domU page faults under heavy network load

[Kip Macy]

Is this a recent version of HEAD? I'm not able to reproduce.

<...>
thru: 1947.346ms at   32.9MB/s (  27.8MB/s avg)    3.3GB
thru: 1946.356ms at   32.9MB/s (  27.9MB/s avg)    3.4GB
thru: 1946.910ms at   32.9MB/s (  27.9MB/s avg)    3.4GB
<...>

Maybe some variation in the options?

Thanks,
Kip

On Tue, Feb 10, 2009 at 11:40 AM, Kai Mosebach <kai at freshx.de> wrote:
> 1024meg
>
>
> On 2/10/09 8:30 PM, "Kip Macy" <kmacy at freebsd.org> wrote:
>
>> How big is the memory allocation to the VM?
>>
>> Thanks,
>> Kip
>>
>>
>> On Tue, Feb 10, 2009 at 7:59 AM, Kai Mosebach <xen at komadev.de> wrote:
>>> Hi,
>>>
>>> running r188436M on Xen3.3.1 (Centos5, x86_64). The reason is not to clear
>>> but seems related to heavy load on pipes + memory + network?
>>> It is repeatable with :
>>>
>>> bsd8# dd if=/dev/zero | nc otherhost 12345
>>>
>>> Fatal trap 12: page fault while in kernel mode
>>> cpuid = 0; apic id = 00
>>> fault virtual address   = 0xd216dd00
>>> fault code              = supervisor read, page not present
>>> instruction pointer     = 0x21:0xc02e4d40
>>> stack pointer           = 0x29:0xc332aba8
>>> frame pointer           = 0x29:0xc332abfc
>>> code segment            = base 0x0, limit 0xfffff, type 0x1b
>>>                        = DPL 1, pres 1, def32 1, gran 1
>>> processor eflags        = interrupt enabled, resume, IOPL = 0
>>> current process         = 12 (irq137: xn)
>>> [thread pid 12 tid 100025 ]
>>> Stopped at      xlvbd_add+0x2f70:       movl    0x900(%edx,%eax,4),%edx
>>> db> bt
>>> <console hangs>
>>>
>>>
>>> On otherhost i get some stuff (between 19 and 62 MB), after nc closes down
>>> eventually
>>>
>>> otherhost# nc -l 12345 | cpipe -vt -b 65535 >/dev/null
>>> ...
>>> thru: 108930.791ms at  184.3kB/s ( 184.3kB/s avg)   19.6MB
>>>
>>> best Kai
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>
>
>