Re: F9 and KVM

Gerry Reno <greno@xxxxxxxxxxx> · Thu, 08 May 2008 10:47:38 -0400

Richard W.M. Jones wrote:

  On Thu, May 08, 2008 at 02:22:51AM -0400, Gerry Reno wrote:

    Ok, I tried creating some fresh images using virt-manager.  I'm not having 
much luck.  I try creating a f7 and f9 vm.  On both installs the installer 
runs slow.  Much slower than equivalent vm in vmware under F7.  Also both 
installs get stuck at prompt to initialize /dev/sda.  When you answer 'yes' 
it takes almost 10 minutes for a prompt to come back and say it had some 
error and retry,ignore,cancel.   I'm wondering if the speed issue is 
related to this being a quad-core machine? 

It's more likely down to your hardware either not supporting hardware
virtualization, or supporting it really badly.  Is the kvm-intel or
kvm-amd module loaded into the kernel?  Did 'dmesg' say anything when
it was loaded?  What is in /proc/cpuinfo flags?

Rich.

Rich,

  The hardware appears to support hardware virtualization:

======================================================

# grep svm /proc/cpuinfo

flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc pni monitor cx16 popcnt
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse
3dnowprefetch osvw ibs ts ttp tm stc 100mhzsteps hwpstate

flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc pni monitor cx16 popcnt
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse
3dnowprefetch osvw ibs ts ttp tm stc 100mhzsteps hwpstate

flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc pni monitor cx16 popcnt
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse
3dnowprefetch osvw ibs ts ttp tm stc 100mhzsteps hwpstate

flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc pni monitor cx16 popcnt
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse
3dnowprefetch osvw ibs ts ttp tm stc 100mhzsteps hwpstate

Here's what is in /proc/cpuinfo:

======================================================

[root@grp-01-10-01 MX_1]# cat /proc/cpuinfo

processor       : 0

vendor_id       : AuthenticAMD

cpu family      : 16

model           : 2

model name      : AMD Phenom(tm) 9850 Quad-Core Processor

stepping        : 3

cpu MHz         : 1250.000

cache size      : 512 KB

physical id     : 0

siblings        : 4

core id         : 0

cpu cores       : 4

fdiv_bug        : no

hlt_bug         : no

f00f_bug        : no

coma_bug        : no

fpu             : yes

fpu_exception   : yes

cpuid level     : 5

wp              : yes

flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc pni monitor cx16 popcnt
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse
3dnowprefetch osvw ibs ts ttp tm stc 100mhzsteps hwpstate

bogomips        : 2512.94

clflush size    : 64

processor       : 1

vendor_id       : AuthenticAMD

cpu family      : 16

model           : 2

model name      : AMD Phenom(tm) 9850 Quad-Core Processor

stepping        : 3

cpu MHz         : 1250.000

cache size      : 512 KB

physical id     : 0

siblings        : 4

core id         : 2

cpu cores       : 4

fdiv_bug        : no

hlt_bug         : no

f00f_bug        : no

coma_bug        : no

fpu             : yes

fpu_exception   : yes

cpuid level     : 5

wp              : yes

flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc pni monitor cx16 popcnt
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse
3dnowprefetch osvw ibs ts ttp tm stc 100mhzsteps hwpstate

bogomips        : 2512.94

clflush size    : 64

processor       : 2

vendor_id       : AuthenticAMD

cpu family      : 16

model           : 2

model name      : AMD Phenom(tm) 9850 Quad-Core Processor

stepping        : 3

cpu MHz         : 1250.000

cache size      : 512 KB

physical id     : 0

siblings        : 4

core id         : 1

cpu cores       : 4

fdiv_bug        : no

hlt_bug         : no

f00f_bug        : no

coma_bug        : no

fpu             : yes

fpu_exception   : yes

cpuid level     : 5

wp              : yes

flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc pni monitor cx16 popcnt
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse
3dnowprefetch osvw ibs ts ttp tm stc 100mhzsteps hwpstate

