pmxcfs: add IPC call to get multiple guest config properties at once
Previously we used the existing IPC call just for getting the `lock`
property of virtual guests in the cluster resource API call, but for
the tag display we'll to get another one and calling this twice seems
rather non-ideal.
Thus introduce a successor: CFS_IPC_GET_GUEST_CONFIG_PROPERTIES
It allows one to get multiple properties from a single, or all
virtual guest in-memory configs in one go. Keep the existing IPC call
as is for backward compatibility and add this as separate, new one.
The new IPC command basically behaves the same as the previous
CFS_IPC_GET_GUEST_CONFIG_PROPERTY, but takes a list of properties
instead and returns multiple properties per guest.
The existing perl wrapper around the IPC call to get a single
property was switched over to use the new IPC call too, so we'll
be able to drop the old IPC command with the next major release if
nothing comes up.
= Benchmark =
== Setup ==
Proxmox VE in a VM with CPU type host (Intel 12700k) and 4 cores
10000 typical configs with both 'lock' and 'tags' set at the end, and
fairly long tags ('test-tag1,test-tag2,test-tag3') (normal VM with a
snapshot, ~ 1 KiB)
== Test ==
Average of 100 runs each with time in milliseconds
== Previous Results ==
num props total time time per iteration
1 1054.2 10.2
== Results with this Patch ==
num props total time time per iter function
2 1332.2 13.2 get_properties
1 1051.2 10.2 get_properties
2 2082.2 20.2 get_property, 2 separate calls
1 1034.2 10.2 get_property
So, a call with the new code for one property is the same as with the
old code, and adding a second property only adds a bit of additional
time (in this case ~30%).
projects / pve-cluster.git / commit