Re: [Bug 350] New: i386 context switch very slow compared to 2.4

[Thomas Molina]

> > You can run this (stupid) test-program to try. On my P4 I get
> > 
> > 	empty overhead=320 cycles
> > 	load overhead=0 cycles
> > 	I$ load overhead=0 cycles
> > 	I$ load overhead=0 cycles
> > 	I$ store overhead=264 cycles

On my Athlon 1.3GHz system I get:
[tmolina@dad tmolina]$ cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 6
model           : 4
model name      : AMD Athlon(tm) Processor
stepping        : 2
cpu MHz         : 1343.030
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 sep mtrr pge mca cmov 
pat pse36 mmx fxsr syscall mmxext 3dnowext 3dnow
bogomips        : 2637.82

empty overhead=16 cycles
load overhead=1 cycles
I$ load overhead=1 cycles
I$ load overhead=1 cycles
I$ store overhead=763 cycles