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[Bug 1447947] Re: acceptance test ClientLatency.double_buffered_client_uses_all_buffers does not measure latency accurately (reports low latency when we know it's higher)

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>
Date: Tue, 29 Sep 2015 03:52:20 -0000
Reply-to: Bug 1447947 <1447947@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

mir (0.16.0+15.10.20150921.1-0ubuntu1) wily; urgency=medium


** Also affects: mir (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: mir (Ubuntu)
   Importance: Undecided => Medium

** Changed in: mir (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1447947

Title:
  acceptance test ClientLatency.double_buffered_client_uses_all_buffers
  does not measure latency accurately (reports low latency when we know
  it's higher)

Status in Mir:
  Fix Released
Status in mir package in Ubuntu:
  Fix Released

Bug description:
  acceptance test ClientLatency.double_buffered_client_uses_all_buffers
  no longer detects latency accurately.

  Today when I switched us back to triple buffering, that test continued
  to pass (on most machines) measuring a latency of around 1, which is
  inaccurate because it should be exactly 2.

  It appears the test got broken probably around r2387.

  More info: https://code.launchpad.net/~vanvugt/mir/triple-
  again/+merge/257316

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