Guys,
Just a heads-up on under-the-hood change[1] which is merged few minutes ago and
which affects all features that use bihash.
Now, bihash is allocating memory from the (main) heap, instead of mmap()-ing
it’s own alloc arena.
There are several beneifs of that approach:
- smaller memory footprint
- ability to use hugepages without dedicating them to specific feature
- smaller coredump files
Size of each table is now limited by heap size, and not by the value provided
during the table initialisation.
In some cases increasing heap size may be needed, and if performance matters
putting the main heap into hugepages may also be a good idea, as all bihash
tables will now immediately benefit out of it.
i.e. startup.conf example:
memory {
main-heap-size 2G
main-heap-page-size 1G
}
If anybody notices some issues, please let us know.
—
Damjan
[1] https://gerrit.fd.io/r/c/vpp/+/29099
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