Linux-kernel mailing list archive 1998-31,: Re: vgacon / vesafb performance stats

# Re: vgacon / vesafb performance stats

Martin Mares (mj@ucw.cz)
Sun, 2 Aug 1998 16:56:40 +0200

- Messages sorted by: [ date ][ thread ][ subject ][ author ]
- Next message: Alexandr D. Kanevskiy: "VESA FB & PIO_FONTX"
- Previous message: Martin Mares: "Re: S3 High Speed text font support in vgacon.c [patch 2.1.112]"

Hi,

> I think that after weekend I do some more testing because of I'm interested
> how much MGA acceleration accelerates character drawing and bmove. I do
> not know, whether my results are relevant, because I cannot believe that
> my GRAPHICS driver can outperform character console from 2.0.34... Yes,
> it is fast, but...

I'm not sure how much of the test execution time is spent in the console
code -- if you send lots of five-character or one-character strings to the
console, the most of time is probably spent in syscall entry/exit, VFS layer,
verify_area and similar places. Try sending 32K blocks at once to see the
real console throughput.

Have a nice fortnight

    --
    Martin `MJ' Mares   <mj@ucw.cz>   http://atrey.karlin.mff.cuni.cz/~mj/
    Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth
    "Is there a life before death?"

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.rutgers.edu
    Please read the FAQ at http://www.altern.org/andrebalsa/doc/lkml-faq.html

- Next message: Alexandr D. Kanevskiy: "VESA FB & PIO_FONTX"
- Previous message: Martin Mares: "Re: S3 High Speed text font support in vgacon.c [patch 2.1.112]"