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- Newsgroups: comp.os.minix
- Path: sparky!uunet!email!hp
- From: hp@vmars.tuwien.ac.at (Peter Holzer)
- Subject: Re: (none given)
- Message-ID: <1992Sep11.093444.223@email.tuwien.ac.at>
- Sender: news@email.tuwien.ac.at
- Nntp-Posting-Host: quasi.vmars.tuwien.ac.at
- Organization: Technical University Vienna, Dept. for Realtime Systems, AUSTRIA
- References: <1992Sep9.120116.13849@udel.edu> <ETLMIKE.92Sep10173232@jerry.ericsson.se>
- Date: Fri, 11 Sep 1992 09:34:44 GMT
- Lines: 25
-
- etlmike@jerry.ericsson.se (Mike Wilcox) writes:
-
- >Unfortunately, I have gone to the effort of changing the Minix
- >Centre's version of Minix-386 precisely to allow GCC to compile the
- >kernel.
- [...]
- >Now, granted I have a lot of other changes in my version of the
- >kernel, but I can say that after using GCC to compile this,
- >my system runs a LOT slower than when BCC compiled it in 32-bit
- >mode.
-
- Can you still compile your system with bcc (or c386)? If so, you could
- easily test if the lack of speed is due to the compiler or your
- changes.
-
- Also, gcc has gazillions of options to control optimization. Some of
- them (e.g. -fomit_frame_pointer) make a huge difference in speed. The
- code produced by gcc without optimization is quite slow, usually.
-
- Peter
- --
- | _ | Peter J. Holzer | Think of it |
- | |_|_) | Technical University Vienna | as evolution |
- | | | | Dept. for Real-Time Systems | in action! |
- | __/ | hp@vmars.tuwien.ac.at | Tony Rand |
-