Lines Matching full:interval

164 monitoring attributes, ``sampling interval``, ``aggregation interval``,
165 ``update interval``, ``minimum number of regions``, and ``maximum number of
178 ``sampling interval`` and ``aggregation interval``.  In detail, DAMON checks
179 access to each page per ``sampling interval`` and aggregates the results.  In
181 ``aggregation interval`` passes, DAMON calls callback functions that previously
194         sleep(sampling interval)
209 interval``, DAMON randomly picks one page in each region, waits for one
210 ``sampling interval``, checks whether the page is accessed meanwhile, and
231 For each ``aggregation interval``, it compares the access frequencies
238 threshold becomes higher than possible maximum value (``aggregation interval``
239 divided by ``sampling interval``).   Then, after it reports and clears the
259 interval``, DAMON checks if the region's size and access frequency
275 interval (``update interval``).
288 In short, set ``aggregation interval`` to capture meaningful amount of accesses
291 default value of the interval, ``100ms``, turns out to be too short in many
292 cases.  Set ``sampling interval`` proportional to ``aggregation interval``.  By
295 ``Aggregation interval`` should be set as the time interval that the workload
296 can make an amount of accesses for the monitoring purpose, within the interval.
297 If the interval is too short, only small number of accesses are captured.  As a
305 capture per ``aggregation interval`` should carefully reconsidered.  Also, note
311 Hence the optimum value of ``aggregation interval`` depends on the access
312 intensiveness of the workload.  The user should tune the interval based on the
316 Note that the default value of the interval is 100 milliseconds, which is too
319 ``Sampling interval`` defines the resolution of each aggregation.  If it is set
323 useless in many use cases.  If ``sampling interval`` is too small, it will not
327 lowered.  It is recommended to be set proportional to ``aggregation interval``.
347 DAMON provides automatic tuning of the ``sampling interval`` and ``aggregation
348 interval`` based on the :ref:`the tuning guide idea
351 given time interval.  The target can be specified by the user as a ratio of
362 ``aggregation interval / sampling interval``.
365 and increases or decrease the ``sampleing interval`` and ``aggregation
366 interval`` in same ratio, if the observed access ratio is lower or higher than
370 The user can further set the minimum and maximum ``sampling interval`` that can
372 ``max_sample_us``).  Because the tuning mechanism changes ``sampling interval``
373 and ``aggregation interval`` in same ratio always, the minimum and maximum
374 ``aggregation interval`` after each of the tuning changes can automatically set
424 to the regions, for every user-specified time interval called