disable interrupt sentence in Hindi
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- Further, disabling interrupts is often deemed too expensive to be practical.
- However, disabling interrupts has numerous downsides.
- Prior to kernel version 2.6, Linux disabled interrupt to implement short critical sections.
- RTOSs implementing the unified architecture solve the problem by simply disabling interrupts while the internal catalogue is updated.
- In multiprocessor systems, it is usually impossible to disable interrupts on all processors at the same time.
- If an ISR is involved, the only way to ensure exclusive access to common variables is to disable interrupts.
- For example, the Z80 / Z180 family disables interrupts once an interrupt is serviced by an interrupt service routine.
- If the I / O registers are swapped out, it is also necessary to disable interrupts via an STI instruction.
- When there are multiple instructions which must be completed without interruption, a CPU instruction which temporarily disables interrupts is used.
- Setting or clearing this mask may be faster than accessing an interrupt mask register ( IMR ) in a PIC or disabling interrupts in the device itself.
- For example, most processors allow programs to disable interrupts, putting off the execution of interrupt handlers, in order to protect critical sections of code.
- To avoid that you have to disable interrupts while accessing the data structure, in DOS or Linux .-- talk ) 06 : 15, 3 February 2015 ( UTC)
- Uniprocessor architectures have the option of using uninterruptable sequences of instructions using special instructions or instruction prefixes to disable interrupts temporarily but this technique does not work for multiprocessor shared-memory machines.
- On the Z80, if you execute DI ( disable interrupts ) followed by HALT ( wait for an interrupt ), the CPU will stay frozen waiting for an interrupt that cannot happen.
- CAS, and other atomic instructions, are sometimes thought to be unnecessary in uniprocessor systems, because the atomicity of any sequence of instructions can be achieved by disabling interrupts while executing it.
- If two tasks share data, each can gain exclusive access to variables either by disabling interrupts, locking the scheduler, using a semaphore, or preferably, using a mutual exclusion semaphore.
- That's why I was slightly surprised that they wait until the 2nd instruction to disable interrupts-I figure that leaves a 2 cycle interval in which, should an interrupt occur, it would be serviced by a garbage vector.
- Some old DOS programs that use a protected mode DOS extender and install their own interrupt handlers ( usually games ) use the CLI instruction in the handlers to disable interrupts and either POPF ( after a corresponding PUSHF ) or IRET ( which restores the flags from the stack as part of its effects ) to restore it.
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