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selftests/damon/_damon_sysfs: support monitoring intervals goal setup

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_damon_sysfs.py contains code for test-purpose DAMON sysfs interface
control.  Add support of the monitoring intervals auto-tune goal setup for
more tests.

Link: https://lkml.kernel.org/r/20250720171652.92309-4-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2025-07-20 10:16:33 -07:00 committed by Andrew Morton
parent 9d93c103ed
commit b436dfaad2
1 changed files with 42 additions and 1 deletions
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43
tools/testing/selftests/damon/_damon_sysfs.py
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@ -405,18 +405,56 @@ class DamonTarget:
return write_file(
os.path.join(self.sysfs_dir(), 'pid_target'), self.pid)
class IntervalsGoal:
access_bp = None
aggrs = None
min_sample_us = None
max_sample_us = None
attrs = None # owner DamonAttrs
def __init__(self, access_bp=0, aggrs=0, min_sample_us=0, max_sample_us=0):
self.access_bp = access_bp
self.aggrs = aggrs
self.min_sample_us = min_sample_us
self.max_sample_us = max_sample_us
def sysfs_dir(self):
return os.path.join(self.attrs.interval_sysfs_dir(), 'intervals_goal')
def stage(self):
err = write_file(
os.path.join(self.sysfs_dir(), 'access_bp'), self.access_bp)
if err is not None:
return err
err = write_file(os.path.join(self.sysfs_dir(), 'aggrs'), self.aggrs)
if err is not None:
return err
err = write_file(os.path.join(self.sysfs_dir(), 'min_sample_us'),
self.min_sample_us)
if err is not None:
return err
err = write_file(os.path.join(self.sysfs_dir(), 'max_sample_us'),
self.max_sample_us)
if err is not None:
return err
return None
class DamonAttrs:
sample_us = None
aggr_us = None
intervals_goal = None
update_us = None
min_nr_regions = None
max_nr_regions = None
context = None
def __init__(self, sample_us=5000, aggr_us=100000, update_us=1000000,
def __init__(self, sample_us=5000, aggr_us=100000,
intervals_goal=IntervalsGoal(), update_us=1000000,
min_nr_regions=10, max_nr_regions=1000):
self.sample_us = sample_us
self.aggr_us = aggr_us
self.intervals_goal = intervals_goal
self.intervals_goal.attrs = self
self.update_us = update_us
self.min_nr_regions = min_nr_regions
self.max_nr_regions = max_nr_regions
@ -436,6 +474,9 @@ class DamonAttrs:
return err
err = write_file(os.path.join(self.interval_sysfs_dir(), 'aggr_us'),
self.aggr_us)
if err is not None:
return err
err = self.intervals_goal.stage()
if err is not None:
return err
err = write_file(os.path.join(self.interval_sysfs_dir(), 'update_us'),