Re: strange guest slowness after some time

[Felix Leimbach <felix.leimbach@gmx.net>]

Avi,

Avi Kivity wrote:
> packet counters are will within 32-bit limits.  byte counters not so 
> interesting.
This night my test overflowed the *packet* counters twice without any 
slowness or loss of connectivity.

Snippet from my log file of the sending VM (linux 2.6.27):

Wed Mar 18 05:14:18 CET 2009: TX packet counter = 4292944043
Wed Mar 18 05:15:18 CET 2009: TX packet counter = 6259211

ifconfig after stress test:
# ifconfig
eth0      Link encap:Ethernet  HWaddr 52:54:00:74:01:01
          inet addr:10.75.13.1  Bcast:10.75.255.255  Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:150  Metric:1
          RX packets:48950340 errors:0 dropped:0 overruns:0 frame:0
          TX packets:727911367 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:3686511201 (3.4 GiB)  TX bytes:4207842269 (3.9 GiB)

I didn't create a log file on the receiving Windows VM but they must 
have overflowed as well. Its packet counters are currently:
Sent: 47.112.780
Received: 1.515.275.693

No problem on the Windows guest either.

So the problem must lie elsewhere.