*lcul and memory granularity question[Was: [parisc-linux] 2.6.10-rc1-pa11 profile data]

From: Joel Soete <soete.joel@tiscali.be>
Cc: parisc-linux@lists.parisc-linux.org
Subject: *lcul and memory granularity question[Was: [parisc-linux] 2.6.10-rc1-pa11 profile data]
Date: Fri, 03 Dec 2004 15:00:33 +0000	[thread overview]
Message-ID: <41B07F91.9000000@tiscali.be> (raw)
In-Reply-To: <20041111081154.GR15714@tausq.org>

Hello all,

Randolph Chung wrote:
> - *lclu* can be rewritten to do better than 1-byte at a time

I have an additional question about parisc alignment and this remark:
a char type var is 1byte align; ... but what's about a 3, 5, 7 and more bytes struct size?

My idea is that a 3bytes could be align as a 32bites word and clearing such struct could be done by clearing all the word;
the same for 5 and 7 bytes if aligned as 2*32bites and so on for an unrolled loop of the max cache size (128 bytes iirc);
and btw using a case define as we use for __put/get__user/kernel_asm?

Or the memory management is more complex then I imagine and I would really consider a 3bytes as 2+1 bytes (5=2*2+1, ...)?

Thanks a lot,
	Joel
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