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When the other task is blocked, it is unable to execute until the first task has finished using the shared resource. Programming languages and scheduling algorithms are designed to minimize the over-all effect of blocking. A process that blocks may prevent local work-tasks from progressing. In this case "blocking" often is seen as not wanted. [2]
A request to the OS is usually in the form of a system call, (i.e. a call from the running process to a function that is part of the OS code). For example, a process might become BLOCKED if it is requesting a file from disk or a saving a section of code or data from memory to a file on disk.
In computer architecture, a trace cache or execution trace cache is a specialized instruction cache which stores the dynamic stream of instructions known as trace. It helps in increasing the instruction fetch bandwidth and decreasing power consumption (in the case of Intel Pentium 4 ) by storing traces of instructions that have already been ...
With the advent of interrupts and preemptive multitasking, these I/O bound processes could be "blocked", or put on hold, pending the arrival of the necessary data, allowing other processes to utilize the CPU. As the arrival of the requested data would generate an interrupt, blocked processes could be guaranteed a timely return to execution.
Depending on the OS, a process may be made up of multiple threads of execution that execute instructions concurrently. [1] [2] While a computer program is a passive collection of instructions typically stored in a file on disk, a process is the execution of those instructions after being loaded from the disk into memory. Several processes may ...
If you use a firewall and are getting a blank page when trying to access AOL Mail, you may need to disable your pop-up blocking software or add AOL to your allowlist.
If a file is subject to mandatory locking, attempts to read from a region that is locked with an exclusive lock, or to write to a region that is locked with a shared or exclusive lock, will block until the lock is released. This strategy first originated in System V, and can be seen today in the Solaris, HP-UX, and Linux operating systems.
As a workaround before a patch was available, on December 28, 2005, Microsoft advised Windows users to unregister the dynamic-link library file shimgvw.dll (which can be done by executing the command regsvr32.exe /u shimgvw.dll from the Run menu or the command prompt) which invokes previewing of image files and is exploited by most of these ...