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Casey Callendrello wrote: > I've always liked iperf. It has lots of configurable options, like TCP > window size, packet length, and whether or not to do a bi-directional > test. Plus, it's free in every sense of the word. > > http://dast.nlanr.net/Projects/Iperf/ Ah, but that's fundamentally different, in that it's adding traffic to see what capacity is, whereas the things I was suggesting (and I think what the OP was asking about) measures what's already going over the interface. > On Nov 7, 2007, at 10:11 PM, Matthew Gillen wrote: > >> John Chambers wrote: >>> Something that turned out to be surprisingly difficult to find: How >>> does one learn the actual data rate (in Bytes) of a linux network >>> interface? >>> >>> There are lots of tools that give the packet rate, starting with good >>> old "netstat -i". It's interesting and useful info. But what I'm >>> trying to find is the total byte (or byte/sec) throughput of some >>> interfaces. I know it's gotta be there somewhere, probably in one of >>> those directories under /proc, but I don't seem to be guessing the >>> right keywords to find it. >>> >>> Anyone know off the top of their head? >> >> I like iptraf (choose "General interface stats") from >> http://iptraf.seul.org/ as a text-mode network monitor. I think the >> issue >> is that the number isn't directly in /proc, but rather there are some >> things >> in /proc that you could use to calculate it (ie the Tx/Rx 'bytes' >> fields of >> /proc/net/dev). Have fun with the parsing ;-) >> >> You could also run 'ifconfig' and parse the output of that >> periodically (the >> last line for each interface has tx/rx bytes) >> >>> I've considered using tcpdump, but that seems like a huge cpu load to >>> get data that's probably just lying about somewhere ... >> >> Yea, that's way overkill. >> >> Matt >> >> -- >> This message has been scanned for viruses and >> dangerous content by MailScanner, and is >> believed to be clean. >> >> _______________________________________________ >> Discuss mailing list >> [hidden email] >> http://lists.blu.org/mailman/listinfo/discuss > >
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