VB Freeze while using multi cpu

[Alexey Kuznetsov]

VB Freeze every 30-60 minutes while compiling the cyanogenmod.org repo. Hudge IO operations cause application to freeze and do not respond to any click. Even VB GUI application frezze until you kill VB Guest.

1 CPU does not freeze (but it takes forever to comiplie the source, so i havent tested it mutch)

[Alexey Kuznetsov]

playing with it all day:

• vbox can hungs even at boot if numbers of CPU's > 1 (even 2 will stuck the VB)
• i have anohter notebook with i7 cpu, with 4 cores - no hungs
• seems like it is only Mac Pro issue with 2 x 2.93 GHz 6-Core Intel Xeon (24 cores)

[Alexey Kuznetsov]

my laptop cpu: 2,66 GHz Intel Core i7

working fine even for 4 cpu running.

[Alexey Kuznetsov]

it is standing on night long with 1 cpu and 2 x 2.93 GHz 6-Core Intel Xeon with no issues.

[Alexey Kuznetsov]

4.3 keep hunging

[Frank Mehnert]

You have 12 physical CPU cores and you assign 24 virtual CPUs to your guest -- how should that work? Do you still experience these hangs if you assign not more than 12 virtual CPUs to your guest?

[Alexey Kuznetsov]

I have 12 real cores + hyperthreading for each. Normally linux and all apps detecting 24 cors.

Processor 2 x 2,93 GHz 6-Core Intel Xeon

including VirtualBox. It allows me to assign 24 cores (saying it is a max).

Now it wont even boot, hungs at the begining. 12 hungs as well at boot.

[Frank Mehnert]

Hyperthreads don't count, please never use more than 12 guest CPUs. It's still unclear why the VM hangs with 12 guest CPUs. Are you running several VMs in parallel?

[Alexey Kuznetsov]

nope. only one machine. even if i use 2 cores it hungs (can't confirm it for 4.3VB yet, takes some time)

[Alexey Kuznetsov]

and about your statement about cores. now i'm runining VB with 2 cores attached. cat /proc/cpuinfo also shows 2 cores (i can assume, if you suggest not to use hypertreading cores with vb, then vb shall emulate hypertreading by it self, but it doesnt)

axet@ubuntu2:~/source/cm-10.1-odroidu2$ cat /proc/cpuinfo 
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 44
model name	: Intel(R) Xeon(R) CPU           X5670  @ 2.93GHz
stepping	: 2
cpu MHz		: 2932.819
cache size	: 6144 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 2
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 5
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl pni ssse3 lahf_lm
bogomips	: 5865.63
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 44
model name	: Intel(R) Xeon(R) CPU           X5670  @ 2.93GHz
stepping	: 2
cpu MHz		: 2932.819
cache size	: 6144 KB
physical id	: 0
siblings	: 2
core id		: 1
cpu cores	: 2
apicid		: 1
initial apicid	: 1
fpu		: yes
fpu_exception	: yes
cpuid level	: 5
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl pni ssse3 lahf_lm
bogomips	: 5865.63
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:
power management:

axet@ubuntu2:~/source/cm-10.1-odroidu2$ 

[Alexey Kuznetsov]

8 cores hungs

[Alexey Kuznetsov]

4 cores hungs (at boot time)

[Alexey Kuznetsov]

2 cores hungs (at compile time)

[Frank Mehnert]

VirtualBox does not need to emulate hyperthreading. Just don't count the hyperthreads when considering the number of virtual CPUs, that's it. That's a general remark, not necessarily related to your hang problem.

[Frank Mehnert]

Oh, I forgot to ask: What kind of guest are you running?

[Alexey Kuznetsov]

Host: Mac 64, Guest: Ubuntu 64

[Alexey Kuznetsov]

On Maveric, it does not hungs, but also does not load more then 2 cpu (200% on the activity maganer) even if I have more then 2+ CPU assigned to the VB

[Alexey Kuznetsov]

On the same hardware a have native linux installation and VB on it. It has no issues even with 24 CPUS!

So. Here is a two reasons why it is a OSX HOST issue ( 1) maverics act different 2) linux on the same hardware works fine ). Not hardware!

[Alexey Kuznetsov]

Freeze under linux too. So it is a CPU issue

[aeichner]

Please reopen if still relevant with a recent VirtualBox release.