On 1/26/2013 12:06 PM, Geoff Nordli wrote:
> On 13-01-26 10:58 AM, Daniel L. Miller wrote:
>> I have a Linux (Ubuntu Precise 64) host with both Windows and Linux
>> guests.  I've been noticing some poor network performance from the Linux
>> guests - I just did a quick test.
>>
>> The guests are configured with bridged networking, using the
>> paravirtualized network adapter.  Guest additions are running.
>>
>> Pinging the host adapater on the host is an average 0.066 ms
>> Pinging a Windows guest from the host is an average 0.380 ms
>> Pinging a Linux guest from the host is an average 7.526 ms
>>
>> I get the same results from two different Linux guests, one 32-bit and
>> one 64-bit.
>>
>> The 32-bit is a fresh install, so unless something is broken in the
>> Ubuntu Precise defaults I didn't do it.  Why am I getting such poor
>> networking performance from the Linux guests?
>>
> This doesn't fit the profile exactly, but it may have something to do
> with the tcp offloading issues.
>
> What happens if you ping an ip address not on the host from the linux
> guest?  Like a remote gateway or something.
>
Now I'm more confused than ever.

Pinging both my remote gateway (cable modem) and google, Windows guests 
and the Linux host are the same.  Linux guest is slower - and it's using 
the Intel adapter now.

-- 
Daniel


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