bogomips        : 2512.94

clflush size    : 64

processor       : 3

vendor_id       : AuthenticAMD

cpu family      : 16

model           : 2

model name      : AMD Phenom(tm) 9850 Quad-Core Processor

stepping        : 3

cpu MHz         : 1250.000

cache size      : 512 KB

physical id     : 0

siblings        : 4

core id         : 3

cpu cores       : 4

fdiv_bug        : no

hlt_bug         : no

f00f_bug        : no

coma_bug        : no

fpu             : yes

fpu_exception   : yes

cpuid level     : 5

wp              : yes

flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc pni monitor cx16 popcnt
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse
3dnowprefetch osvw ibs ts ttp tm stc 100mhzsteps hwpstate

bogomips        : 2512.94

clflush size    : 64

======================================================

But I notice from dmesg that it reports different capability for cpus
(notice the bogomips):

======================================================

CPU0: AMD Phenom(tm) 9850 Quad-Core Processor stepping 03

Booting processor 1/1 ip 4000

CPU 1 irqstacks, hard=c07ba000 soft=c079a000

Initializing CPU#1

Calibrating delay using timer specific routine.. 5022.86 BogoMIPS
(lpj=2511432)

CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)

CPU: L2 Cache: 512K (64 bytes/line)

CPU 1(4) -> Core 2

Intel machine check architecture supported.

Intel machine check reporting enabled on CPU#1.

CPU1: AMD Phenom(tm) 9850 Quad-Core Processor stepping 03

Booting processor 2/2 ip 4000

CPU 2 irqstacks, hard=c07bb000 soft=c079b000

Initializing CPU#2

Calibrating delay using timer specific routine.. 5022.84 BogoMIPS
(lpj=2511421)

CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)

CPU: L2 Cache: 512K (64 bytes/line)

CPU 2(4) -> Core 1

Intel machine check architecture supported.

Intel machine check reporting enabled on CPU#2.

CPU2: AMD Phenom(tm) 9850 Quad-Core Processor stepping 03

Booting processor 3/3 ip 4000

CPU 3 irqstacks, hard=c07bc000 soft=c079c000

Initializing CPU#3

Calibrating delay using timer specific routine.. 5022.85 BogoMIPS
(lpj=2511426)

CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)

CPU: L2 Cache: 512K (64 bytes/line)

CPU 3(4) -> Core 3

Intel machine check architecture supported.

Intel machine check reporting enabled on CPU#3.

CPU3: AMD Phenom(tm) 9850 Quad-Core Processor stepping 03

Total of 4 processors activated (20094.44 BogoMIPS).

ENABLING IO-APIC IRQs

..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1

Brought up 4 CPUs

sizeof(vma)=84 bytes

sizeof(page)=32 bytes

sizeof(inode)=340 bytes

sizeof(dentry)=132 bytes

sizeof(ext3inode)=492 bytes

sizeof(buffer_head)=56 bytes

sizeof(skbuff)=176 bytes

sizeof(task_struct)=3728 bytes

CPU0 attaching sched-domain:

 domain 0: span 0000000f

  groups: 00000001 00000002 00000004 00000008

CPU1 attaching sched-domain:

 domain 0: span 0000000f

  groups: 00000002 00000004 00000008 00000001

CPU2 attaching sched-domain:

 domain 0: span 0000000f

  groups: 00000004 00000008 00000001 00000002

CPU3 attaching sched-domain:

 domain 0: span 0000000f

  groups: 00000008 00000001 00000002 00000004

net_namespace: 548 bytes

Booting paravirtualized kernel on bare hardware

Time: 16:44:18  Date: 05/06/08

======================================================

[root@grp-01-10-01 MX_1]# modprobe -l | grep -i kvm

/lib/modules/2.6.25-14.fc9.i686/kernel/arch/x86/kvm/kvm-amd.ko

/lib/modules/2.6.25-14.fc9.i686/kernel/arch/x86/kvm/kvm-intel.ko

/lib/modules/2.6.25-14.fc9.i686/kernel/arch/x86/kvm/kvm.ko

======================================================

# dmesg | grep -i kvm

#

======================================================

I see no messages in dmesg about any problem related to kvm.  The cpu
speed looks to be half in /proc/cpuinfo as compared with dmesg.  That's
a little strange.

Regards,

Gerry

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