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Practical #2

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dd40b3f
Update README.md
Jan 14, 2020
3276d79
Lab 1
Feb 14, 2020
a9fb7bd
commit lab 4
May 2, 2020
b0f5e70
Commit lab 5
May 2, 2020
2132b30
Commit lab 7
May 2, 2020
8151ab8
Commit lab 8
May 2, 2020
49b2485
Commit lab 9
May 2, 2020
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46 changes: 46 additions & 0 deletions 01.report.shell.commands.txt
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root@Admin:~# echo hello word
hello word
root@Admin:~# passwd
New password:
Retype new password:
passwd: password updated successfully
root@Admin:~# date
Tue 14 Jan 2020 05:16:05 AM EST
root@Admin:~# hostname
Admin
root@Admin:~# arch
x86_64
root@Admin:~# uname -a
Linux Admin 5.3.0-kali3-amd64 #1 SMP Debian 5.3.15-1kali1 (2019-12-09) x86_64 GNU/Linux
root@Admin:~# dmesg
[37621.154873] [drm] ring test on 3 succeeded in 4 usecs
[37621.154881] [drm] ring test on 4 succeeded in 4 usecs
[37621.330603] [drm] ring test on 5 succeeded in 2 usecs
[37621.330608] [drm] UVD initialized successfully.
[37621.330669] [drm] ib test on ring 0 succeeded in 0 usecs
[37621.330732] [drm] ib test on ring 1 succeeded in 0 usecs
[37621.330780] [drm] ib test on ring 2 succeeded in 0 usecs
[37621.330814] [drm] ib test on ring 3 succeeded in 0 usecs
[37621.330846] [drm] ib test on ring 4 succeeded in 0 usecs
[37622.009224] [drm] ib test on ring 5 succeeded
root@Admin:~/Desktop# uptime
05:19:26 up 11:41, 1 user, load average: 0.62, 0.57, 0.57
root@Admin:~/Desktop# who am i
root@Admin:~/Desktop# whoami
root
root@Admin:~/Desktop# who
root tty7 2020-01-13 17:39 (:0)
root@Admin:~/Desktop# id
uid=0(root) gid=0(root) groups=0(root)
root@Admin:~/Desktop# last
root tty7 :0 Mon Jan 13 17:39 still logged in

wtmp begins Fri Dec 20 13:57:13 2019
root@Admin:~/Desktop# finger
Login Name Tty Idle Login Time Office Office Phone
root root tty7 11:41 Jan 13 17:39 (:0)
root@Admin:~/Desktop# w
05:20:03 up 11:41, 1 user, load average: 0.72, 0.59, 0.58
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root tty7 :0 17:39 11:41m 47:27 47:27 /usr/lib/xorg/Xorg :0 -seat seat0 -au

18 changes: 18 additions & 0 deletions 02.report.pipe.txt
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root@Admin:~# ls | grep list
root@Admin:~# wc -l /etc/passwd
54 /etc/passwd
root@Admin:~# free
total used free shared buff/cache available
Mem: 8136024 2028432 4716216 348744 1391376 5454432
Swap: 8300540 12272 8288268

root@Admin:~# cat /proc/cpuinfo | grep core
core id : 0
cpu cores : 2
core id : 1
cpu cores : 2

root@Admin:~/Downloads# find *.jpg | wc -l
8


16 changes: 16 additions & 0 deletions 03.process.shell.txt
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root@Admin:~# ps -A
PID TTY TIME CMD
1 ? 00:00:02 systemd
2 ? 00:00:00 kthreadd
3 ? 00:00:00 rcu_gp
4 ? 00:00:00 rcu_par_gp
6 ? 00:00:00 kworker/0:0H-kblockd
9 ? 00:00:00 mm_percpu_wq
10 ? 00:00:00 ksoftirqd/0
root@Admin:~# wireshark
root@Admin:~# ps -A | grep wireshark
18981 pts/1 00:00:00 wireshark
root@Admin:~# kill -STOP 18981
root@Admin:~# kill -CONT 18981
root@Admin:~# kill -KILL 18981

35 changes: 35 additions & 0 deletions 04.practical.work.fork.exec.c
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>

int main(int argc, char const *argv[]) {
printf("Main before fork()\n");
int pid = fork();

if (pid == 0){
int pid2 = fork();

if (pid2 == 0){
printf("I am child after fork(), launching ps -ef\n");
char *args[] = {"/bin/ps", "-ef", NULL};
execvp("/bin/ps", args);
}
else {
wait(NULL);
printf("I am parent after fork(), child is %d\n", pid2);
}

printf("I am child after fork(), launching free -h\n");
char *args[] = {"free", "-h", NULL};
execvp("free", args);
}
else {
wait(NULL);
printf("I am parent after fork(), child is %d\n", pid);
}
printf("Complete!\n");
return 0;

