|
|
|
|
|
|
|
|
|
ä |
Each
process executes
|
|
at
nonzero speed but
|
|
|
no
assumption on the
|
|
|
relative
speed of n
|
|
|
processes
|
|
|
ä |
General
structure of a
|
|
|
process:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ä |
many
CPU may be
|
|
|
present
but memory
|
|
|
hardware
prevents
|
|
|
simultaneous
access to
|
|
the
same memory
|
|
|
location
|
|
|
ä |
No
assumption about
|
|
|
order
of interleaved
|
|
|
execution
|
|
|
ä |
For
solutions: we need
|
|
|
to
specify entry and
|
|
|
exit
sections
|
|
|
|