multimedia/MMX, Celeron CPU, and the kernel config
leblanc+freebsd at keyslapper.org
Sun Aug 31 16:40:29 PDT 2003
Hey all. I've just installed the mplayer and mplayerxp ports for
video support. I've never quite had it right with aviplay and
plaympeg, but I never quite understood why.
Well, when I run mplayer, I get the following:
CPU: Intel Celeron A Mendocino/Pentium II Dixon (Family: 6, Stepping: 0)
Detected cache-line size is 32 bytes
CPUflags: MMX: 1 MMX2: 0 3DNow: 0 3DNow2: 0 SSE: 0 SSE2: 0
Compiled with Runtime CPU Detection - WARNING - this is not optimal!
To get best performance, recompile MPlayer with --disable-runtime-cpudetection
And mplayerxp gives the following:
CPU vendor name: GenuineIntel max cpuid level: 2
CPU: Intel Celeron A Mendocino/Pentium II Dixon (Type: 6, Stepping: 0)
MMX supported but disabled
CPUflags: Type: 6 MMX: 0 MMX2: 0 3DNow: 0 3DNow2: 0 SSE: 0 SSE2: 0
Compiled for x86 CPU with features: 3DNow 3DNowEx SSE
So I'm confused as to whether I've got the best configuration for my
custom kernel. Is there a way I can discover the exact model of my
cpu without cracking the case?
I'm running: 4.8-RELEASE #0: built Sat Apr 12, 2003.
The boot process logs the following:
CPU: Pentium II/Pentium II Xeon/Celeron (399.12-MHz 686-class CPU)
The machine is a Dell Optiplex G1, that was built several years ago,
and given to me by my employer in a surplus lottery almost 2 years
ago. I've put a new hard drive and video card in it, but that's about
it. AFAIK, the machine had been unmodified before I got it.
BTW, I have the following enabled in my kernel config:
Plus of course, the various devices. There is no SCSI card in the
machine at the time, so I don't know if the SCSI_DELAY option makes
I have found a few other options I'm not sure about, the
CPU_PPRO2CELERON, CPU_L2_LATENCY, and CPU_ENABLE_SSE options. I'm
just not sure if they apply in my specific case. I'm thinking the
CPU_ENABLE_SSE option does, but before I go to the bother of changing
my kernel config and rebuilding, I'd like to know if it is going to
make even a little difference.
Can anyone give me a pointer? Anything will be welcome, whether a
URL, or a direct indication.
Louis LeBlanc leblanc at keyslapper.org
Fully Funded Hobbyist, KeySlapper Extrordinaire :)
We can defeat gravity. The problem is the paperwork involved.
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