Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!psuvax1!uwm.edu!wuarchive!emory!jdyx!shawn
From: shawn@jdyx.UUCP (Shawn Hayes)
Newsgroups: comp.unix.aix
Subject: Performance of AIX 1.2
Message-ID: <1990Aug28.012042.21056@jdyx.UUCP>
Date: 28 Aug 90 01:20:42 GMT
Distribution: usa
Organization: JDyx Enterprises (Atlanta GA)
Lines: 29


  I'm trying to get the performance of a PS/2 model 70 running AIX 1.2
up and I'm looking for pointers.  Currently my system has 6 megs of
memory and 2 megs of paging space. 

The method of gauging performance is an in-house benchmark that consists of
a PC sending transactions to the PS/2.  The PS/2 has a program that reads
the transactions from the com port and then passes them onto a second program.
The first program then acknowledges the txn to the PC and waits for another
txn.  The second program reads the txn from a queue and puts the information
into a database.

The performance is being gauged by running the same benchmarks under OS/2 and
AIX 1.2 on the same hardware.  Currently we are finding OS/2 to run about
twice as fast as AIX 1.2.   Part of the problem is that for this test we
want all writes to be posted to disk immediately so the test uses an open
call with sync mode for each of the three files accessed.  

I've increased the buffer size, the msg table size, and total message space
but the numbers still don't match the OS/2 performance.

If anyone has any suggestions please speak up.

Btw, the combined size of the benchmark programs is probably 150k and we
are not running XWindows while doing the benchmarks so page space should not
be a problem.


Shawn Hayes