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Date:      Thu, 2 Feb 2006 18:11:37 +1100
From:      Peter Jeremy <peterjeremy@optushome.com.au>
To:        "Daniel O'Connor" <doconnor@gsoft.com.au>
Cc:        freebsd-current@freebsd.org
Subject:   Re: KDE 3.5.0 seems much chubbier than 3.4.2
Message-ID:  <20060202071137.GB921@turion.vk2pj.dyndns.org>
In-Reply-To: <200602020952.39010.doconnor@gsoft.com.au>
References:  <200601301652.16237.doconnor@gsoft.com.au> <200602011424.57722.doconnor@gsoft.com.au> <17376.65268.396436.72837@roam.psg.com> <200602020952.39010.doconnor@gsoft.com.au>

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On Thu, 2006-Feb-02 09:52:22 +1030, Daniel O'Connor wrote:
>Also, xrestop shows X using 120Mb of pixmaps.
>X's size is 315M, and I have a 64Mb video card.
>
>64 + 120 =3D 184
>315 - 184 =3D 131
>
>ie 131Mb of space that X is using but no obvious reason..

There's a lot more to X than the video memory and pixmaps.

In my case (this is X.org 6.9.0 on 6-stable/amd64 but the principle is
the same), I have 32MB video RAM, 28MB pixmaps and ps report that X
is using 78MB - a difference of 18M.

If I look at the process memory map (see procfs(5)), the breakdown is:
38MB  vnode backed (mostly shared libraries)
32MB  device (video memory)
 6.75MB swap + default (malloc'd space, stack etc)

This suggests that X is storing a lot of pixmaps in video RAM (for
efficiency).

--=20
Peter Jeremy

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