Re: Extremely poor performance crunching random numbers under FC5

BankHacker wrote:
Hi, I have installed Linux Fedora Core 5 (FC5) on a Pentium IV 3 Ghz, 4
Gb RAM, and SATA disk.

> [performance differences with static vs. dynamic linked binary]
This is FC3 on an

$ cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 3
model name : AMD Duron(tm) Processor
stepping : 0
cpu MHz : 757.640
cache size : 64 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 mtrr pge mca cmov pat pse36 mmx fxsr pni syscall mmxext 3dnowext 3dnow
bogomips : 1490.94

$ static-perf
Reservado 0.1 Gb de memoria en 0.000 sec
Escritura sobre 0.1 Gb de memoria en 2.170 sec
10 M de rand() en 0.630 sec (example.: 677719438)
10 M de sqrt(i) en 1.290 sec (example.: 3162)
10 M de log(i) en 3.260 sec (example.: 16)
10 M de log10(i) en 3.030 sec (example.: 6)
LINUX: 10 M de random() en 0.600 sec (example.: 2114483955)
LINUX: 10 M de lrand48() en 1.110 sec (example.: 373287025)

$ dynamic-perf
Reservado 0.1 Gb de memoria en 0.000 sec
Escritura sobre 0.1 Gb de memoria en 1.970 sec
10 M de rand() en 0.940 sec (example.: 1090806691)
10 M de sqrt(i) en 1.330 sec (example.: 3162)
10 M de log(i) en 3.040 sec (example.: 16)
10 M de log10(i) en 3.060 sec (example.: 6)
LINUX: 10 M de random() en 0.790 sec (example.: 1849365506)
LINUX: 10 M de lrand48() en 1.250 sec (example.: 361466127)

Of course, other hardware, no SATA. OK, it's just an example and does not proof anything.

Herbert
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