<s>
Multiple	B-General_Concept
Asynchronous	I-General_Concept
Periodic	I-General_Concept
Polling	I-General_Concept
(	O
MAPP	O
)	O
is	O
a	O
synchronization	O
method	O
used	O
primarily	O
in	O
Computer	O
Science	O
.	O
</s>
<s>
This	O
method	O
is	O
similar	O
to	O
periodic	O
polling	B-General_Concept
.	O
</s>
<s>
In	O
MAPP	O
,	O
two	O
or	O
more	O
periodic	O
polling	B-General_Concept
handlers	O
(	O
such	O
as	O
using	O
multiple	O
timers	O
)	O
are	O
applied	O
to	O
form	O
a	O
single	O
aggregate	O
polling	B-General_Concept
scheme	O
.	O
</s>
<s>
By	O
changing	O
the	O
combination	O
of	O
periods	O
and	O
phase	O
shifts	O
,	O
MAPP	O
can	O
optimize	O
corner	O
cases	O
which	O
are	O
problematic	O
to	O
conventional	O
periodic	O
polling	B-General_Concept
.	O
</s>
<s>
MAPP	O
is	O
mainly	O
used	O
when	O
the	O
temporal	O
resolution	O
of	O
conventional	O
periodic	O
polling	B-General_Concept
is	O
not	O
high	O
enough	O
for	O
the	O
particular	O
application	O
.	O
</s>
<s>
For	O
example	O
,	O
5	O
timers	O
with	O
identical	O
polling	B-General_Concept
period	O
but	O
1/5	O
cycle	O
phase	O
shift	O
from	O
the	O
previous	O
one	O
may	O
be	O
used	O
together	O
to	O
increase	O
the	O
polling	B-General_Concept
rate	I-General_Concept
to	O
5	O
times	O
of	O
that	O
which	O
could	O
be	O
achieved	O
with	O
a	O
single	O
timer	O
.	O
</s>
