jimsalterjrs / network-testing Goto Github PK

I'm trying to use net-hydra to run iperf on a pool of clients all at the same time - my goal is to measure the impact of increasing the number of wifi clients on average request latency in a LAN.

My directives are all of the form clientId = $loadtest, and the loadtest directive is defined as:

$loadtest = "/usr/bin/iperf --trip-times -l 128 -b 51.2k,5k -t 30 -e -c 10.3.0.125 >> /tmp/symmetric-30-$when.log"

The actual load test runs fine, and the log file ~/symmetric-30-NNNNNNN.log gets created, but there's never any output captured in the actual log file. When I run the exact same command line locally on the individual test nodes, they do generate log files with the expected content. I'm not sure why it's not working when the command is run by net-hydra. Is it possibly related to daemonisation by whenits?

Wi-Fi uses "group addressed data frames" to convey Ethernet broadcast and multicast traffic and the IP traffic that uses these Ethernet frame types. Since IP network infrastructure protocols such as ARP, NDP, DHCP, mDNS, WS-Discovery and UPnP SSDP depend on these protocols frequently as a precursor to using unicast protocols, it seems to makes sense to include tools and heuristics to this suite that evaluate the performance of these protocol classes.

(As I'm not a Perl programmer and as I also have limited bandwidth, I don't have time to contribute something myself...)