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Re: Performance measurements
- To: Martin Kahlert <martin dot kahlert at mchp dot siemens dot de>
- Subject: Re: Performance measurements
- From: Aubert Pierre <paubert at laninsa dot insa-lyon dot fr>
- Date: 26 Jun 1998 08:48:36 +0200
- Cc: egcs at cygnus dot com
- References: <199806240851.KAA06049@keksy.mchp.siemens.de>
Martin Kahlert <martin.kahlert@mchp.siemens.de> writes:
> Hi,
> i tried to compare different compilers on my numerical code.
> Therefore i extracted a FPU intensive function and surrounded
> it with a loop while measuring the execution time.
>
> I will provide the source and the Makefile at the end of this mail.
>
> I work on a Linux 2.0.34 SMP Kernel (libc5). My hardware is a
> dual Pentium Pro 200MHz system with 128MB RAM.
>
> pgcc is the portland group compiler and
> tcc the free Tendra compiler system
> (from http://alph.dera.gov.uk/TenDRA/)
>
> Here are my results:
> %> make
> pgcc:
> 90.11 MFLOPS
> gcc-2.7.2.1:
> 95.46 MFLOPS
> gcc-without double align:
> 23.52 MFLOPS
> egcs-2.91.42:
> 69.96 MFLOPS
> tcc:
> 92.33 MFLOPS
Just for information, on HP
PA7200: gcc-2.7.2.2 -O3 : 26.63 MFLOPS
PA7200: egcs-2.91.42 -O3 : 47.13 MFLOPS
PA7200: cc -Ae +O4 : 52.88 MFLOPS
PA8000: gcc-2.7.2.2 -O3 : 108.31 MFLOPS
PA8000: egcs-2.91.42 -O3 : 97.10 MFLOPS
PA8000: cc +DA1.1 -Ae +O4 : 129.47 MFLOPS
PA8000: cc +DA2.0 -Ae +O4 : 216.62 MFLOPS
egcs faster on PA8000 and slower on PA7200 than gcc-2.7.2.
cc is faster du to a better support of special instructions.
Is there a planed support for PA2.0 on HP?