Le 15/09/2016 à 20:04, Mark Pizzolato a écrit :
Patrick's suggestion is a great one. Please explore that.
I think so. It'll take some time, because I'm going now to USA for VMS
bootcamp. I'll have talks there with VMS enthousiasts, and all I ear in
this list will be tried.
Go on suggest. And if you think about tools to get figures, I'll take.
Additionally, you're not necessarily making a fair comparison. To be
fair, you should compare the I2 system to an X86 system that was
shipping when that I2 system first shipped. I suspect you'll see
closer results.
I understand, but what is strange is when I have been able to use i4
(network did work at that time) the performance results where as bad as
with i2. So I was thinking there is some structural issue with Itanium
or with OpenVMS.
- Mark
On Sep 15, 2016 10:22 AM, Patrick Finnegan <[email protected]>
wrote:
>
> 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
<[email protected] <mailto:[email protected]>> 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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