[libvirt] [PATCH 0/4] Introduce display of IOThreads Information

[John Ferlan]

These patches satisfy part of:

https://bugzilla.redhat.com/show_bug.cgi?id=1135491

Patches 1 and 2 are fairly straightforward adding a new API type patches
although they were implemented with the thought of how patch 3 works. Also
rather than implement a get iothreads and a get iothreadspin API, I combined
the two into one.  I could separate if that's more desirable, but it just
seemed more natural to have one API do both.

Patch 3 adds the qemu related to code to fetch not only the IOThreads
data, but also the cpumap/cpumaplen in order to display the CPU Affinity.
For that I somewhat followed how the vcpuinfo code works, but also a bit
on how the nodecpumap code does things.  Unlike the vcpuinfo code, I had
no way to count the IOThreads before calling, so rather than pass in a
cpumap/cpumaplen - I allocated them in the qemu code and passed them back
within the IOThreadsInfo structure. Of course it did get me to thinking
why are we doing 1 for each IOThread, but to that degree I was following
the vcpu model.

Patch 4 is the new 'virsh iothreads' command with no arguments (for now).
It will display the IOThreads of active domains only.

"Future" patches will implement a SetIOThreads API to change the
thread pinning and allow for add/delete of IOThreads. I'm hoping to
use the same command with new options --pin && --cpuset for pinning
the IOThreads or --add/--del to add/remove IOThreads, but I wanted to
make sure I had buyin on the use of one API to accomplish both get of
basic IOThread data and CPU Affinity data.


John Ferlan (4):
  Implement public API for virDomainGetIOThreadsInfo
  remote: Implement the remote plumbing for virDomainGetIOThreads
  qemu: Implement the qemu driver fetch for IOThreads
  virsh: Add 'iothreads' command

 daemon/remote.c                  |  75 +++++++++++++++++++++++++-
 include/libvirt/libvirt-domain.h |  22 +++++++-
 src/driver-hypervisor.h          |   8 ++-
 src/libvirt-domain.c             |  63 +++++++++++++++++++++-
 src/libvirt_public.syms          |   6 +++
 src/qemu/qemu_driver.c           | 114 +++++++++++++++++++++++++++++++++++++++
 src/remote/remote_driver.c       |  82 +++++++++++++++++++++++++++-
 src/remote/remote_protocol.x     |  29 +++++++++-
 src/remote_protocol-structs      |  20 +++++++
 src/rpc/gendispatch.pl           |   1 +
 tools/virsh-domain.c             |  72 +++++++++++++++++++++++++
 tools/virsh.pod                  |   7 +++
 12 files changed, 492 insertions(+), 7 deletions(-)

-- 
2.1.0