In
<476996cbbe9af14285e09e63c370072a14f3684...@phxccrprd01.adprod.bmc.com>,
on 07/06/2011
at 01:31 PM, "Blaicher, Chris" <[email protected]> said:
>STARTIO is used when the user doesn't want to use a standard driver
>for some reason.
It's also used when you want to use a standard driver but have reasons
to avoid using EXCP[VR], e.g., performance.
>The 'standard' I/O interfaces include QSAM, BSAM, EXCP, Media Manger
>and EXCP/VR.
AFAIK the interface to MM is privileged and proprietary.
>QSAM is great if you don't want to mess with anything, but it has
>the highest overhead.
Having looked at the channel programs for BSAM and QSAM, I doubt that.
If anything, the average use of BSAM is probably more expensive than
the average use of QSAM. YMMV.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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