Process
Def : series of action
Process control block PCB
- Process state
- Program counter
- Cpu register
- Cpu scheduling info
- Memory management info
- Accounting info
- i/o status info

process comm
- independent pr – other cant, not share
- cooperation pr
- - reason
- - info share
- Comput speed
- Better design of app

IPC
- Cooperation
- Share memory

Cpu scheduling
Def : run at all time. Max cpu util

Criteria
- Cpu utilization – max
- Throughput - max
- Turnaround time - mini
- Waiting time - mini
- Response time - mini

Cluster
Def : Parallel processing system
- Fail or High : no downtime
- Load balancing : same as fail-over but load more balancing
- High performance : extreme performance
- - Beowulf : only have desktop

benefit
1. inexpensive : cost less than supercomputer
2. scalability : easy to expend
3. maintenance :
4. high perform : efficiently operation
5. great capacity : solve large problem size


parallel
#pragma omp parallel : declare parallel programing
#pragma omp private(var1) : var1 is declared to each thread
#pragma omp for : divides loop
#pragma omp critical : executed by one threadata time
#pragma omp barrier : wating for every thread to finish
#pragma omp master : only by master
#pragma omp single : no need to be master
#pragma omp shared(var1,var2…) : share the var

Algorithm : Set of instructions
Serial Algorithm : sequentially
Parallel algorithm : executedata time
- Why? : to solve with large data

4 classes computer
- SISD : serial algorithm
- MISD : n process do one task
- SIMD : one process n task
- MIMD : multiprocessors


월요일에 A 받고 온다 ㅋㅋㅋ