Experimental Physics and
Industrial Control System

Matt Newville <[email protected]> · Wed, 13 Apr 2011 09:23:43 -0500

Hi Ritesh,

> I have following feedback during testing of pyepics library
>
> 1. I also realise pyepics documentation (chapter 5, pg 41) should have
> EPICS_CA_MAX_ARRAY_BYTES instead of EPICS_CA_MAX_ARRAY_SIZE.

Sorry -- apparently I copied the same mistake.  I fixed the docs.

> 2. my plateform is RHEL 5.5 65 bit, python3.2

Great!  Glad to know it works with 64-bit and python 3.2 on linux.

> 3. during running test , I have changed
>
> >> print x
>
> to
>
>>> print (x)
>
> inline with python3.

Ah, sorry.  I'll look for and change all those as well.  There are no
bare "print" statements in the actual code, but it's easy for these to
creep into the tests.

> I am also interested to know how far we can go with the array size in EPICS
> and PyEPICS interface.

There is no explicit limit on array size that doesn't exist in EPICS.
With Area Detector, it's not unusual for us to be transferring 8Mb
arrays.   I don't know what the largest verified array size is, or how
EPICS would deal with arrays approaching 2Gb.

Cheers,

--Matt Newville

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System