Computer Science - Computer Fundamentals - Discussion

Definition of SVC.

1) (Switched Virtual Circuit) A network connection that is established at the time the transmission is required and disconnected when the session is completed. SVCs are normally implemented in connection-oriented systems such as the analog telephone network and ATM networks. Contrast with PVC.

2) (Scalable Video Coding) An extension to the Advanced Video Coding (AVC) standard to accommodate rendering devices with different processing capabilities and/or degraded transmission paths. SVC allows low-resolution formats to travel as subsets alongside the high-resolution video. The subsets may eliminate frames or contain reduced frame sizes or both. Rather than display high-resolution video poorly, SVC enables lesser-quality video to flow smoothly on low-bandwidth devices and channels.

3) (SuperVisor Call) A mainframe instruction that passes control to the operating system.

Whenever there is an interrupt to the sequential instruction execution then the processors loads its program counter with the starting location of a routine which contains code to execute the interrupt. This location where the part of code is stored is called interrupt service routine(ISR). The processor executes the ISR and returns to the next instruction of the main program.

When a processor is interrupted, control is transferred to a special section of code designed to handle that interrupt.

This section is commonly referred to as an Interrupt Service Routine (ISR) or Interrupt Handler.

In many systems, this is triggered via a Supervisor Call (SVC) instruction or trap, which shifts control to the operating system or interrupt vector.

In technology, SVC can mean support vector classifier which is an application of support vector machines for classification.

It can also mean switched virtual circuit which is a type of virtual connection.

Or can mean still video camera which is commonly called digital still camera (DSC).

Steps on executing interrupt:.

1) The current instruction is finished and next instruction address is saved in the PC i.e. program counter.

2) then it goes to the MEMORY (M) where the ISR (interrupt service routine) is there and execute the interrupt from it.

Interrupt Service Routine (ISR).

A section of code to which control is transferred when a processor is interrupted is known as an Interrupt Service Routine (ISR). The processor executes the ISR and returns to the next instruction of the main program.

Anyone, can please clear my doubt What is SVC?

Some guys discussed various explanation about SVC which one is correct? I confused.

1- software storage virtualization.
2-supervisor Call.
3-Switched virtual connection.
4-Support vector classifier.

All the sections reside in memory. So, saying that 'M' means memory (which is the right answer) is illogical. I guess admins should change the answer to 'ISR', which is currently not in option.

@ vani:

SVC means "Supervisor Call". it executes the interrupt routine while the memory is in execution. This SVS is related to "assembler".

Wrong answer.

ISR. (interrupt service routine) is the interrupt handler which is the right answer and is not present so the answer is none of these.