Stephane Fillod wrote:
On Mon, Aug 22, 2005 at 12:44:58AM -0400, Krzysztof Kamieniecki wrote:
[..]
model name : AMD Athlon(tm) 64 Processor 3700+
stepping : 10
cpu MHz : 797.986
Krzysztof, I haven't seen your reply about the cpu speed.
Is the cpu MHz output right? 800MHz? Or is it automatic PowerNow?
What is the max cpu speed?
It is PowerNow. The max CPU speed is 2400MHz
***gnuradio-core/src/test/benchmakr_dotprod output:
generic: taps: 256 input: 4e+07 cpu: 11.330 taps/sec: 9.038e+08
3DNow!: taps: 256 input: 4e+07 cpu: 5.095 taps/sec: 2.01e+09
SSE: taps: 256 input: 4e+07 cpu: 4.506 taps/sec: 2.272e+09
Have you tried out the latest CVS code with 64bit x86-64 speedup?
I'm curious what's the difference between 32bit and 64bit speedups.
Note: gcc-4.x still does a good job at optimizing the generic loop.
I tried the benchmark with the CPU scaling_governor set to performance at which point Linux tells me
that the processor is running at the full 2.4GHz and the benchmarks were basically the same. My
embarrassing secret (which I revealed to Eric off the list) is that I am running debian with a
2.4.12 i686 kernel, mainly because the production system we are using is an Intel 32bit CPU and I
did not want to mess with a 64bit kernel/OS just yet.
--
Krzysztof Kamieniecki
callsign:KB1KLB
mailto:[EMAIL PROTECTED]
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