Message-Id: <200203141341.NAA008.76 at mail.eyup.org>
From: "Stepan Kazakov" <madded at mitm.ru>
To: "os2-unix at eyup.org" <os2-unix at eyup.org>
Date: Thu, 14 Mar 02 17:40:53 +0500
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Subject: Re: [UnixOS2] OS/2 v. Linux performance
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On Thu, 14 Mar 2002 12:24:45 +0000, John Poltorak wrote:

>> first of all : OS/2 tcp/ip stack must be slower then Linux stack, because of
>> OS/2 modularity
>Are there any benchtests to prove this? I have heard that the gcc version 
>of Mozilla is faster than the VAC version.

mozilla sucks. its a very hard GUI application and developed as very
'portable'.
not possible to make it realy fast on all platforms.
so its faster on better unix-GUI emulation & better unix-like compiler - gcc.
mozilla its just a port..

this is my opinion.

i wrote some tests for OS/2 tcp/ip stack, with different types of operations.
and stack is good enough. but not faster then linux stack :)

>> second: apache/emx must be slower because of : 1. emx layer 2. slow fork
>> implementation.
>Will libemx improve this sitution?

i think yes.
but we must ask Holger ;)

>> also current emx limited to 2048 sockets max.
>Do many people suffer from this restriction?

this is the limit for ALL currently runned emx programs.
this limit can be easy reached by heavy loaded squid or/and apache.

>Will it disappear in time?

emx uses so32dll.dll - limit inside this DLL (and also hardcoded inside
emx.dll arrays)
in new stacks tcpip32.dll must be used, with limit in ~~65535 sockets. (or
may be 32 k sockets?)
i successfully created 30000 sockets in my simple tst program.

>> for now there are :
>>    apache from ibm, threaded and compiled with VAC;

>Apache v2 is also threaded, but uses EMX AFAIK, but is claimed to be much 
>faster than v1. Is it possible to compare this version against IBM's?  

see the answer from Brian.

>>    web/2 tiny native os/2 threaded webserver;
>>    squid/VAC - not complited yet, but almost working.
>> they must be much better then emx ports.
>I thought that VAC was not very usable for Building Open Source Software...

VAC - is native and optimized compiler for OS/2. (but unsupported by IBM :E)
unixos2 ports uses emx runtime, witch is not effective now.
may be LIBEMU will be much better..

---
madded. [Red Hot Chili Hackers]