Re: [Xen-devel] *massive* slowdown when running oprofile in dom0

[Gianni Tedesco <gianni.tedesco@xxxxxxxxxx>]

On Wed, 2010-09-01 at 10:06 +0100, Gianni Tedesco wrote:
> Please tell me it's bad hardware...
> 
> # cat /proc/cpuinfo 
> processor     : 0
> vendor_id     : GenuineIntel
> cpu family    : 15
> model         : 6
> model name    : Genuine Intel(R) CPU 3.00GHz
> stepping      : 2
> cpu MHz               : 2999.892
> cache size    : 2048 KB
> fdiv_bug      : no
> hlt_bug               : no
> f00f_bug      : no
> coma_bug      : no
> fpu           : yes
> fpu_exception : yes
> cpuid level   : 6
> wp            : yes
> flags         : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush
> acpi mmx fxsr sse sse2 ss ht nx constant_tsc up pni vmx est cid
> bogomips      : 6004.03
> clflush size  : 64
> power management:

Tried on a different machine with following cpuinfo (ie. a core 2, not a
p4) - and now it slows down winxpsp3 boot from 30s to more like 15
minutes (yes.. 30x slowdown) with an average of 400 xenoprof interrupts
per second and dom0 CPU at 99% idle with very little disk I/O.

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 26
model name      : Genuine Intel(R) CPU           @ 0000 @ 2.93GHz
stepping        : 2
cpu MHz         : 2933.550
cache size      : 8192 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
wp              : yes
flags           : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov pat clflush 
acpi mmx fxsr sse sse2 ss ht nx constant_tsc up pni vmx est ssse3 sse4_1 sse4_2 
x2apic popcnt ida
bogomips        : 5868.53
clflush size    : 64
power management:



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel