All Questions
Tagged with shared-memoryvirtual-memory
6 questions
2votes
1answer
5kviews
When should I alter overcommit_memory and what should I take into consideration when doing so?
I'm having a PC freeze issue that I can't seem to figure out. I have three identical PCs. They are each custom builds with i7 and 64GB of RAM. The OS drives are 512GB nvme drives. They each run ...
- 303
0votes
1answer
1kviews
How to understand PBS output "mem" and "vmem" keep the same when the task is x-fold increased with mpirun -np x task
Here is a simple experiment I tried: Given a task called "sim.exe" which doing a model simulation, I then use MPI to launch x "sim.exe" simultaneously on one node (shared memory system). I have tried ...
5votes
2answers
10kviews
Are sharing a memory-mapped file and sharing a memory region implemented based on each other?
Are sharing a memory-mapped file and sharing a memory region implemented based on each other? The following two quotes seem to say so, and seem a chicken-egg problem to me. Operating System Concepts ...
- 106k
1vote
1answer
802views
Interpetation of /proc/sys/kernel/shmall
Unless I am wrong. the value of /proc/sys/kernel/shmall indicates the the total amount of shared memory, in bytes, that can be allocated to the system. I am on a t2.micro ec2 debian instance, and I ...
- 3,069
17votes
1answer
25kviews
Understanding mmap
I was going through documentation regarding mmap here and tried to implement it using this video. I have a few questions regarding its implementation. Does mmap provide a mapping of a file and return ...
- 293
6votes
1answer
8kviews
How to know shared memory between two processes?
I need to know the amount of memory shared between two processes, that is, the intersection of their shared memories. Any ideas?
- 163
