[22841] Improve max_allocations calculation on SHM transport (backport #5659)
#5674
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* Refs #22841. Improve max_allocations calculation. Signed-off-by: Miguel Company <[email protected]> * Refs #22841. Consider a mean message size of half the max message size. Signed-off-by: Miguel Company <[email protected]> * Refs #22841. Move `shm_default_segment_size` to global scope. Signed-off-by: Miguel Company <[email protected]> * Refs #22841. Move `SharedMemTransportDescriptor` constants. Signed-off-by: Miguel Company <[email protected]> * Refs #22841. Change calculation of `mean_message_size`. Signed-off-by: Miguel Company <[email protected]> --------- Signed-off-by: Miguel Company <[email protected]> (cherry picked from commit b54cb8e)
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MiguelCompany
approved these changes
Mar 3, 2025
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Description
This PR improves SHM transport throughput by changing the calculation of the maximum number of allocated buffers.
It will now be the maximum between
segment size / mean_message_sizeand the configured port_queue_capacity.@Mergifyio backport 3.1.x 2.14.x 2.10.x
Contributor Checklist
Commit messages follow the project guidelines.
The code follows the style guidelines of this project.
NO: Tests that thoroughly check the new feature have been added/Regression tests checking the bug and its fix have been added; the added tests pass locally
N/A: Any new/modified methods have been properly documented using Doxygen.
N/A: Any new configuration API has an equivalent XML API (with the corresponding XSD extension)
Changes are backport compatible: they do NOT break ABI nor change library core behavior.
Changes are API compatible.
N/A: New feature has been added to the
versions.mdfile (if applicable).N/A: New feature has been documented/Current behavior is correctly described in the documentation.
Applicable backports have been included in the description.
Reviewer Checklist
This is an automatic backport of pull request #5659 done by [Mergify](https://mergify.com).