1. Linux 202 Training Module
Program and Process

2. This presentation will cover the following topics
Thread
top  
ps details mem, cpu, etc

3. Thread
A thread of execution is often regarded as the smallest unit of processing that a scheduler works on.
Following are some of the major differences between the thread and the processes :
Processes do not share their address space while threads executing under same process share the address space.
Context switching between threads is fast as compared to context switching between processes

4. #include <pthread.h>
int pthread_create(pthread_t *restrict tidp, const pthread_attr_t *restrict attr, void *(*start_rtn)(void), void *restrict arg)

5. Top command
The top program provides a dynamic real-time view of a running system. It can display system summary information as well as a list of tasks currently being managed by the Linux kernel.
top
top - 10:28:24 up 4 days, 22:13, 4 users, load average: 0.00, 0.01, 0.05
Tasks: 219 total, 1 running, 217 sleeping, 0 stopped, 1 zombie
Cpu(s): 0.2%us, 0.2%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: k total, k used, k free, k buffers
Swap: k total, k used, k free, k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2494 netstorm m S :09.97 java
2588 root m 23m 1312 S :07.85 java
2867 root m 26m 1272 S :05.50 java
1 root S :00.87 init