Re: [MirageOS-devel] network performance question

[Justin Cinkelj <justin.cinkelj@xxxxxxx>]

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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