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<TITLE> [Mono-bugs] [Bug 606228] Very bad performance of async socket application specifically under Mono/Linux (Notifications: epoll)
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<H1>[Mono-bugs] [Bug 606228] Very bad performance of async socket application specifically under Mono/Linux (Notifications: epoll)</H1>
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<B>bugzilla_noreply at novell.com</B>
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<A HREF="mailto:mono-bugs%40lists.ximian.com?Subject=%5BMono-bugs%5D%20%5BBug%20606228%5D%20Very%20bad%20performance%20of%20async%20socket%0A%20application%20specifically%20under%20Mono/Linux%20%28Notifications%3A%20epoll%29&In-Reply-To=bug-606228-28286%40http.bugzilla.novell.com/"
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TITLE="[Mono-bugs] [Bug 606228] Very bad performance of async socket application specifically under Mono/Linux (Notifications: epoll)">bugzilla_noreply at novell.com
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<I>Fri Jul 2 22:27:46 EDT 2010</I>
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<PRE><A HREF="http://bugzilla.novell.com/show_bug.cgi?id=606228">http://bugzilla.novell.com/show_bug.cgi?id=606228</A>
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<A HREF="http://bugzilla.novell.com/show_bug.cgi?id=606228#c3">http://bugzilla.novell.com/show_bug.cgi?id=606228#c3</A>
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--- Comment #3 from Rickard Edström <<A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">ickard at gmail.com</A>> 2010-07-03 02:27:45 UTC ---
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I have investigated this a bit further, and I've come to the conclusion that it
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is not related to async I/O at all.
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I now have a very simple C# synchronous I/O application which is able to send
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(as before) 180ish requests. (It also runs fast on Windows)
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The issue causing the performance problems in both apps seems to be that I'm
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sending a message just after I sent one. If I instead use the
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alternative[commented] implementation of Write() in the code linked, it works
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very fast under linux as well.
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Maybe this is intended behaviour for sockets on linux, or it could possibly be
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a mono bug? Anyways, the original description for this bug apparently is
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inaccurate as it stands.
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The very simple app: <A HREF="http://pastie.org/1028955">http://pastie.org/1028955</A>
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