SharedMemory: How fast is attach and detach?
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Hi all,
Consider the following situation:
I have a program A which creates a shared memory, and a program B which attaches the shared memory.
Now, when program A is closed, program B is still attached to the shared memory. When program A is restartet, it cannot create the shared memory because B is still attached.
To avoid this problem, program B could attach and detach the shared memory every time it wants to read data.
And here is my question: How fast is attaching and detaching the shared memory, because reading out some data in my program should happen 100 times per second and faster.regards
Oliver -
Hi,
You should benchmark. That will depend on several factors so you should test the speed yourself.
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Hi all,
Consider the following situation:
I have a program A which creates a shared memory, and a program B which attaches the shared memory.
Now, when program A is closed, program B is still attached to the shared memory. When program A is restartet, it cannot create the shared memory because B is still attached.
To avoid this problem, program B could attach and detach the shared memory every time it wants to read data.
And here is my question: How fast is attaching and detaching the shared memory, because reading out some data in my program should happen 100 times per second and faster.regards
Oliver@stvokr said in SharedMemory: How fast is attach and detach?:
To avoid this problem, program B could attach and detach the shared memory every time it wants to read data.
Or program A could first check if the shared memory segment exists (by trying to attach to it) and only if that fails with
QSharedMemory::NotFounderror it would create it.
