[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] DomU vs Dom0 performance.
Please find my response inline.
Thank you, Sushrut. On 1 October 2013 10:05, Felipe Franciosi <felipe.franciosi@xxxxxxxxxx> wrote:
kernel = "hvmloader" builder='hvm' memory = 4096 name = "ArchHVM" vcpus=8 disk = [ 'phy:/dev/sda5,hda,w', 'file:/root/dev/iso/archlinux.iso,hdc:cdrom,r' ]
device_model = 'qemu-dm' boot="c" sdl=0 xen_platform_pci=1 opengl=0 vnc=0 vncpasswd='' nographic=1 stdvga=0
serial='pty'
kernel information on dom0 is : Linux localhost 3.5.0-IDD #5 SMP PREEMPT Fri Sep 6 23:31:56 UTC 2013 x86_64 GNU/Linux
on domU is : Linux domu 3.5.0-IDD-12913 #2 SMP PREEMPT Sun Dec 9 17:54:30 EST 2012 x86_64 GNU/Linux
My bad. I have changed it to /dev/null.
Even though I am using a 5G of img, read operations executed are of size 1G only. Also lm_benchmark doesn't involve any read/writes to this ".img", still the results I am getting are better on domU when measured with lm micro benchmarks.
Even though a single request is completing in 10us, total time required to complete all requests (5000000) is 17 & 13 seconds for dom0 and domU respectively.
(I forgot to mention that I have a SSD installed on this machine)
But looking at results of lat_syscall and bw_mem microbenchmarks, it shows that syscalls are executed faster in domU and memory bandwidth is more in domU.
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