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From: "Cliff Jansen (Interop Systems Inc)" <v-cljans@microsoft.com>
To: "users@qpid.apache.org" <users@qpid.apache.org>
CC: "ignacio_ybarra@hotmail.com" <ignacio_ybarra@hotmail.com>
Subject: RE: dotnet client 0.10 - performance
Thread-Topic: dotnet client 0.10 - performance
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Date: Mon, 14 Dec 2009 15:19:08 +0000
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References: 
 <151b38ac0912082027oe108d88mc4c316e3c72baae8@mail.gmail.com>,<f5f5e0730912090857o46495c85o6ad75e260e6a036b@mail.gmail.com>,<151b38ac0912091459v7ddb941dlb52512e76d0b692e@mail.gmail.com>,<151b38ac0912091503x5bad161fka208a66b3b84fd6@mail.gmail.com>,<8cf8f70b0912091508s69ffcd14m58bf2e2302fd07ca@mail.gmail.com>,<f5f5e0730912091518n48ffe7h5966dc9963e5af7b@mail.gmail.com>,<151b38ac0912091757g589ecdbasb39643722b933b19@mail.gmail.com>,<f5f5e0730912092059r623bd92au150e0d07e89fbd6c@mail.gmail.com>,<8cf8f70b0912092137q2bd5a98bs259d3813a0dff5d@mail.gmail.com>,<COL102-W1587F9B2E37F512DA56E59EF8D0@phx.gbl>
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Hi Ignacio,

If you are using durable messages, your test may be mainly measuring
the speed of the broker's message store on your hardware.

I have very little knowledge of the dotnet client, but using both the
qpid/wcf and qpid/cpp clients with a Linux broker give the following
numbers for 100 byte messages (using WcfPerftest and perftest
respectively):

  async:              66k msg/sec
  sync (not durable): 2.8k msg/sec
  sync (durable):     100 msg/sec

Which gives a similar amount of change between the first and third as
you are seeing.

My hardware consists of a couple of inexpensive desktops running
Windows (Client) and Fedora (broker) connected by a lowly 100Mbit/s
Ethernet switch.  The Linux broker's message store is in its default
configuration and "powered" by a single desktop 7200RPM drive.  I have
no doubt that with a little tuning and fancier storage hardware, the
durable number can be made to approach the non durable synchronous
number.

Cliff

-----Original Message-----
From: Ignacio Ybarra [mailto:ignacio_ybarra@hotmail.com]=20
Sent: Thursday, December 10, 2009 9:20 AM
To: users@qpid.apache.org
Subject: dotnet client 0.10 - performance


Hi - has anybody benchmarked the dotnet client 0.10?
I am finding that a single publisher thread only goes as fast as 24 msg/sec=
 (=3D41.6milliseconds/msg) when using this API in synchronous mode, i.e.=20
            session.MessageTransfer("hello.exchange", myMessage);          =
  session.Sync();
I am capturing the network traffic between the client and the broker and ca=
n see the message going to the broker (RHEL MRG) and coming back within ~2.=
1ms (implying a broker limitation of around 476msg/sec). The remaining time=
 seems to be spent in code, somewhere between
	org.apache.qpid.transport.network.IoReceiver.Go()
	and
	org.apache.qpid.transport.Session.Complete(...) {... Monitor.PulseAll(_com=
mands); ... }
which signals Session.Sync(...) { ... Monitor.Wait(_commands, (int)(timeout=
 - elapsed)); ... } on the same class.
The payload is insignificant in this case - we are testing with small messa=
ges.
Async mode gives me 28K msgs/sec but the nature of this test requires a syn=
c after each send.
Any help will be appreciated.=20
TIA=20
Ig


 		 	   		 =20

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