Re: ARAnyM speed
Followup-To: poster
On Sat, 11 May 2013, Thorsten Glaser wrote:
> For the record: the new CPU is
> Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz
> and the old one was an AMD X4 II or something like that.
Oh, interesting. This seems to really be something on the
setup of the machine – I installed BOINC on three boxen,
and the benchmark results look like this:
• the slow box:
GenuineIntel Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz [Family 6 Model 26 Stepping 5]
Measured floating point speed 613.16 million ops/sec
Measured integer speed 3304.48 million ops/sec
• another i7 with same specs:
GenuineIntel Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz [Family 6 Model 26 Stepping 5]
Measured floating point speed 3090.63 million ops/sec
Measured integer speed 12634.06 million ops/sec
• an AMD, for comparison:
AuthenticAMD AMD Phenom(tm) II X4 965 Processor [Family 16 Model 4 Stepping 3]
Measured floating point speed 3175.31 million ops/sec
Measured integer speed 15516.88 million ops/sec
So I wasn't exactlt wrong when saying that AMD is still
faster (except this one has 3.4 GHz and 6830.50 BogoMIPS)
but I would expect the two i7 to have similar performance,
not about ONE FIFTH (in float) and ONE QUARTER (in int).
The /proc/cpuinfo of the two i7 systems only have a grand
total of eight *lines* differ, one per CPU core, this one:
-bogomips : 6128.75
+bogomips : 6206.92
(the - is my slow desktop, the + is the fast box).
So this is probably some kind of hardware/BIOS issue.
I have no idea where to look but now I at least know,
somewhat, how to bench (pybench would probably also
work). Ideas welcome, but off-list, since this is no
ARAnyM or Debian issue.
bye,
//mirabilos
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