[regression] MIR_CLIENT_PERF_REPORT is showing bogus render times and buffer lag

Bisected. The regression occurred in:

------------------------------------------------------------
revno: 3479 [merge]
author: Kevin DuBois <email address hidden>
committer: Tarmac
branch nick: development-branch
timestamp: Tue 2016-04-26 15:28:57 +0000
message:
  client: send incoming asynchronous buffer messages directly to the mcl::Buffer object. Prepares the buffers to be allocated from the connection, instead of a chain/stream.

  Change the async protocol a bit too so the RPC channel can manage the async buffers better. The RPC allocate/free buffer calls are not synchronized with the async buffer sending, so the server has to be a bit more explicit about what operation its performing, so the client side rpc channel can clean up the buffers better.

  So the notification chains go from:
  OBS (buffer_stream):
  rpc -> buffer_stream
  NBS (buffer_stream):
  rpc -> buffer_stream
  NBS: (presentation_chain):
  rpc -> buffer_stream -> buffer

  to:

  OBS (buffer_stream):
  rpc -> buffer_stream
  NBS (buffer_stream):
  rpc -> buffer -> buffer_stream
  NBS: (presentation_chain):
  rpc -> buffer .

  Approved by mir-ci-bot, Cemil Azizoglu.
------------------------------------------------------------

Fix committed into lp:mir at revision None, scheduled for release in mir, milestone 0.24.0

have to fix additional problem in 0.23, so its become easier to pick this up for 0.23.0

Fix committed to lp:mir/0.23 at revision 3499, scheduled for release in Mir 0.23.0

This bug was fixed in the package mir - 0.23.0+16.10.20160602.1-0ubuntu1

---------------
mir (0.23.0+16.10.20160602.1-0ubuntu1) yakkety; urgency=medium

  [ Kevin DuBois ]
  * New upstream release 0.23.0 (https://launchpad.net/mir/+milestone/0.23.0)
    - ABI summary:
      . mirclient ABI unchanged at 9
      . mirserver ABI bumped to 40
      . mircommon ABI bumped at 6
      . mirplatform ABI unchanged at 11
      . mirprotobuf ABI unchanged at 3
      . mirplatformgraphics ABI unchanged at 9
      . mirclientplatform ABI unchanged at 5
      . mirinputplatform ABI unchanged at 5
    - Enhancements:
      . Enable internal usage of more flexible graphics buffer submission,
        precursing client API additions.
    - Bug fixes:
      . Potential NBS performance loss after resize (LP: #1579076)
      . Performance loss with NBS and overlays on (LP: #1578159)
      . Mir crashes with useless backtrace when mg::Platform methods throw
        (LP: #1553549)
      . Virtual output is not removed when screencast client disappears
        (LP: #1573572)
      . Can't VT switch from mir_demo_server (any more) (LP: #1576260)
      . mir_demo_server(_minimal): Window movement/resizing stops responding
        when the cursor leaves the surface, and can lead to windows 1px wide
        and unrecoverable. (LP: #1447886)
      . Virtual display output configuration is set to LVDS (LP: #1573782)
      . Mir-on-X11 doesn't pass Alt+primary button drag to Mir (LP: #1575765)
      . Mir-on-X11 breaks mir_proving_server resize logic (LP: #1575192)
      . Resizing can crash mir_demo_server (LP: #1575211)
      . [regression] Cursor stops at phantom edge on M10 and N7 (LP: #1580774)
      . [regression] MIR_CLIENT_PERF_REPORT is showing bogus render times and
        buffer lag (LP: #1581368)
      . Test failures in ClientLogging.reports_performance due to the above
        fix. (LP: #1583970, LP: #1584603, LP: #1584605)
      . Do not throw when creating some objects under HWC 1.5 (LP: #1583086)
      . Correct black frame issue under Xmir (LP: #1584784)

  [ Tarmac, Kevin DuBois <email address hidden>, Daniel van Vugt <email address hidden>, Andreas Pokorny <email address hidden>, Alberto Aguirre ]
  * 0.23.0 Mir release

 -- Kevin DuBois <email address hidden> Thu, 02 Jun 2016 13:18:03 +0000