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I am running VirtualBox (using the Qiime image http://qiime.org/install/virtual_box.html)

The physical hardware is a 32 core machine. The virtual machine in VirtualBox has been given 16 cores.

When booting I get:

Ubuntu 10.04.1 LTS Linux 2.6.38-15-server # grep . /sys/devices/system/cpu/* /sys/devices/system/cpu/kernel_max:255 /sys/devices/system/cpu/offline:1-15 /sys/devices/system/cpu/online:0 /sys/devices/system/cpu/possible:0-15 /sys/devices/system/cpu/present:0 /sys/devices/system/cpu/sched_mc_power_savings:0 # ls /sys/kernel/debug/tracing/per_cpu/ cpu0 cpu1 cpu10 cpu11 cpu12 cpu13 cpu14 cpu15 cpu2 cpu3 cpu4 cpu5 cpu6 cpu7 cpu8 cpu9 # ls /sys/devices/system/cpu/ cpu0 cpufreq cpuidle kernel_max offline online possible present probe release sched_mc_power_savings # echo 1 > /sys/devices/system/cpu/cpu6/online -su: /sys/devices/system/cpu/cpu6/online: No such file or directory

So it seems it detects the resources for 16 CPUs, but it only sets one online.

I have tested with another image that the VirtualBox host can run a guest with 16 cores. That works. So the problem is to trouble shoot the Qiime image to figure out why this guest image only detects 1 CPU.

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  • 3
    Is it booting an SMP enabled kernel? uname -v should output something like "#1 SMP Thu May 3 14:46:44 UTC 2012" Commented May 11, 2012 at 14:23
  • Yes. #59~lucid1-Ubuntu SMP Mon Apr 30 23:56:18 UTC 2012 Commented May 12, 2012 at 23:24
  • is IO_APIC enabled ? Commented May 19, 2012 at 1:48
  • How do I test if IO_APIC is enabled? Commented May 20, 2012 at 12:09

2 Answers 2

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It sounds like your VM has been configured to provide a single virtual cpu.

The following documentation might help you in reconfiguring your VM to provide multiple cores:

https://www.virtualbox.org/manual/ch03.html#settings-processor

This may help, I had a similar issue with an Ubuntu VM. This help me with my original question

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  • As mention in the question I already tried that. Commented May 20, 2012 at 1:51
-1

QIIME came out with a new virtualbox image (version 1.5), which works.

If no one finds the answer to the problem above I will close the question in a week.

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