EmbLogic » samta.jhingan

Project 8: Block Driver Status

samta.jhingan — Tue, 16 Apr 2013 03:59:56 +0000

Successfully implemented block driver with ioctl and request function.

On initialisation the block driver is running the request function four times and all the requests that are coming are to read the data.

Status Project 7 Serial Port

samta.jhingan — Wed, 03 Apr 2013 17:07:37 +0000

Implemented multiple byte transfer using serial port successfully.

Project 6 Parallel POrt

samta.jhingan — Tue, 26 Mar 2013 10:51:10 +0000

Implemented byte mode

Project 6 : Parallel Port

samta.jhingan — Mon, 25 Mar 2013 11:06:24 +0000

Implemented nibble mode and compatibility mode.

Project 5 Status Character Driver

samta.jhingan — Tue, 05 Mar 2013 16:23:37 +0000

Implemented

#Blocking IO with readwrite semaphore

#Blocking IO with /proc to read bytes written after each 8 byte is written in scull

Project 5 Character Driver Status:

samta.jhingan — Thu, 28 Feb 2013 08:11:38 +0000

–Implemented:

#read and write operations using lseek.
#ioctl

#/proc

#sema_init

–left with

#completions and spinlocks
#read and move operation

Project 5: Character Driver

samta.jhingan — Mon, 04 Feb 2013 08:56:19 +0000

Implemented

#function to allocate memory to quantums.
#function to allocate memory to array of qsets.
#write function

Project 5: Character Driver Open and Release function

samta.jhingan — Sat, 02 Feb 2013 07:55:57 +0000

Implemented:

#Open and release functions

#container_of()

#accessed open and release functions using app.c file

Project 5 : Character Driver

samta.jhingan — Thu, 31 Jan 2013 15:51:06 +0000

Implemented for 20 nods

#cdev_init function

#cdev_add function

#initialised the value of sculldev for 20 nods

Project 5: Character Driver

samta.jhingan — Tue, 29 Jan 2013 09:03:01 +0000

Implemented using rcs
#register_chrdev()
#unregister_chrdev()
#alloc_chrdev_region()
#unregister_chrdev_region()
#module_param
#MAJOR and MINOR macros

Project 11: Linux Shell Scripting

samta.jhingan — Wed, 23 Jan 2013 15:28:17 +0000

Implemented

# Linux shell scripting questions.

Project4:Client Server using Sockets(AF_UNIX)

samta.jhingan — Tue, 22 Jan 2013 04:49:24 +0000

Implemented

#Client Server using AF_UNIX on my PC and ran 370 simultaneous threads

Project 4: Client Server Program Using Threads, Mutex,Semaphore,Msg Queue

samta.jhingan — Fri, 18 Jan 2013 12:13:20 +0000

Implemented
#The client server program using thread, mutex,semaphore and msg queue. In the program created thread for each request from the client and at client side created 1 thread for sendg and receiving different requests.. Program ran for 381 clients and then hangs..
Issues Faced::
1)When running simultaneous clients>5 in the background the output of some client reaching some other client.Not able to successfully run more than 5 threads on my PC in parallel…. Resolved by sleep(1)..

Faced problem 1) because was using pipes for processing clients and the was using 1 mutex for each processing client and the mutex were locked and unlocked in the child and parent process respectively. This was creating a problem as the client was working on a copy of mutex… Solved by locking the mutex before fork()
2)Couldnt implement the above program using fifo as different clients take each others data so used queues and specified type for each client..found FIFO unsuccessful to implement client server using thread

Project 3:IPC Server Client using shared memory and semaphores

samta.jhingan — Tue, 15 Jan 2013 08:25:18 +0000

Implemented #Server client using semaphores and shared memory Issues faced: At the time of reading at the server side couldnt find a way for the server to know whether new data has been entered or not so used a flag … Continue reading →

Project 3 IPC: Server Client using Message Queues

samta.jhingan — Thu, 10 Jan 2013 07:04:10 +0000

Implemented
#Server Client using message queues and ran for 650 clients using 2 queues for receiving and sendg…
Issues Faced:
*The queues werent getting created… Have to be a superuser to create queues… Found system call perror(“”); very useful to detect the error in this case as it clearly states why the above operation wasnt successful.
*The sprintf() ans sscanf() which were used for data transfer werent working properly…..Resolved by sandwiching a character between two integers in sscanf and sprintf. Also couldnt send a large string %s using sprintf.
*The clients were accepting each others mail..Resolved by setting the msg type to pid of the client thru getpid()