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Re: [Xen-users] poor I/O with xen kernel
More info about this:
filename:
/lib/modules/3.13.0-32-generic/kernel/drivers/scsi/megaraid/megaraid_sas.ko
description: LSI MegaRAID SAS Driver
author: megaraidlinux@xxxxxxx
version: 06.700.06.00-rc1
this is the kernel and the driver version on both Xen and Non-Xen
version of Ubuntu Server
And this is the Xen kernel and driver version on CentOS
filename:
/lib/modules/3.13.0-32-generic/kernel/drivers/scsi/megaraid/megaraid_sas.ko
description: LSI MegaRAID SAS Driver
author: megaraidlinux@xxxxxxx
version: 06.700.06.00-rc1
license: GPL
and the Intel Raid controller version:
82:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID
SAS-3 3108 [Invader] (rev 02)
......
The Areca Raid Version is:
02:00.0 RAID bus controller: Areca Technology Corp. ARC-1880 8/12
port PCIe/PCI-X to SAS/SATA II RAID Controller (rev 01)
the Xen and non-xen Kernels are the same as above
is any body else is having this issue ?
Cheers,
Niki
On 27/01/15 13:28, Niki Vasilev wrote:
Hi
there,
I have some issues with Xen kernel on Ubuntu Server (latest) and
CentOS 6
I am using Intel RAID controller, testing with fio.
On CentOS 6 I am getting ~14k iops with Xen Kernel and with the
generic one I am getting ~15k (not much more ...). I played with
drivers, changed the scheduler, etc....nothing helped.
On Ubuntu Server with the default kernel and driver I am getting
~21k iops and when I boot with xen kernel I am getting ~10k
....its the same kernel version and same driver ...
On the same machine with Areca raid controller with CentOS 6 and
xen kernel I am getting ~26k iops
My question is, how can I modified the kernel or what I have to
install/config to solve this ...
Cheers,
Niki
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