[Xen-users] Dom0 with delay but DomU OK

["Valter Douglas LisbÃa Jr." <douglas@xxxxxxxxxxxxx>]

Hi folk,

In this week, I migrate three Slackware VPN/Firewall/Proxy machines of a 
customer to a LFS-based with Xen and I notice a delay on dom0 of the central 
machine, The domu is fine and very fast (my customer notice a velocity 
increase to access the VPN points and slightly for Internet access).

In dom0 a vim command delays 1-3 seconds to open a file, in domu is practicaly 
instantaneous, any other program has the increased on hypervisor, including 
the xm command. The VPN clients (and any other machine I isntalled this 
distro) don't show any delay. 

I think this is a hardware issue since this is the only machine with this 
configuration. The other VPN points has AMD based arch.

Any ideas?

kernel-2.6.18.8 (dom0 and domu)
xen 1.3.1
Everything compiled to Pentium4 (in this machine case)

Hardware:

SATA 80GB.

/proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 4
model name      : Intel(R) Pentium(R) 4 CPU 2.80GHz
stepping        : 1
cpu MHz         : 2799.914
cache size      : 1024 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 5
wp              : yes
flags           : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 clflush 
dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc pni monitor ds_cpl cid 
xtpr
bogomips        : 5604.39

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 15
model           : 4
model name      : Intel(R) Pentium(R) 4 CPU 2.80GHz
stepping        : 1
cpu MHz         : 2799.914
cache size      : 1024 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 5
wp              : yes
flags           : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 clflush 
dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc pni monitor ds_cpl cid 
xtpr
bogomips        : 5604.39

lspci
00:00.0 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host 
Bridge
00:00.1 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host 
Bridge
00:00.2 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host 
Bridge
00:00.3 Host bridge: VIA Technologies, Inc. PT890 Host Bridge
00:00.4 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host 
Bridge
00:00.7 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host 
Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
00:09.0 Ethernet controller: Realtek Semiconductor Co., Ltd. 
RTL-8139/8139C/8139C+ (rev 10)
00:0f.0 IDE interface: VIA Technologies, Inc. VIA VT6420 SATA RAID Controller 
(rev 80)
00:0f.1 IDE interface: VIA Technologies, Inc. 
VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 
Controller (rev 81)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 
Controller (rev 81)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 
Controller (rev 81)
00:10.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 
Controller (rev 81)
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge 
[KT600/K8T800/K8T890 South]
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 
AC97 Audio Controller (rev 60)
00:11.6 Communication controller: VIA Technologies, Inc. AC'97 Modem 
Controller (rev 80)
00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 78)
01:00.0 VGA compatible controller: VIA Technologies, Inc. UniChrome Pro IGP 
(rev 01)

free -m (total memory on system is 1GB)
             total       used       free     shared    buffers     cached
Mem:           128        103         25          0         36         38
-/+ buffers/cache:         28         99
Swap:          258          0        258

-- 
Valter Douglas LisbÃa Jr.
SÃcio-Diretor
Trenix - IT Solutions
"Nossas IdÃias, suas SoluÃÃes!"
www.trenix.com.br
contato@xxxxxxxxxxxxx
Tel. +55 19 3402.2957
Cel. +55 19 9183.4244

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