| 1 |
-----BEGIN PGP SIGNED MESSAGE----- |
| 2 |
Hash: SHA1 |
| 3 |
|
| 4 |
Hi David, |
| 5 |
|
| 6 |
David Klempner wrote: |
| 7 |
> Note that without doing *anything*, with a normal 3G/1G split, you'll |
| 8 |
> actually get 896M. Recent kernels added in a config option to have a |
| 9 |
> 2.75G/1.25G split, which solves this problem; it makes sense to use that |
| 10 |
> if you have 1G of RAM. |
| 11 |
|
| 12 |
This option must be really new because I don't have it. I have two 3/1 |
| 13 |
options, a 2/2 option and a 1/3 option. Either way, I'm now using 2GB. |
| 14 |
|
| 15 |
> My understanding is that the performance hit from enabling high memory |
| 16 |
> support is actually fairly small; if you have more than 1G (where the |
| 17 |
> fix is unlikely to break anything) it's not worth worrying about. |
| 18 |
|
| 19 |
> My guesses is, as has already been suggested, that something is messed |
| 20 |
> up with your video driver. Did you recompile it when you recompile your |
| 21 |
> kernel? Is acceleration still working at all? Do you get the current |
| 22 |
> performance issues either without the extra RAM with a highmem kernel or |
| 23 |
> with the extra RAM without a highmem or 2G/2G kernel? |
| 24 |
|
| 25 |
Maybe this is the case, I'm not sure. For testing some other software I |
| 26 |
upgraded to 2.16.6.16 2 weeks ago (when I still had 1GB) which resulted |
| 27 |
in the same problem. I then went back to the previous-compiled 2.6.16.5 |
| 28 |
version which worked flawlessly. It is only now that I have actually |
| 29 |
rebuilt the 2.6.16.5 kernel (due to RAM upgrade) and am having the same |
| 30 |
problem. The NVidial kernel and glx (to be sure) were also rebuilt. |
| 31 |
|
| 32 |
I did a bit of testing last night before I went to bed and it seems that |
| 33 |
no matter what options I use in the kernel I'm getting bad performance |
| 34 |
now from the graphics card. It still gets > 4000 fps with glxgears |
| 35 |
though, so I'm not 100% sure it is the graphics card. |
| 36 |
|
| 37 |
The question I was meaning to ask is what the ideal kernel settings |
| 38 |
should be for 2GB of RAM... from there I'll look for other explanations |
| 39 |
why the 3d isn't performing well. |
| 40 |
|
| 41 |
Should I use 2/2 *and* highmem, or just 2/2 ? You suggest the highmem |
| 42 |
does very little, but it's there for a valid reason I take it. |
| 43 |
|
| 44 |
Thanks for the answers, |
| 45 |
Ralph |
| 46 |
-----BEGIN PGP SIGNATURE----- |
| 47 |
Version: GnuPG v1.4.2.2 (GNU/Linux) |
| 48 |
|
| 49 |
iD8DBQFEljNWCt0ZF9kLPvYRArMnAJ49+k5iZbZGr+UBiPOMtYCDzpJ0QgCghWkt |
| 50 |
KHDb0KCFbAnyyAQGymJvd70= |
| 51 |
=Weyw |
| 52 |
-----END PGP SIGNATURE----- |
| 53 |
-- |
| 54 |
gentoo-user@g.o mailing list |
Archives