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Incorrect number of CPUs detected
Posted: 26. Aug 2014, 23:45
by SGorodskoy
Hello!
I just downloaded Virtual Box 4.3.14 r95030 and ran into a problem: it allows setting maximum of 2 CPU per virual machine (even that with error "Invalid setting detected").
I have i7-4930K processor (6 cores) with 16GB RAM on Windows 2003 Enterprise Edition Server x64. MSInfo32/Taskmanager shows 12 CPU cores.
I also tried few older versions of Virtual Box (4.2 and older), but they fail to even start correctly.
Please advice where should i look.
Re: Incorrect number of CPUs detected
Posted: 27. Aug 2014, 00:36
by Perryg
Post the guests log file ( as an attachment )
Re: Incorrect number of CPUs detected
Posted: 27. Aug 2014, 01:00
by SGorodskoy
Here it is, if it can make any difference.
Re: Incorrect number of CPUs detected
Posted: 27. Aug 2014, 01:15
by Perryg
Code: Select all
00:00:01.131088 Guest OS type: 'Windows2008'
00:00:01.229331 IOAPIC <integer> = 0x0000000000000000 (0)
00:00:01.232008 CPUM: Matched host CPU INTEL 0x6/0x3e/0x4 Intel_Core7_IvyBridge with CPU DB entry 'Intel Core i5-3570' (INTEL 0x6/0x3a/0x9 Intel_Core7_IvyBridge).
00:00:01.846595 Logical host processors: 12 present, 12 max, 12 online, online mask: 0000000000000fff
00:00:01.846649 Physical host cores: 1
00:00:01.846731 Full Name: Intel(R) Core(TM) i7-4930K CPU @ 3.40GHz
I assume you are wanting to install the guest as an x86 with SMP. You will need ioapic enabled for this to happen.
But I also see the cpu test does not detect your processor properly, which may be the real issue. You will need to post a ticket at
bugtracker and attach this log file and give the explanation of what it should be and what you actually have.
Note: it is not uncommon that the cpu test does not match exactly but in this case I believe it is an issue.
Re: Incorrect number of CPUs detected
Posted: 27. Aug 2014, 01:36
by SGorodskoy
I tried creating different machine types: x86/x64, linux/windows, xp/2012 etc, so i am sure that the problem is in CPU test.
Re: Incorrect number of CPUs detected
Posted: 22. Sep 2014, 20:48
by ven
Hello dears,
Virtual guest xp32 \1gb ram, 10gb hd\ on host win7 - 64 \ AMD 6 core \real\, 8 gb ram\. In guest xp32 only 1 core!!! In options i made 2, 3, 4, 6 cores but in guest only 1?!?