Re: [Xen-users] Poor performance on bandwidth, Xen 4.0.1 kernel pvops 2.6.32.24

[Rémi BERNIER <R.BERNIER@xxxxxxxxxxx>]

Hello all,

I have tested on the new server XEN-B
with the default lenny install, kernel 2.6.26-2-amd64, i have the driver
bnx2 with version 1.7.5 and the result of iperf is perfect (average 900Mbits/sec
on bandwidth)
So I think is the version of driver
bnx2 (2.0.2) on the pvops kernel 2.6.32.24 who raises worries.
Someone have the same problem ? How
I can bypass this ?
Really thanks in advance for your answer
!!

For information, I'm on debian Lenny
5.0.6 with a Dell PowerEdge 2950

Rémi


Hello list, 

I have two differents installation Xen Hypervisor on two identical physical
server, on the same switch : 
The problem is on my new server (Xen 4.0.1 with pvops kernel 2.6.32.24),
I have bad performance on bandwidth 
I have test with a files copy and "iperf".
Result iperf average: 
                    
                     
             Transfert    
           Bandwidth
XEN-A -> Windows Physical:        1005 MBytes  
843 Mbits/sec 
XEN-B -> Windows Physical:        522 MBytes  
 438 Mbits/sec 
Windows Physical -> XEN-A:        477 MBytes  
399 Mbits/sec 
Windows Physical -> XEN-B:        175 MBytes  
146 Mbits/sec 

It's the same network card but on the new installation, the module bnx2
have a new version... 
Maybe i haven't activate or forget something... 
If you have an idea, I listen you !! Thanks in advance !
This is the details of two installations: 

XEN-A: 
- XEN 3.2.1 kernel 2.6.26-2-xen-amd64 
#xm info 
release                : 2.6.26-2-xen-amd64
version                : #1 SMP
Sun Jun 21 08:09:04 UTC 2009 
machine                : x86_64
nr_cpus                : 4
nr_nodes               : 1
cores_per_socket       : 2 
threads_per_core       : 1 
cpu_mhz                : 1995
hw_caps                : bfebfbff:20100800:00000000:00000140:0004e33d:00000000:00000001
total_memory           : 24570
free_memory            : 918
node_to_cpu            : node0:0-3
xen_major              : 3
xen_minor              : 2
xen_extra              : -1
xen_caps               : xen-3.0-x86_64
xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : unavailable
cc_compiler            : gcc version 4.3.1
(Debian 4.3.1-2) 
cc_compile_by          : waldi
cc_compile_domain      : debian.org
cc_compile_date        : Sat Jun 28 09:32:18 UTC 2008
xend_config_format     : 4 

#lspci -v 
09:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5708
Gigabit Ethernet (rev 12) 
        Subsystem: Dell Device 01b2
        Flags: bus master, 66MHz, medium devsel, latency
64, IRQ 16 
        Memory at f4000000 (64-bit, non-prefetchable)
[size=32M] 
        Capabilities: [40] PCI-X non-bridge device
        Capabilities: [48] Power Management version
2 
        Capabilities: [50] Vital Product Data <?>
        Capabilities: [58] Message Signalled Interrupts:
Mask- 64bit+ Queue=0/0 Enable- 
        Kernel driver in use: bnx2
        Kernel modules: bnx2 

#ethtool -i peth0 
driver: bnx2 
version: 1.7.5 
firmware-version: 2.9.1 
bus-info: 0000:05:00.0 


XEN-B: 
- XEN 4.0.1 kernel pvops 2.6.32.24 
#xm info 
release                : 2.6.32.24
version                : #1 SMP
Thu Oct 14 10:56:13 CEST 2010 
machine                : x86_64
nr_cpus                : 4
nr_nodes               : 1
cores_per_socket       : 2 
threads_per_core       : 1 
cpu_mhz                : 1995
hw_caps                : bfebfbff:20100800:00000000:00000940:0004e33d:00000000:00000001:00000000
virt_caps              : hvm
total_memory           : 24570
free_memory            : 10
node_to_cpu            : node0:0-3
node_to_memory         : node0:10
node_to_dma32_mem      : node0:9 
max_node_id            : 0
xen_major              : 4
xen_minor              : 0
xen_extra              : .1
xen_caps               : xen-3.0-x86_64
xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : unavailable
xen_commandline        : loglvl=all guest_loglvl=all
sync_console console_to_ring com1=19200,8n1 console=com1
cc_compiler            : gcc version 4.3.2
(Debian 4.3.2-1.1) 
cc_compile_by          : root
cc_compile_domain      : test.com 
cc_compile_date        : Thu Oct 14 03:37:34 EDT 2010
xend_config_format     : 4 

#ethtool -i peth0 
driver: bnx2 
version: 2.0.2 
firmware-version: 2.9.1 
bus-info: 0000:05:00.0 

#lspci -v 
09:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5708
Gigabit Ethernet (rev 12) 
        Subsystem: Dell Device 01b2
        Flags: bus master, 66MHz, medium devsel, latency
64, IRQ 1245 
        Memory at f4000000 (64-bit, non-prefetchable)
[size=32M] 
        Capabilities: [40] PCI-X non-bridge device
        Capabilities: [48] Power Management version
2 
        Capabilities: [50] Vital Product Data <?>
        Capabilities: [58] Message Signalled Interrupts:
Mask- 64bit+ Queue=0/0 Enable+ 
        Kernel driver in use: bnx2
        Kernel modules: bnx2_______________________________________________
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