When a process removes a shared memory while another process still using that memory?
When one process delete shared memory opened by itself, it will not affect other processes using the shared memory. That also means, the access to shared memory is not synchronized for processes.
Is shared memory faster than message passing?
Shared memory allows maximum speed and convenience of communication, as it can be done at memory speeds when within a computer. Shared memory is faster than message passing, as message-passing systems are typically implemented using system calls and thus require the more time-consuming task of kernel intervention.
Why do we need to share memory between two processes?
Shared memory is a memory shared between two or more processes. However, why do we need to share memory or some other means of communication?
Which is better shared memory or distributed memory?
The alternatives to shared memory are distributed memory and distributed shared memory, each having a similar set of issues. a method of inter-process communication (IPC), i.e. a way of exchanging data between programs running at the same time. One process will create an area in RAM which other processes can access;
What are the problems with a shared memory system?
The issue with shared memory systems is that many CPUs need fast access to memory and will likely cache memory, which has two complications: access time degradation: when several processors try to access the same memory location it causes contention. Trying to access nearby memory locations may cause false sharing.
How is inter-related communication performed in shared memory?
Usually, inter-related process communication is performed using Pipes or Named Pipes. Unrelated processes (say one process running in one terminal and another process in another terminal) communication can be performed using Named Pipes or through popular IPC techniques of Shared Memory and Message Queues.