Hi!
Is there a known problem with Xen 2.0.6 and MMX on Pentium III?
I have a program with an optimized routine that uses MMX instructions.
This program's self test failed 3 out of 4 times when it was running
under a Xen domain 0 kernel (2.6.11.10).
The code is known to work and i'm quite sure it's not a hardware problem
as it works fine if i reboot and run it in Linux without the hypervisor.
I saw someone had a problem with FPU a couple of months ago but i
believe his problems disappeared when he switched from 2.0.5 to 2.0.6.
(If i recall correctly, this guy also had a p3 500mhz cpu).
Could this be a similar issue where SIMD regs aren't saved/restored
properly?
-- j
/proc/cpuinfo:
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 2
cpu MHz : 495.127
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca
cmov pat pse36 mmx fxsr sse
Software:
Xen 2.0.6
Linux 2.6.11.10 domain 0 kernel
gcc version 3.3.5-20050130 (Gentoo Linux 3.3.5.20050130-r1,
ssp-3.3.5.20050130-1, pie-8.7.7.1)
glibc-2.3.4.20041102-r1 without NTPL / TLS
Sources for the above Xen stuff was obtained from installing stuff from
the tarball on http://bugs.gentoo.org/show_bug.cgi?id=70161
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