Messages in this thread | | | Date | Wed, 6 Feb 2002 23:37:57 -0500 (EST) | From | Ion Badulescu <> | Subject | Re: want opinions on possible glitch in 2.4 network error reporting |
| |
On Wed, 6 Feb 2002, Ben Greear wrote:
> >>From the limited testing I just ran, I appears that starfire and 3c59x > > handle this correctly, whereas tulip always loses a small number of > > packets during a UDP storm. ttcp -us[rt] is very useful for such > > testing... > > It would be interesting to see which side is dropping? Have you > coorelated ethernet driver counters to your sendto count?
It's hard for me to do it right now, because I don't have them in isolation (they do NFS and other stuff), and I don't have iptables support compiled into the kernel running the tulip. However:
starfire -> 3c59x 3c59x -> starfire tulip -> 3c59x tulip -> starfire
never lose data on a quiescent network:
ttcp-t: 83886080 bytes in 7.04 real seconds = 11640.36 KB/sec +++ ttcp-r: 83886080 bytes in 7.04 real seconds = 11641.10 KB/sec +++
whereas
3c59x -> tulip starfire -> tulip
*always* lose several packets:
ttcp-t: 16777216 bytes in 1.40 real seconds = 11717.40 KB/sec +++ ttcp-r: 16769024 bytes in 1.40 real seconds = 11679.39 KB/sec +++
and
ttcp-t: 33554432 bytes in 2.80 real seconds = 11714.81 KB/sec +++ ttcp-r: 33456128 bytes in 2.80 real seconds = 11660.28 KB/sec +++
and
ttcp-t: 83886080 bytes in 7.00 real seconds = 11704.40 KB/sec +++ ttcp-r: 83722240 bytes in 7.00 real seconds = 11674.67 KB/sec +++
So I would tend to blame it on the tulip -- but the Rx side of it, not the Tx, which this discussion was about...
Ion
-- It is better to keep your mouth shut and be thought a fool, than to open it and remove all doubt.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |