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

George Schlossnagle george at omniti.com
Thu Jun 27 09:33:22 EDT 2002


Yair will ask you for a couple loops of output from the monitor program, 
but can you also send your spread.conf file over, as well as netstat -rn 
output from your hosts?

Best,

George

On Thursday, June 27, 2002, at 09:03 AM, Jan Rickes wrote:

> 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
> }
>
>
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>
// George Schlossnagle
// Principal Consultant
// OmniTI, Inc          http://www.omniti.com
// (c) 301.343.6422   (e) george at omniti.com
// 1024D/1100A5A0  1370 F70A 9365 96C9 2F5E 56C2 B2B9 262F 1100 A5A0






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