Update : By using iperf to check multicast performance, iperf also give a bad result(100Mbit/sec) on my virtual machine, but CPU usage is very low(only 1%). The command I used is :
iperf -c 239.255.1.10 -u -l 8K -b 1G -w -i 5 -t 300 -T 4
On Jan 9, 2013 1:57 PM, "jason" <huzhijiang@xxxxxxxxx> wrote:
Hi Jan,
Between our two virtual machines, iperf -i 1 -w 1M can reach line rate that is 1.00 Gbit/sec. But I do not know why cpgbench only got 10 MB/s. And when cpgbench was running, top showed it used up almost one CPU. 30% in usermode, 70% for in kernel mode.
On Dec 10, 2012 3:28 PM, "Jan Friesse" <jfriesse@xxxxxxxxxx> wrote:Jason,
jason napsal(a):
> Hi All,
> Currently we created a 16 nodes(virtuallization) cluser environment to test
cool
> the performance of the Totem protocol. We wan to see the relationship
> between the cluster size(the amount of nodes ) and the bandwidth/latency.
After you will finish testing, can you please share results?
> And I found there are already some test utilities that I can use such as
> cpgbench, evtbench and pload and I want to know which tool is the best
> that I should use to meet my requirement and is there any other way to test
Question is, what type of performance you would like to test. Is that
bandwidth, or latency? Network or local one? cpgbench seems to be
generally best for testing both bandwidth (with big messages) and
latency (with small messages). I would not recommend pload, because this
makes corosync to behave weird (it's almost removed in 2.x).
Honza
> such performance?
>
>
>
>
> _______________________________________________
> discuss mailing list
> discuss@xxxxxxxxxxxx
> http://lists.corosync.org/mailman/listinfo/discuss
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