[Info-vax] Integrity i2, i4, i6 relative performance (was: Re: Large Qty of rx2800 i2 i4 & i6 in STOCK)

[Stephen Hoffman]

On 2019-04-20 21:39:05 +0000, Forster, Michael said:

> Forgive me for this loaded and variable outcome question. For your 
> customers, how significant have the x6 versus x2 chips been for real 
> applications and their experience and performance and potential issues 
> encountered.  I know that on paper the specifications seem to be 
> significant.

Some performance-related and feature-related reading:

http://www.connect-community.de/sites/default/files/05a%20Performance_i4_vs_i2.pdf 


https://www.realworldtech.com/poulson/

https://groups.google.com/d/msg/comp.os.vms/x-tpyt5P3tU/0kVI5lkUEwAJ

Integrity i2 Tukwila to Integrity i4 Poulson can be a nice performance jump.

There are some performance-related feature upgrades in i4 and i6 over 
i2, too.  Alignment fault handling improvements, and some out-of-order 
support, etc.

Integrity i4 Poulson and Integrity i6 Kittson seem to differ only in 
binning and in labeling.

A few select i6 processor bins are slightly faster than the fastest of 
i4.  IIRC, around ~15%.

Outside what arrives with the slightly faster clock on a few bins, i4 
and i6 performance differences are negligible.

If you're on i2, consider i4 or i6.  If you're already on i4 and not 
right on the edge, then i6 as your i4 ages out, and/or if you need the 
longest hardware-support window.

For i4, might want to look at more memory, or SSDs, or faster HBAs, 
etc., before i6.

YMMV, etc.

-- 
Pure Personal Opinion | HoffmanLabs LLC