[Qemu-devel] [RFC 0/7] Migration stats

[Juan Quintela <quintela@redhat.com>]

Hi

This modifies the output of info migrate/qmp_query_migrate to add the
stats that I got request for.

- It moves total time to MigrationInfo instead of ram (luiz suggestion)
- Prints the real downtime that we have had

  really, it prints the total downtime of the complete phase, but the
  downtime also includes the last ram_iterate phase.  Working on
  fixing that one.

- Prints the expected downtime of the last time that we synchronized
  the dirty bitmap with kvm.  So we have one idea of what downtime
  value we need for migration to converge.

- Prints the dirty_pages_rate, that is the number of pages that we
  have written in the last second.  This one prints always zero.  To
  fill it, I need the dirty bitmap changes on the migration_thread
  series.

Patch series apply on top of the migration-next-20120808 series sent
to anthony.

What do I want to know:

- is there any stat that you want?  Once here, adding a new one should
  be easy.

- examples are not done, waiting until people agree with what params
  are needed.

- luiz added in case he has QMP commets.

- erik added for libvirt comments.

Added before is the link to the branch on my repository.

The following changes since commit 346fe0c4c0b88f11a3d0c01c34d9a170d73429cc:

  Merge remote-tracking branch 'stefanha/trivial-patches' into staging (2012-08-11 19:49:03 -0500)

are available in the git repository at:


  http://repo.or.cz/r/qemu/quintela.git migration-stats

for you to fetch changes up to e0599012abfc4f9a68185c6f0a10a7b98c0a180f:

  migration: Add dirty_pages_rate to query migrate output (2012-08-13 12:33:35 +0200)

Please review, and comment.

Juan Quintela (7):
  migration: move total_time from ram stats to migration info
  migration: store end_time in a local variable
  migration: print total downtime for final phase of migration
  migration: rename expected_time to expected_downtime
  migration: export migration_get_current()
  migration: print expected downtime in info migrate
  migration: Add dirty_pages_rate to query migrate output

 arch_init.c      | 19 +++++++++++--------
 hmp.c            | 16 ++++++++++++++--
 migration.c      | 19 ++++++++++++++-----
 migration.h      |  4 ++++
 qapi-schema.json | 26 +++++++++++++++++++-------
 5 files changed, 62 insertions(+), 22 deletions(-)

-- 
1.7.11.2