Abysmal network throughput under Linux and PD15

Discussion in 'Linux Guest OS Discussion' started by zslg01, Sep 10, 2019.

  1. zslg01

    zslg01 Bit Poster

    Messages:
    7
    Has anyone else seen terrible (~15mb/sec) throughput for Linux VMs (Mint, Manjaro) under PD15? Doesn't seem to happen in VMWare or PD14 or VirtualBox.
     
  2. Alexander Haltman

    Alexander Haltman Parallels Developers

    Messages:
    103
    How do you measure throughput?
     
  3. zslg01

    zslg01 Bit Poster

    Messages:
    7
    Bytes per second as measured by a clean install of linux Mint 19.2 as it downloads the first set up software updates.
     
  4. Alexander Haltman

    Alexander Haltman Parallels Developers

    Messages:
    103
    It is a bit complex test. When you download something from internet and store it on disk you are testing not only VM's network performance but also your internet connection performance (it could vary greatly over time) and disk performance as well.

    You can check internet connection speed with tool like speedtest.
    Or you can check speed of network between you VM and host by tool like iperf or
    simple using ssh (something like this: pv < /dev/zero | ssh 10.211.55.2 'cat > /dev/null' )
     
  5. zslg01

    zslg01 Bit Poster

    Messages:
    7
    I understand - I spent 30+ years doing network design, maintenance, and management.
    I have also used the - "Its not us it must be the network" line :)
    I have found that real life examples are a much better test of real life issues.
    In this case I notice about a 10% difference in the time needed to pull all the updates for Linux Mint 19.2 as installed from an iso image when compared to VMware (Parallels takes longer).
    I also have Parallels Access up (available but no connections made) - could that be interference ?
    I'll run you some speed tests and ship them to you - VMware, VirtualBox, and Parallels - all on the same MacOS and same laptop.
    I'll hook up via ethernet to eliminate WiFi issues.
    Should I open a problem with Parallels?
     
  6. Alexander Haltman

    Alexander Haltman Parallels Developers

    Messages:
    103
    Yes. If you have an issue and want we have fix it - it is better to call technical support.
    Support will ask you to collect problem report and some other details about issue and may be do remote session with you to check problem by themselves (the latter is not possible to do through the forum).
     

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