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Re: Threading the compiler

From: Michael Eager <eager at eagercon dot com>
To: Geert Bosch <bosch at adacore dot com>
Cc: Mike Stump <mrs at apple dot com>, GCC Development <gcc at gcc dot gnu dot org>
Date: Sat, 11 Nov 2006 11:48:24 -0800
Subject: Re: Threading the compiler
References: <D5E71E91-8A8D-4472-95DD-8C03C1E218C8@apple.com> <BC1CEB9F-ED21-49B1-AE64-D5BD0D0EA251@adacore.com>

Geert Bosch wrote:

Most of my compilations (on Linux, at least) use close
to 100% of CPU. Adding more overhead for threading and
communication/synchronization can only hurt.


On a single-processor system, adding overhead for multi-
threading does reduce performance.  On a multi-processor
system, the overhead is distributed across all processors, but
results in a net gain.  For parallelizations pprograms, a
4-way processor might achieve 3X performance improvement.

--
Michael Eager	 eager@eagercon.com
1960 Park Blvd., Palo Alto, CA 94306  650-325-8077

References:
- Threading the compiler
  - From: Mike Stump
- Re: Threading the compiler
  - From: Geert Bosch

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