Alexandru Matei f13d8f1412 main: fix high latency generated by file handle creation ...

Whenever the file descriptor table is full, Linux expands it by doubling
it's size.
The filesystem code that does this uses RCU synchronization to ensure
all pre-existing RCU read-side critical sections have completed. The
latency induced by this synchronization is a big part of the total time
required to restore a snapshot.

The kernel has an optimization in code, where it doesn't call
synchronize_rcu() if there is only one thread in the process. We can
take advantage of this optimization by expanding the descriptor table at
the application start, when it has only one thread.

This commit tries to expand the table to 4096 entries, this way we avoid
any expansion that could take place later.

Signed-off-by: Alexandru Matei <alexandru.matei@uipath.com>

2024-05-25 01:09:10 +00:00

..

bin

vmm: ch-remote: replace deprecated zbus macros with new equivalents

2024-05-23 12:20:06 +00:00

main.rs

main: fix high latency generated by file handle creation

2024-05-25 01:09:10 +00:00