[0/8] selftests/damon: test DAMOS tried regions and {min,max}_nr_regions

Message

SeongJae Park June 25, 2024, 6:05 p.m. UTC

This patch series fix a minor issue in a program for DAMON selftest, and
implement new functionality selftests for DAMOS tried regions and
{min,max}_nr_regions.  The test for max_nr_regions also test the
recovery from online tuning-caused limit violation, which was fixed by a
previous patch [1] titled "mm/damon/core: merge regions aggressively
when max_nr_regions is unmet".

The first patch fixes a minor problem in the articial memory access
pattern generator for tests.  Following 3 patches (2-4) implement
schemes tried regions test.  Then a couple of patches (5-6) implementing
static setup based {min,max}_nr_regions functionality test follows.
Final two patches (7-8) implement dynamic max_nr_regions update test.

[1] https://lore.kernel.org/[e-mail]

SeongJae Park (8):
  selftests/damon/access_memory: use user-defined region size
  selftests/damon/_damon_sysfs: support schemes_update_tried_regions
  selftests/damon: implement a program for even-numbered memory regions
    access
  selftests/damon: implement DAMOS tried regions test
  selftests/damon/_damon_sysfs: implement kdamonds stop function
  selftests/damon: implement test for min/max_nr_regions
  _damon_sysfs: implement commit() for online parameters update
  selftests/damon/damon_nr_regions: test online-tuned max_nr_regions

 tools/testing/selftests/damon/Makefile        |   3 +-
 tools/testing/selftests/damon/_damon_sysfs.py |  65 +++++++-
 tools/testing/selftests/damon/access_memory.c |   2 +-
 .../selftests/damon/access_memory_even.c      |  42 +++++
 .../selftests/damon/damon_nr_regions.py       | 145 ++++++++++++++++++
 .../selftests/damon/damos_tried_regions.py    |  65 ++++++++
 6 files changed, 319 insertions(+), 3 deletions(-)
 create mode 100644 tools/testing/selftests/damon/access_memory_even.c
 create mode 100644 tools/testing/selftests/damon/damon_nr_regions.py
 create mode 100644 tools/testing/selftests/damon/damos_tried_regions.py


base-commit: 99348045d11f3bac71146b381f90b0aa39855ee7