}
14 changes: 14 additions & 0 deletions 05.report.proccess.scheduler.txt
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/proc/sched_debug

vdhieu@Admin:~$ cat /proc/sched_debug | grep -e systemd | awk '{print $5}'
120
2746650
1014
1642
35074

/proc/<processID>/sched

vdhieu@Admin:~$ cat /proc/1/sched | grep nr_switches
nr_switches : 2762212

6 changes: 6 additions & 0 deletions 07.report.thread.info.txt
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vdhieu@Admin:~$ ps -o nlwp 59481
58

vdhieu@Admin:~$ ls /proc/59481/task | wc -w
56

44 changes: 44 additions & 0 deletions 08.report.works.pthread.c
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#include <stdio.h>
#include <math.h>
#include <pthread.h>

void *primeCalc()
{
int n = 0;
for (int i = 2; i < 1000000; i++)
{
int isPrime = 1;
for (int j = 2; j < sqrt(i); j++)
if (i % j == 0)
{
isPrime = 0;
break;
}
if (isPrime == 1) printf("Prime number %d: %d\n",n++,i);
}
}
void *fiboCalc()
{
printf("Fibo number 1:1\n");
printf("Fibo number 2:1\n");
int first = 2, sec = 3, n = 3;
while (first < 1000000 && sec < 1000000)
{
printf("Fibo number %d:%d\n", n++,first);
printf("Fibo number %d:%d\n", n++,sec);
first += sec;
sec += first;
}

}

int main()
{
pthread_t prime_t, fibo_t;
pthread_create(&prime_t, NULL, primeCalc, NULL);
pthread_create(&fibo_t, NULL, fiboCalc, NULL);
pthread_join(prime_t, NULL);
pthread_join(fibo_t, NULL);
return 0;
}
80 changes: 80 additions & 0 deletions 09.report.scheduling.txt
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os2020/09.report.scheduling.txt
@gdxpub gdxpub Add parts of answer for exercise 9
f11cc67 on Mar 31
50 lines (42 sloc) 3.06 KB

+-------------------------------------------+
| |
p1 | 8ms |
| |
+-------------------------------------------+

+---------------------+
| |
p2 | 4ms |
| |
+---------------------+

+------+
| |
p3 | 1ms |
| |
+------+

+--------------------------+
| |
p4 | 5ms |
| |
+--------------------------+

+-------------------------------------------+---------------------+------+--------------------------+
| | | | |
FCFS | 8ms | 4ms | 1ms | 5ms | 0, 8-0.4, 12-1, 13-1.3 ms
| | | | |
+-------------------------------------------+---------------------+------+--------------------------+

+-------------------------------------------+------+---------------------+--------------------------+
| | | 1ms) | |
SJF | 8ms | 1ms | 4ms | 5ms | 0, 9-0.4, 8-1, 13-1.3ms
| | | | |
+-------------------------------------------+------+---------------------+--------------------------+

+--+---+------+--------------------+---------------------------+-------------------------------------+
| | | | | | |
SRTF |p1|p2 | p3 | p2 | p4 | p1 | (0.6+1+3.4+5), (0+1), 0, (5.4-1.3)ms
| | | | | | |
+--+---+------+--------------------+---------------------------+-------------------------------------+
0.4 0.6 1ms 3.4ms 5ms 7.6ms

+--+---+--+------+------+------+----+------+------+------+------+------+------+--+
| | | | | | | | | | | | | | |
RR |p1|p2 |p3| p4 | p1 | p2 |p3 | p1 | p2 | p4 | p1 | p2 | p4 |p2|
| | | | | | | | | | | | | | |
+--+---+--+------+------+------+----+------+------+------+------+------+------+--+
.4 .6 .3 1ms 1 1 .7 1 1 1 1 1 1 .4

4 changes: 2 additions & 2 deletions README.md
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Expand Up @@ -9,6 +9,6 @@ Students are expected to:
Student Info
=========================

* Student Name: *Put your name here*
* Student ID: *Put your ID here*
* Student Name: Vũ Đức Hiếu
* Student ID: BI9-102