[v2,0/5] Fix histogram for some (corner) cases
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Message ID 20250401123633.58887-1-stefan.klug@ideasonboard.com
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  • Fix histogram for some (corner) cases
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Stefan Klug April 1, 2025, 12:36 p.m. UTC 
Hi all,

during my work on WDR I stumbled over a few non-linearities when dealing
with small inter quantile mean ranges. These led to hard to handle
oscillations. This series adds a testcase for the histogram class and
fixes the related issues.

Patch 1 adds the basic tests that pass with the current implementation.

Patch 2-3 fix issues in the quantile() implementation and add
corresponding tests.

Patch 4-5 fix issues in the interQuantileMean() implementation and also
add tests.

Best regards,
Stefan

Changes in v2:
- Add failing tests before the fix patches
- Include stylistic changes from review


Stefan Klug (5):
  test: ipa: libipa: Add histogram tests
  test: ipa: libipa: histogram: Add tests for quantile() returning a
    fraction
  libipa: histogram: Fix quantile() calculation for fractional results
  test: ipa: libipa: histogram: Add tests for small inter quantile mean
    ranges
  libipa: histogram: Fix interQuantileMean() for small ranges

 src/ipa/libipa/histogram.cpp  | 42 ++++++++++++++--------
 test/ipa/libipa/histogram.cpp | 66 +++++++++++++++++++++++++++++++++++
 test/ipa/libipa/meson.build   |  4 ++-
 3 files changed, 96 insertions(+), 16 deletions(-)
 create mode 100644 test/ipa/libipa/histogram.cpp