List,
I just logged in to a machine with a modern AMD cpu, it also has a TSC.
jeroen@monk:~> cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 6
model name : AMD Athlon(TM) XP 2000+
stepping : 2
cpu MHz : 1668.736
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow
bogomips : 3329.22 /^\
|
So, I think you have to pull some managers' tie and demand new hardware :)
Jeroen.
On Mon, 15 Mar 2004 12:11:05 +0000
Maria Joana Urbano <stmaria@xxxxxxxxx> wrote:
>
>
> Hi Jeroen,
>
> Thanx for your fast answer.
>
>
> >to use the TSC, the processor has to have a tsc, you can see that in
> >/proc/cpuinfo, for as far as I know, every P4 has it (but I'm not sure),
> >it's in the "flags" of cpuinfo:
> >
> >On my P4-1800:
> >
> >flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
> >cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm
> >
> >The "loop calibrated" jiffies stuff dates back to 386, it's used
> >everywhere in the kernel timing, and it's very inaccurate, I don't know if
> >2.6 still uses it everwhere, what kind of processor do you have?
>
> I am using and old test machine with an AMD-K7 processor. I think that's
> the reason I cannot use TSC, it only works in Pentium processors.
>
>
> >I've never tried to change the Hz value, does changing it in param.h
> >really changes the frequency of the clock ticks? If so, why is the default
> >only 100Hz these days? doesn't make sense to me.
>
> I have no ideia why it is still at 100Hz. However, I took this clue from [1].
>
> >I do use the PSCHED_CPU in a production environement at the moment, works
> >fine.
>
> OK, that's good news :-)
>
> Regards,
> Joana
>
>
> [1] K. Wagner, "Short Evaluation of Linux's Token-Bucket-Filter (TBF)
> Queuing Discipline"
>
_______________________________________________
LARTC mailing list / LARTC@xxxxxxxxxxxxxxx
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
