IBM's C/370 Compiler for MVS... Optimizing I/O (Dave Crain)
Tue, 21 Feb 1995 23:17:02 GMT

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IBM's C/370 Compiler for MVS... Optimizing I/O (1995-02-21)
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Newsgroups: comp.compilers,comp.lang.c
From: (Dave Crain)
Keywords: C, performance, question
Organization: LEXIS-NEXIS, Dayton OH
Date: Tue, 21 Feb 1995 23:17:02 GMT

OK gang, I am looking for either a person who is knowledgable in the
above topic or to be pointed to the right newsgroup where I might
find someone who is.

And before I get all beat on the net, I am one of those developers
who codes in both the UNIX and Mainframe worlds.

I went thru the fun task of having to revisit some code here that
was last touched over 4 years ago and was compiled under IBM's C/370
Ver.1, Rel.1 and ported it to the newest version 2.2.

The code I have at this minute is taking a beating in its I/O performance,
it has increased by 1000%. The IBM manuals on its latest compiler is
unclear on which function for reading and writing data are the best
for optimizing I/O.

I am open to any sugestions, please let me know.



PS. Our people have put out a note to IBM, but I thought I might get
a faster response from one of you all on the net.

Kind of anxious, huh ??????
David B. Crain Fabrication Systems Support
(513) 865-6800 x6303 ...!uunet!meaddata!davecr

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