Re: [Xen-users] Dom0 with delay but DomU OK

[Igor Chubin <igor@xxxxxxx>]

On Sa, MÃr 22, 2008 at 12:51:14 -0300, Valter Douglas LisbÃa Jr. wrote:
> 
> Hi folk,
> 

Hello Valter,

> 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?


1) check your domain 0 dns config.
2) check that /etc/hosts is ok
3) check that lo interface is up


> 
> 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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> http://lists.xensource.com/xen-users

-- 
WBR, i.m.chubin


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