Messages in this thread | | | Date | Sat, 02 May 1998 23:46:59 +0000 | From | Ove Ewerlid <> | Subject | Saturates 100 Mb/s channel (Was: Re: kernel performance degradation.) |
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C. Scott Ananian wrote:
> Any volunteers? Any previous benchmark results to report?
Just a little note that 2.1.99, is the first kernel that (I) have been able to saturate a 100 Mb/s ethernet using this method:
4 machines attached to a 3com superstack 3300.
Machine A: PPro-200 Mhz; 3c905 fullduplex
Machine B/C/D: P133/P166/PPro200 3c59x half/full duplex
B: rsh A "cat /dev/zero" > /dev/null C: rsh A "cat /dev/zero" > /dev/null D: rsh A "cat /dev/zero" > /dev/null
Surfing in on the Superstack 3300 to check the port of machine A reveals that 100% of the bandwidth is used. B/C/D is getting roughly 3.8-4.0 Mbytes/s.
It is possible to login to machine A and run a matlab benchmark. There is still 30 % CPU left for that.
However, there sometimes seems to be short (2-3 s) of loss of network connectivity from host A.
Before 2.1.99 this setup would be hopelessly jerky and A would not be able to come higher then 6-7 Mbytes/s. Your mileage may vary!
Ove
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