#include<stdio.h>
#include<conio.h>
int main()
{
char p[10][5],temp[5];
int i,j,pt[10],wt[10],totwt=0,pr[10],temp1,n;
float avgwt;
clrscr();
printf("enter no of processes:");
scanf("%d",&n);
for(i=0;i<n;i++)
{
printf("enter process%d name:",i+1);
scanf("%s",&p[i]);
printf("enter process time:");
scanf("%d",&pt[i]);
printf("enter priority:");
scanf("%d",&pr[i]);
}
for(i=0;i<n-1;i++)
{
for(j=i+1;j<n;j++)
{
if(pr[i]>pr[j])
{
temp1=pr[i];
pr[i]=pr[j];
pr[j]=temp1;
temp1=pt[i];
pt[i]=pt[j];
pt[j]=temp1;
strcpy(temp,p[i]);
strcpy(p[i],p[j]);
strcpy(p[j],temp);
}
}
}
wt[0]=0;
for(i=1;i<n;i++)
{
wt[i]=wt[i-1]+et[i-1];
totwt=totwt+wt[i];
}
avgwt=(float)totwt/n;
printf("p_name\t p_time\t priority\t w_time\n");
for(i=0;i<n;i++)
{
printf(" %s\t %d\t %d\t %d\n" ,p[i],pt[i],pr[i],wt[i]);
}
printf("total waiting time=%d\n avg waiting time=%f",tot,avg);
getch();
}
Pure round robin scheduling processes A, then B, then C, then starts at A again. (A, B, C might be tasks in an operating system context, or devices in a master/slave control network, or whatever.) That is, pure round robin scheduling doesn't acknowledge priorities, and does not allow out-of-order processing. Real-life systems typically use a mixture of algorithms that, together, allow for prioritized and out-of-order processing while, on the other hand, trying to prevent starvation of lower priority items.
Parenthesis will affect the order of execution priority of statements. Expressions within parenthesis assume highest priority.
yes
The uncontrollable urge to drop the A task and being crossing the C's off your to do list.
Yes, a&b|c&d means (a&b)|(c&d), just like a&&bc&&d means (a&&b)(c&&d)
Advantages: - Priority based premptive scheduling -multitasking -multithreading -better response time -valuable services like senaphore,mailbox,queues etc. Disadvantages: -expensive Advantages: - Priority based premptive scheduling -multitasking -multithreading -better response time -valuable services like senaphore,mailbox,queues etc. Disadvantages: -expensive
why we use disk scheduling in c ?
Don C. Adams has written: 'Block scheduling' -- subject(s): Block scheduling (Education)
Priority inversion is a situation where in lower priority tasks will run blocking higher priority tasks waiting for resource (mutex). For ex: consider 3 tasks. A, B and C, A being highest priority task and C is lowest. Look at sequence of context swaps A goes for I/O . unlocks mutex. C was ready to run. So C starts running. locks mutex B is ready to run. Swaps out C and takes mutex. A is ready to run. but A is blocked as mutex is locked by B. but B will never relinqishes the mutex as its higher priority than C. The solution to priority inversion is Priority inheritance.
Pure round robin scheduling processes A, then B, then C, then starts at A again. (A, B, C might be tasks in an operating system context, or devices in a master/slave control network, or whatever.) That is, pure round robin scheduling doesn't acknowledge priorities, and does not allow out-of-order processing. Real-life systems typically use a mixture of algorithms that, together, allow for prioritized and out-of-order processing while, on the other hand, trying to prevent starvation of lower priority items.
Pure round robin scheduling processes A, then B, then C, then starts at A again. (A, B, C might be tasks in an operating system context, or devices in a master/slave control network, or whatever.) That is, pure round robin scheduling doesn't acknowledge priorities, and does not allow out-of-order processing. Real-life systems typically use a mixture of algorithms that, together, allow for prioritized and out-of-order processing while, on the other hand, trying to prevent starvation of lower priority items.
J. C. Thorpe has written: 'A comparison of vehicle scheduling methods'
Steven C. Kleiner has written: 'Distribution of a generic mission planning and scheduling toolkit for astronomical spacecraft' -- subject(s): Scheduling, Mission planning, Spaceborne astronomy, Launch vehicles
Sometimes, it is. Some implementations compile C++ code into C code, and then compile the C code.
Parenthesis will affect the order of execution priority of statements. Expressions within parenthesis assume highest priority.
A) client schedules B) migration schedules C) enterprise schedules D) Synchronized scheduling with IBM Tivoli Workload Scheduler
yes