'bogoMIPS'에 해당되는 글 2건

  1. 2010.03.03 bogoMIPS on E5400
  2. 2009.11.12 BogoMIPS - cpu 성능 측정하는 방법중 하나
하드웨어2010.03.03 16:14
혹시 E5400 이라고 붙은 이유가..
bogomips로 5400이 나와서 그런건 아니겠지? ㄱ-

아무튼 단순 수치상으로 2개 프로세서니까, 10800MIPS가 되는걸려나?

# cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 23
model name      : Pentium(R) Dual-Core  CPU      E5400  @ 2.70GHz
stepping        : 10
cpu MHz         : 2700.095
cache size      : 2048 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr lahf_lm
bogomips        : 5403.74

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 6
model           : 23
model name      : Pentium(R) Dual-Core  CPU      E5400  @ 2.70GHz
stepping        : 10
cpu MHz         : 2700.095
cache size      : 2048 KB
physical id     : 0
siblings        : 2
core id         : 1
cpu cores       : 2
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr lahf_lm
bogomips        : 5400.07


2009/11/12 - [하드웨어 관련] - BogoMIPS - cpu 성능 측정하는 방법중 하나


Pentium(R) Dual-Core  CPU      E5400  @ 2.70GHz
bogomips        : 5403.74

Intel(R) Pentium(R) D CPU 3.00GHz
bogomips        : 5988.40

Intel(R) Xeon(R) CPU           X3320  @ 2.50GHz
bogomips        : 6236.74

Intel(R) Pentium(R) 4 CPU 2.66GHz
bogomips    : 5319.93

Intel(R) Pentium(R) M processor 1.20GHz under Portable Ubuntu TRES (9.10)
bogomips    : 5872.02 / 5319.93 / 4246.73
bogomips    : 2510.02 (Speed Step to 600Mhz)

Intel XScale-PXA255 rev 6 (v5l)
BogoMIPS        : 396.56

STb7100 Reference board (SH4)
bogomips        : 262.14

STBx25xx (PPC)
bogomips        : 250.36

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Posted by 구차니
TAG bogoMIPS

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하드웨어2009.11.12 14:59

BogoMips (from "bogus" and MIPS) is an unscientific measurement of CPU speed made by the Linux kernel when it boots, to calibrate an internal busy-loop. An oft-quoted definition of the term is "the number of million times per second a processor can do absolutely nothing."

BogoMips can be used to see whether it is in the proper range for the particular processor, its clock frequency, and the potentially present CPU cache. It is not usable for performance comparison between different CPUs

For i386 architecture delay_loop is implemented in /usr/src/linux/arch/i386/lib/delay.c as:
/* simple loop based delay: */

static void delay_loop(unsigned long loops)
{
  int d0;
  __asm__ __volatile__(
    "\tjmp 1f\n"
    ".align 16\n"
    "1:\tjmp 2f\n"
    ".align 16\n"
    "2:\tdecl %0\n\tjns 2b"
    :"=&a" (d0)
    :"0" (loops));
}
[링크 : http://en.wikipedia.org/wiki/BogoMips]

어쩌면 가장 단순하면서 명쾌한(?!) cpu의 성능 측정 비교 방법이다.

2010/03/03 - [하드웨어 관련] - bogoMIPS on E5400

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Posted by 구차니

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