Re: [Xen-users] The bottleneck of using multinetwork card?

[ma qiang <maqiang1984@xxxxxxxxx>]

I have tried the methods as the content of this link.

But when I trye: # [root@test boot]# mkinitrd -v initrd-2.6.18-194.11.1.el5xen.img 2.6.18-194.11.1.el5xen   prints as belows:

Creating initramfs

Looking for deps of module ehci-hcd

Looking for deps of module ohci-hcd

Looking for deps of module uhci-hcd

Looking for deps of module ext3: jbd 

Looking for deps of module jbd

Looking for driver for device sda2

Looking for deps of module pci:v00001000d00000060sv00001028sd00001F0Cbc01sc04i00: scsi_mod megaraid_sas 

Looking for deps of module scsi_mod

Looking for deps of module sd_mod: scsi_mod 

Looking for deps of module megaraid_sas: scsi_mod 

Looking for deps of module pci:v000010B5d00008518sv00000000sd00000000bc06sc04i00: shpchp 

Looking for deps of module shpchp

Looking for deps of module pci:v000010B5d00008518sv00000000sd00000000bc06sc04i00: shpchp 

Looking for deps of module pci:v00001166d00000144sv00000000sd00000000bc06sc04i00: shpchp 

Looking for deps of module sata_svw: scsi_mod libata 

Looking for deps of module libata: scsi_mod 

Looking for deps of module xen-vbd

No module xen-vbd found for kernel 2.6.18-194.11.1.el5xen, aborting.

That's why?  

I have yum installed xen 3.4.3 from http://www.gitco.de/repo/xen3.4.3/, and based on centos 5.4. 

Best Wishes!

On Mon, Sep 6, 2010 at 3:26 PM, ma qiang <maqiang1984@xxxxxxxxx> wrote:

On Mon, Sep 6, 2010 at 3:12 PM, Fajar A. Nugraha <fajar@xxxxxxxxx> wrote:

On Mon, Sep 6, 2010 at 1:57 PM, ma qiang <maqiang1984@xxxxxxxxx> wrote:

> 20% is the vm's utilization of cpu, not dom0's.
> My domU is hvm and centos linux.

HVM is known to have slower disk/network I/O.
Here are some things you could check:
- look at CPU performance on both dom0 and domU using a program that
can show individual CPU load (like htop). My guess is one CPU is at
100% utilization

I'm sure none CPU is at 100% utilization.  I double confirmed that. :)

 

- check to see if you're already using PV drivers. If not, using it
might increase throughput. See http://pastebin.com/fb6fe631 for
example (basically you need to make sure the correct modules are
loaded while others are blacklisted)
- Try using PV domU, and compare the results.

I don't know if I have already using PV drivers, I'm going to check it. Thanks a lot.
--
Fajar

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