RE: TSM on Linux hosted on i5 outperforms TSM running on i5/os PASE.

PASE doesn't run on top of OS/400.  It runs beside OS/400.

The diagram in the "Fortress Rochester" books shows the following:

|-------------------||-----------------|
| OS/400 PASE       || OS/400 ILE      |
|    Applications   ||   Applications  |
|   |---------------||-------------|   |
|   | PASE Env.     || OS/400      |   |
|   |               ||  Operating  |   |
|   | AIX Shared    ||  System     |   |
|   |  Libraries    ||             |   |
|   |               ||             |   |
|   |---------------||-----------------|
|   |  syscall      ||Machine Interface|
|   |---------------||-----------------|
|   |----------------------------------|
|   |        SLIC  Kernel              |
|   |----------------------------------|
|-------------------||-----------------|
| PowerPC Mode      || AS/400 mode     |
|  32/64 bit        ||   64bit         |
|-------------------||-----------------|
|--------------------------------------|
|    Hardware                          |
|--------------------------------------|

HTH,


Charles Wilt
--
iSeries Systems Administrator / Developer
Mitsubishi Electric Automotive America
ph: 513-573-4343
fax: 513-398-1121
  

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx 
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Chris Bipes
Sent: Monday, June 12, 2006 1:08 PM
To: Midrange Systems Technical Discussion
Subject: RE: TSM on Linux hosted on i5 outperforms TSM 
running on i5/os PASE.

PASE my be binary compatible but it still runs on TOP of 
OS400, thus the
commands, drivers, etc. have to be converted from Unix to 
OS400 to work.
Any emulation environment in my opinion is interpretive.

Christopher Bipes
Information Services Director
CrossCheck, Inc.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Wilt, Charles
Sent: Monday, June 12, 2006 9:56 AM
To: Midrange Systems Technical Discussion
Subject: RE: TSM on Linux hosted on i5 outperforms TSM 
running on i5/os
PASE.

Not really.

PASE isn't an interpreter because there isn't anything to interpret.
Remember, the i and p series run on the same hardware.

From the "Fortress Rochester" book:

"PASE uses the processor's ability to switch between AS/400 
and RS/6000
mode to execute an application in the PASE runtime. <...> 
Performance is
equivalent to a comparable pSeries or RS/6000 system running the same
application."

The issue appears to be differences in the device drivers required for
sharing in an OS-400/PASE environment versus a standalone AIX/Linux
environment.

Perhaps Rob could comment, but I imagine that with TSM in 
PASE, as long
as TSM wasn't using the tape drive OS/400 could use it with nothing
special to do.  Whereas with TSM in a Linux partition, the tape drive
would have to be moved from the Linux partition to the OS/400 before
OS/400 could use it.

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