[Spread-users] spread's performance: solaris vs. linux

[Jan Rickes]

hello spread people,

i'm evaluating spread's performance (spread-src-3.16.2.tar)
and was encountering dramatic performance losts,
if there was any LINUX host in my segment.
does anyone have a clue what's the reason of this phenomenon?

as well i was testing Flooder.java and i've got several times this exception:

java.lang.NegativeArraySizeException
        at spread.SpreadConnection.internal_receive(SpreadConnection.java:1184)
        at spread.SpreadConnection.access$2(SpreadConnection.java)
        at spread.SpreadConnection$Listener.run(SpreadConnection.java:1652)

what's happening here?


any comments would be much appreciated :)
regards, jan

-------------------------------------------------------------------------------------
performance results:

** linux **
ren_linux> time ./spflooder -m 10000 -b 100000 -s 6824 -wo
flooder: connecting to 6824
flooder: starting  multicast of 10000 messages, 100000 bytes each (self discarding).
flooder: completed  10000 messages of 100000 bytes
flooder: completed multicast of 10000 messages, 100000 bytes each.
real    13m32.138s
user    0m0.080s
sys     0m6.320s

stimpy_linux> time ./spflooder -s 6824 -ro 
flooder: connecting to 6824
flooder: Only receiving messages
flooder: completed  10000 messages of 100000 bytes
flooder: completed multicast of 10000 messages, 1000 bytes each.
real    14m16.372s
user    0m0.130s
sys     0m6.200s


** solaris **
ren_solaris> time ./spflooder -m 10000 -b 100000 -s 6824 -wo   
flooder: connecting to 6824
flooder: starting  multicast of 10000 messages, 100000 bytes each (self discarding).
flooder: completed multicast of 10000 messages, 100000 bytes each.
real    2m12.567s
user    0m0.190s
sys     0m9.250s

stimpy_solaris> time ./spflooder -ro -s 6824
flooder: connecting to 6824
flooder: Only receiving messages
flooder: completed multicast of 10000 messages, 100000 bytes each.
real    2m19.112s
user    0m0.560s
sys     0m10.520s


ren_solaris:    SunOS 5.6 Generic_105181-20 sun4u sparc SUNW,UltraSPARC-IIi-Engine
stimpy_solaris: SunOS 5.8 Generic_108528-14 sun4u sparc SUNW,UltraAX-MP
ren_linux:      Linux 2.4.10-4GB #1 Tue Sep 25 12:33:54 GMT 2001 i686 unknown
stimpy_linux:   Linux 2.4.10-64GB-SMP #3 SMP Thu Dec 6 15:35:10 CET 2001 i686 unknown


Spread_Segment 224.100.100.224:6824 {
        ren_solaris     172.27.27.21
        stimpy_solaris  172.27.27.28
        ren_linux       172.27.27.19
        stimpy_linux    172.27.100.237
}