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Subject: Re: DIRECTMEMORY-9
From: =?iso-8859-1?Q?Michael_Andr=E9_Pearce?= <michael.andre.pearce@me.com>
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Date: Fri, 02 Mar 2012 07:54:34 +0000
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To: directmemory-dev@incubator.apache.org

Hi Benoit,

Though i should explain why i dont think issue 9 can be closed yet.

Conceived reason why it still is needed in my mind.

So buffer space is as such after loading it with some data
Pointer	Size	State
1		1m		full
2		2m		full
3		1m		full
4		2m		full
5		1m		full
6		2m		full
7		1m		full

I then free, pointers, 1,3,5 and 7.
Pointer	Size	State
1		1m		free
2		2m		full
3		1m		free
4		2m		full
5		1m		free
6		2m		full
7		1m		free

I then want to put 2m in the cache. I cant but there is 4m actually =
avail, needs defrag.

So atm im -1 for closing this story, i think the merging memory is a =
great idea, as it gives a quick win, without a more expensive defrag, =
but still think a defrag routine or algo is needed for the above.


On 2 Mar 2012, at 07:22, Michael Andr=E9 Pearce wrote:

> I think you may want some defragmentation still, especially if the =
buffers a fair % full and the free pointers are spread, would mean that =
if any larger object that the free pointers arent large enough for, but =
in total could hold, without defrag would mean wouldn't be able to =
store.
>=20
>=20
> On 2 Mar 2012, at 07:15, Benoit Perroud wrote:
>=20
>> Hi All,
>>=20
>> Now with DIRECTMEMORY-40 done and a new slab's style allocator, I
>> wonder if DIRECTMEMORY-9 is still relevant or if it could also be
>> closed.
>>=20
>> Thanks,
>>=20
>> Benoit.
>=20