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# tests caget (and so pv.get() and ca.get()) for "large arrays"
# especially for "slow networks".
# the 3 pvs listed here are:
# 13GEXMAP:mca1: 2048 ints (simple MCA record)
# GSE-PIL1:image1:ArrayData 94965 longs (Pilatus 100k)
# 13MARCCD1:image1:ArrayData 420000 ints (MAR165)
# obviously, you'll need to alter these names
#
# TIMEOUT sets the pend_io() time. If working with large
# arrays and/or slow networks, you may want to test for a
# suitable safe timeout.
import epics
import time
pvnames = ('13GEXMAP:mca1',
'GSE-PIL1:image1:ArrayData',
'13MARCCD2:image1:ArrayData',
)
TIMEOUT = 15.0 # Timeout in seconds
for name in pvnames:
t0 = time.time()
value = epics.caget(name, timeout=TIMEOUT)
dt = time.time()-t0
if value is None:
print( 'cannot get value for ', name)
else:
print( "%s: npts=%i, sum=%i, max=%i, time=%.3fs" % (name,
len(value),
value.sum(),
value.max(), dt))
print( 'done.')
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