Justin,
Thanks for providing the information.
I would like to add the following information:
1. total CPU utilization (host + VM)
> 4401 qemu 20 0 6038648 2.309g 22968 S 100.0 7.4 43:24.27
qemu-system-x86
> 4422 root 20 0 0 0 0 R 83.2 0.0 0:22.90
vhost-4401
This indicates about 1.8 CPU cores were assigned for the Linux VM iperf
receiver.
> 24788 root 20 0 528708 16148 16064 R 100.0 0.0 0:04.35 ukvm-bin
On the other hand, the MirageOS iperf server was running with just 1 CPU core
in total.
2. Memory size assigned(used)
The above results indicate that the Linux VM was using 2.3G physical memory
space,
but the MirageOS VM was running with 512MB physical memory size(this size is
fixed in Solo5/ukvm).
I guess that the above two points and networking implementation difference
between Linux and MirageOS affected the performance difference you observed.
Kind regards,
--
Takayuki Imada
On 10/24/17 9:41 PM, Justin Cinkelj wrote:
From my first mail:
ubuntu VM:
iperf -c 192.168.122.20 -t10
------------------------------------------------------------
Client connecting to 192.168.122.20, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.122.1 port 52674 connected with 192.168.122.20 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 52.9 GBytes 45.4 Gbits/sec
top:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4401 qemu 20 0 6038648 2.309g 22968 S 100.0 7.4 43:24.27
qemu-system-x86
4422 root 20 0 0 0 0 R 83.2 0.0 0:22.90 vhost-4401
24759 justin_+ 20 0 165812 1892 1728 S 51.5 0.0 0:03.91 iperf
I left the -P (number of parallel client threads to run) at default value -
which is 1.
KVM VM used 100% (1 whole cpu core), and the corresponding vhost process used
80% of CPU core.
So I did run test in single-thread mode for both Linux VM and MirageOS.
On XEN, xentop also showed 100% cpu usage for the MirageOS VM.
Thank you for answering
Justin
On 10/24/2017 02:30 PM, Takayuki Imada wrote:
Hi,
This is similar to what I observed previously, not so surprising.
But, I want you to check how many CPU cores are totally utilized on both the
Linux VM and MirageOS configurations.
I guess only 1 CPU core are utilized on the MirageOS configuration whereas
multiple CPU cores are utilized on the Linux configuration.
Kind regards,
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