Re: intel x540-at2

Hi,

Just to let you know that the invalid instruction error above went away
when AVX was enabled using host model cpu mode in the VM.

Thanks,
Pepe


On Mon, Jan 6, 2014 at 2:03 PM, Jose Gavine Cueto [off-list ref]wrote:

Hi Thomas,

On Sun, Jan 5, 2014 at 10:54 PM, Thomas Monjalon <
thomas.monjalon-pdR9zngts4EAvxtiuMwx3w@public.gmane.org> wrote:

quoted

05/01/2014 22:31, Jose Gavine Cueto :

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venky.venkatesan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> wrote:

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Was the DPDK library compiled on a different machine and the used in

the

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VM? It looks like it has been compiled for native AVX (hence the
vzeroupper). Could you dump cpuinfo in the VM and see what

instruction set

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the VM supports?

Yes, it was compiled in a different machine and it was used in my VM.

[...]

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model name      : Intel(R) Core(TM) i5-3340M CPU @ 2.70GHz
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge

mca

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cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx rdtscp lm

constant_tsc

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rep_good nopl pni monitor ssse3 lahf_lm

[...]

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 It seems that there is no avx here, does this mean this doesn't support
avx instructions ?

Yes, you have no avx on this machine.
Tip to clearly check this type of flag:
        grep --color -m1 avx /proc/cpuinfo

So, you have 2 solutions:
1) build DPDK on this machine
2) build DPDK for a default machine:
        CONFIG_RTE_MACHINE=default
defconfig files are wrongly called "default" but have CONFIG_RTE_MACHINE
set to
native. So the compilation flags are guessed from /proc/cpuinfo. You can
look
for AUTO_CPUFLAGS to better understand it.

--
Thomas

Thanks and I will try your suggestion.  I will also post the result
whenever it is available, for the meantime I will be rebuilding the DPDK
lib.

Cheers,
Pepe

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To stop learning is like to stop loving.