[fpc-devel] CMem allocator memory alignment experiment

[Mark Morgan Lloyd]

Karoly Balogh (Charlie/SGR) wrote:

>> Perhaps the most serious scenario is where an architecture or particular
>> implementation requires alignment, but the kernel traps alignment errors and
>> fixes them silently. SPARC Solaris does this and my understanding is that it
>> introduces a very significant performance overhead;
> 
> Linux also does this.

On some but by no means all platforms. I'm specifically trying to 
highlight the fact that on SPARC, Solaris can fix alignment issues (at a 
price) but Linux doesn't try to. I don't know to what extent there are 
comparable issues on other platforms (in particular x86_64) for which 
both Solaris and Linux are implemented.

-- 
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

[Opinions above are the author's, not those of his employers or colleagues]