Re: Intel Pro/1000 MT and strange ping RTTs

2006-02-15 Thread Mark Flocco
Any luck replicating this? Does anyone else have any ideas? --- Henrique de Moraes Holschuh <[EMAIL PROTECTED]> wrote: > On Sun, 12 Feb 2006, Mark Flocco wrote: > > session. However, during times of high traffic (~8Mbps), the RTTs > > 8Mbits/s or 8Mbytes/s ? Anyway neit

Re: Intel Pro/1000 MT and strange ping RTTs

2006-02-13 Thread Mark Flocco
> 8Mbits/s or 8Mbytes/s ? 8Mbits/s. That's at peak, as well. > > I wouldn't call that stress, unless your switch is really awful. I'm seeing this across two different switches - a Cisco 3550 and a Cisco 2912. I'm also seeing it in 100Mbps and 1000Mbps modes (2912 doesn't support Gbit) > an

Re: Intel Pro/1000 MT and strange ping RTTs

2006-02-12 Thread Mark Flocco
> And if you do that from a non e1000 host *to* an e1000 host? Same result - variable times. > > Also, do you have traffic in the e1000 other than the ping? Heavy > traffic? > Light traffic? Is NAPI enabled in the kernel? The ping I pasted was with zero other traffic other than an ssh sessio

Intel Pro/1000 MT and strange ping RTTs

2006-02-12 Thread Mark Flocco
I'm currently running Debian sarge with the e1000 driver on a few servers. I'm seeing variable round trip times when I send pings to any host from a host with the Intel Pro/1000 MT. Meaning, I don't have to ping between these hosts to get the variable RTTs. Comparitively, on two other servers wh