Subject: RE: [jade-develop] Question about JADE/LEAP performance.
From: Bellifemine Fabio (Fabio.Bellifemine@TILAB.COM)
Date: Wed Aug 21 2002 - 16:58:52 MET DST
Florent, LEAP does change the transport mechanism infact.
The paper you mention reports the results for JADE 2.5. Evaluating the results for JADE-LEAP is very important but remind to take appropriate care in understanding what happens, e.g. disabling just-in-time compilation can already be a cause of the problem or using a busy or unreliable network (i.e. several retransmission for the same packeg) can be another or the LEAP protocol can also be or also the CPU power of the iPaq.
If you were interested into using some of your time-resources for implementing a similar benchmark in the JADE-LEAP environment let me know such that someone in the JADE Team can try to help you in the execution of the experiments and analysis of the results.
Kind regards, Fabio.
-----Original Message-----
From: zze-PRIME Florent FTRD/DIH/LAN [mailto:florent.prime@rd.francetelecom.com]
Sent: 21 August 2002 15:59
To: jade-develop@sharon.cselt.it; leap-info@crm.mot.com
Subject: [jade-develop] Question about JADE/LEAP performance.
Hi jaders,
I have tried the benchmark addon for JADE, with JADE-LEAP 2.5 and java 1.3.1.03 (without just-in-time compilation). I have run it on a PIII 933 HP Kayak with 100 Mbits ethernet card. When I run the bench with one Jade platform, one host, and one or two JVM, the results I have obtained are very close to the results of the paper "Scalability and performance of JADE Message Transport System". But when I try to run the bench between two hosts, unfortunaly without a proper network for my two hosts, my results (average RTT) are higher, with a 20 factor !!! For example, with 2 hosts, only 15 couples and 1000 messages are exchanged by each couple, my average RTT is 6569 ms ! It should be around 300 ms according to the same paper. I know my network is not dedicated to my test, but the difference is too important. Is LEAP changing the transport mechanism ? I have exactly the same average RTT between my PC and an iPAQ running Jeode VM with 10 Mbits ethernet card ! Does anybody know why ?
Thank you very much for your help.
Florent
-----Original Message-----
From: zze-PRIME Florent FTRD/DIH/LAN [mailto:florent.prime@rd.francetelecom.com]
Sent: 21 August 2002 15:59
To: jade-develop@sharon.cselt.it; leap-info@crm.mot.com
Subject: [jade-develop] Question about JADE/LEAP performance.Hi jaders,
I have tried the benchmark addon for JADE, with JADE-LEAP 2.5 and java 1.3.1.03 (without just-in-time compilation). I have run it on a PIII 933 HP Kayak with 100 Mbits ethernet card. When I run the bench with one Jade platform, one host, and one or two JVM, the results I have obtained are very close to the results of the paper "Scalability and performance of JADE Message Transport System". But when I try to run the bench between two hosts, unfortunaly without a proper network for my two hosts, my results (average RTT) are higher, with a 20 factor !!! For example, with 2 hosts, only 15 couples and 1000 messages are exchanged by each couple, my average RTT is 6569 ms ! It should be around 300 ms according to the same paper. I know my network is not dedicated to my test, but the difference is too important. Is LEAP changing the transport mechanism ? I have exactly the same average RTT between my PC and an iPAQ running Jeode VM with 10 Mbits ethernet card ! Does anybody know why ?
Thank you very much for your help.
Florent
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