Questions tagged [memory-mapped-file]
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9 questions
0 votes
1 answer
265 views
How to analyse cause of memory usage not shown by htop
How can I best debug the following issue from here on? I have a python application running in a podman container which has plenty disk I/O due to a numpy memmap of two huge files, one input file ...
- 397
1 vote
1 answer
258 views
Why does linux freezes when trying to access peripherals connected to the lightweight hps-to-fpga bridge (or any bridge)?
I have been working on a Altera DE1-SoC Development Board for 8 months. The system I was working on includes a Cyclone V FPGA chip, particularly the 5CSEMA5F31C6N. It was running an embedded Linux ...
- 11
-1 votes
1 answer
959 views
What is the path of data transfer when using memory mapped file?
Is there any difference between the data transfer paths using read()/write() and using mmap() on a file? What does "kernel" mean in https://stackoverflow.com/a/41419353? mmap doesn't ...
- 107k
1 vote
1 answer
2k views
Allow partial memory mapping of /dev/mem
I have a SoC-FPGA(DE0-nano-soc) which contains an ARM-Cortex-A9 cpu with a Cyclone V FPGA on a single chip. the CPU has access to 1gb of DDR3 memory but the FPGA can also access this memory so they ...
- 347
5 votes
2 answers
10k views
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 ...
- 107k