netdev - Re: TX on r8169 causes latency and messes up real-time apps, on some boards

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Message-ID: <cb0375e10908162231n26da814ep75d70d68409bb112@mail.gmail.com>
Date:	Mon, 17 Aug 2009 01:31:02 -0400
From:	Andrew Lutomirski <luto@....edu>
To:	Francois Romieu <romieu@...zoreil.com>
Cc:	netdev@...r.kernel.org
Subject: Re: TX on r8169 causes latency and messes up real-time apps, on some 
	boards

This might be a false alarm -- it's possible I'm just trying to exceed
available PCI bandwidth.  I'll email back if I find any more
convincing evidence it's a problem with r8169.

Thanks,
Andy

On Mon, Aug 17, 2009 at 1:19 AM, Francois Romieu<romieu@...zoreil.com> wrote:
> Andrew Lutomirski <luto@....edu> :
> [...]
>> @@ -125,6 +125,11 @@
>>  ACPI: No dock devices found.
>>  ACPI: PCI Root Bridge [PCI0] (0000:00)
>>  pci 0000:00:00.0: reg 10 32bit mmio: [0x48000000-0x49ffffff]
>> +pci 0000:00:02.7: reg 10 io port: [0x2200-0x22ff]
>> +pci 0000:00:02.7: reg 14 io port: [0x2300-0x237f]
>> +pci 0000:00:02.7: supports D1 D2
>> +pci 0000:00:02.7: PME# supported from D3hot D3cold
>> +pci 0000:00:02.7: PME# disabled
> [...]
>> @@ -157,34 +162,34 @@
>>  ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
>>  ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P1._PRT]
>>  ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 7 *10 11 12 14 15)
>> -ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 7 10 *11 12 14 15)
>> -ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 7 10 11 12 14 15) *0, disabled.
>> -ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 7 *10 11 12 14 15)
>> +ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 7 *10 11 12 14 15)
>> +ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 7 10 *11 12 14 15)
>> +ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 7 10 *11 12 14 15)
>
> There is some difference. Either the kernel, the board or the bios
> revision. I'd be surprized if the /proc/interrupts looked the same.
>
> --
> Ueimor
>
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