product Data
> Capabilities: [58] Message Signalled Interrupts: Mask- 64bit+ Queue=0/3 Enable+
> Address: 00000000fee0300c Data: 4142
> Capabilities: [d0] Express Endpoint IRQ 0
> Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag+
> Device: Latency L0s <4us, L1 unlimited
> Device: AtnBtn- AtnInd- PwrInd-
> Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported-
> Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
> Device: MaxPayload 128 bytes, MaxReadReq 4096 bytes
> Link: Supported Speed 2.5Gb/s, Width x1, ASPM L0s L1, Port 0
> Link: Latency L0s <4us, L1 <64us
> Link: ASPM L0s L1 Enabled RCB 64 bytes CommClk+ ExtSynch-
> Link: Speed 2.5Gb/s, Width x1
>
>
> --
> A: Top Posters! | s/y Charlotta |
> Q: What is the most annoying thing on mailing lists? | FIN-2674 |
>
http://www.fe83.org/ Finn Express Purjehtijat ry | ============= |
> Harald H Hannelius | harald (At) iki (dot) fi | GSM +358 50 594 1020
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