[Simh] simh on OpenVMS

[Patrick Finnegan]

For #2, could you try comparing performance on VMS vs on Linux running as
the host OS on the same Itanium system?  Narrowing it down to one variable
at a time makes it easier to test differences.

You should be able to use a live CD on the Itanium system to test without
reinstalling the system.

Pat

On Thu, Sep 15, 2016 at 11:50 AM, gérard Calliet <
gerard.calliet at pia-sofer.fr> wrote:

> Hello,
>
> simh on OpenVMS again.
>
> 1) with the help of an Lan expert of VSI, I could use pcap on VMS on an
> Itanium i4... some time and it is again impossible. I will meet the VSI
> expert on OpenVMS bootcamp in Boston next week, anf I hope we will address
> this issue again. Any idea welcomed, of course. (It seems PCAP on VMS
> does'nt like larger frame with i4, because it is the only diference I can
> see between i2 and i4 Itanium servers, and it works on i2).
>
> 2) there is a very bad performance issue: same batch on a windows10 / i7
> platform six times faster than on an i2 / OpenVMS platform. I don't think
> it's a normal issue of windows or x86 being better than OpenVMS / italium
> i2. Something goes wrong somewhere. I gave a huge working set to the host
> process, and it is not doing paging, I tried Decram to avoid physical I/O,
> asynchronous I/O is enabled for simh (and the simh configuration is  the
> same on windows and on OpenVMS).
>
> Any help will be welcomed: ideas, tools for tracking,...
>
> Best regards,
>
> Gérard Calliet
>
>
>
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