about concept of Interrupts.


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers about concept of Interrupts.
Prev   Next
# 1  
Old 01-30-2009
Bug about concept of Interrupts.

Hi all,
I am new here ,i want to know about interrupts in detail.What r
Interrupts .how they r handeled.
Thanx in adavnce.
 
Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Do UNIX signals produce interrupts?

Hi folks! I have been reading Vahalia's Unix Internals book, which states the following in the chapter dedicated to signals: Given that, my understanding is that processes running in user mode don't become aware of signals until they switch to kernel mode, where the issig() function is called... (3 Replies)
Discussion started by: Tru69
3 Replies

2. Infrastructure Monitoring

CPU - Interrupts distribution

Hi Gurus, I have a situation runing my ETL tools on the below server. The throughput while processing data is coming very low. When i tried to analyse the CPU stats i got colleceted the mpstat. Server Physical Host Name *********com IP**.***.** OS Type Linux OS Classlinux red hat... (3 Replies)
Discussion started by: r_t_1601
3 Replies

3. Programming

Getting notified in user-space on interrupts

Hi, I'm working on an AMD opteron running Linux 2.6.28.6 I want to preload a module specific register (MSR) with a value to have it overflow after a number of a specific event counts. As I understand, when the counter in the register overflows, an interrupt will be generated and handled by the... (2 Replies)
Discussion started by: mylinuxforums
2 Replies

4. Programming

SIGCHLD interrupts its own handler

Hi. I have a program whose job it is to manage 15 child processes. Sometimes these children die (sometimes deliberately other times with a SEGV). This causes a SIGCHLD to be sent to my program which uses waitpid() in the signal handler to gather information and, in most cases, restart the child.... (3 Replies)
Discussion started by: jrichemont
3 Replies

5. Linux

How to interrupts work queue with signals

Hi masters, I am doing a project to regulate network bandwidth. I am using workqueue to implement packets management (I uses kernel threads inside each of these work queue) , netfilter hooks to implement packet catcher . All my modules individually works fine . But when I run my workqueues,... (1 Reply)
Discussion started by: iamjayanth
1 Replies

6. UNIX for Dummies Questions & Answers

Traps and Interrupts

Well, I don't know where exactly to ask this doubt so I'm asking in the newbie section. I was reading about traps and interrupts when I thought of traps as something that cease the control of the OS from the user and interrupts that cease the control yet provide support for multitasking. Am I right... (3 Replies)
Discussion started by: Legend986
3 Replies

7. UNIX for Advanced & Expert Users

Interrupts problems

Hi, My machine is a Unixware 7.1.3 is a files server, and I had never problem with that machine, but since two days, the machine presents slows problems, i think that the problem is te device interrupts, I had checked all and I dont found it any problem. Any idea? Thanks, (sorry my... (2 Replies)
Discussion started by: By_Jam
2 Replies

8. UNIX for Dummies Questions & Answers

catching interrupts

hey i have been facing a problem,can you tell me if we can catch ctrl d in unix i have tried and sucessfully catched and disabled ctrl-c and ctrl -z but am not sure if we can do the same for CTRL-D, so got any clue mail on he forum or ...i mean c programming in Unix thats what i am working on (1 Reply)
Discussion started by: toughguy2handle
1 Replies

9. Filesystems, Disks and Memory

Does unix use interrupts?

I'm a freshman here and I have a simple question. Does unix use interrupts which is like Dos? Are they the same? Thx.:cool: (6 Replies)
Discussion started by: Frank_M
6 Replies
Login or Register to Ask a Question
ddi_intr_get_nintrs(9F) 												   ddi_intr_get_nintrs(9F)

NAME
ddi_intr_get_nintrs, ddi_intr_get_navail - return number of interrupts supported or available for a given interrupt type SYNOPSIS
#include <sys/types.h> #include <sys/conf.h> #include <sys/ddi.h> #include <sys/sunddi.h> int ddi_intr_get_nintrs(dev_info_t *dip, int type, int *nintrsp); int ddi_intr_get_navail(dev_info_t *dip, int type, int *navailp); INTERFACE LEVEL
Solaris DDI specific (Solaris DDI). ddi_intr_get_nintrs() dip Pointer to dev_info structure type Interrupt type nintrsp Pointer to number of interrupts of the given type that are supported by the system ddi_intr_get_navail() dip Pointer to dev_info structure type Interrupt type navailp Pointer to number of interrupts of the given type that are currently available from the system The ddi_intr_get_nintrs() function returns the number of interrupts of the given type supported by a particular hardware device. On a suc- cessful return, the number of supported interrupts is returned as an integer pointed to by the nintrsp argument. If the hardware device is not found to support any interrupts of the given type, the DDI_INTR_NOTFOUND failure is returned rather than a zero in nintrsp. The ddi_intr_get_navail() function returns the number of interrupts of a given type that is available to a particular hardware device. On a successful return, the number of available interrupts is returned as an integer pointed to by navailp. The hardware device may support more than one interrupt and can request that all interrupts be allocated. The host software can then use policy-based decisions to determine how many interrupts are made available to the device. Based on the determination, a value is returned that should be used to allocate interrupts with the ddi_int_alloc() function. If the device participates in resource management, a call to ddi_intr_get_navail() tells the device driver the number of interrupts of the given type that should be used. The host software can then use a policy-based decision to determine the number of interrupts to be allowed to the device. If the number is more than the number of interrupts currently being used, the device driver can ask for more resources. If the number is less than the number of interrupts currently being used, the device driver should prepare to disable and free the extra interrupts. The number of interrupts currently available is always a snapshot in time and can change if the interface is called again. See ddi_intr_get_supported_types(9F) for a list of valid supported types for a given hardware device. The ddi_intr_get_supported_types() function must be called prior to calling either ddi_intr_get_nintrs() or ddi_intr_get_navail(). The ddi_intr_get_nintrs() and ddi_intr_get_navail() functions return: DDI_SUCCESS On success. DDI_EINVAL On encountering invalid input parameters. DDI_INTR_NOTFOUND On not finding any interrupts for the given interrupt type. DDI_FAILURE On any implementation specific failure. CONTEXT
The ddi_intr_get_nintrs() and ddi_intr_get_navail() functions can be called from either user or kernel non-interrupt context. See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ attributes(5), ddi_intr_alloc(9F), ddi_intr_enable(9F), ddi_intr_get_supported_types(9F) The ddi_intr_get_nintrs() and ddi_intr_get_navail() functions can be called at any time, even if the driver has added an interrupt handler for a given interrupt specification. Consumers of these interfaces should verify that the return value is not equal to DDI_SUCCESS. Incomplete checking for failure codes could result in inconsistent behavior among platforms. 07 Apr 2005 ddi_intr_get_nintrs(9F)