Update Popularity community #6950

xoriole · 2022-06-24T14:43:19Z

Major changes

Popular torrents gossip is now pull based and happens on introduction request callback
Popular torrents are selected from random normal variate favoring higher seeders.
~~3. Torrents selection for random check also uses random normal variate to find random torrent.~~

xoriole · 2022-08-24T13:11:26Z

retest this please

kozlovsky

Important and good PR! Requires some additional fixes. In my opinion it should be merged to the main branch and not to the release branch, as it is a new feature that can affect the release stability.

src/tribler/core/utilities/utilities.py

kozlovsky · 2022-08-26T12:10:44Z

src/tribler/core/components/torrent_checker/torrent_checker/torrent_checker.py

+ total_torrents = self.mds.TorrentState.select().count()
+ random_index = self._select_randomly_likely_popular_torrent_index(total_torrents)
+
+ random_popular_torrent = self.mds.TorrentState.select(lambda g: g.last_check < last_fresh_time)\
+ .order_by(lambda g: (desc(g.seeders), g.last_check))\
+ .fetch(limit=1, offset=random_index)[:]

- old_torrents = list(self.mds.TorrentState.select(lambda g: g.last_check < last_fresh_time).
- order_by(lambda g: (g.last_check, desc(g.seeders))).limit(TORRENT_SELECTION_POOL_SIZE))
+ random_old_torrent = self.mds.TorrentState.select(lambda g: g.last_check < last_fresh_time)\
+ .order_by(lambda g: (g.last_check, desc(g.seeders)))\
+ .fetch(limit=1, offset=random_index)[:]


I think it is not a good idea to use normally distributed offsets when selecting random torrents from the database for the check.

Let's consider a real-life situation when a user subscribed to several popular channels and has 3.5 million torrents in the database. In this case, the average offset will be approximately 1 million. So, to select a random torrent from the database, the SQL engine should sort torrents by last_check and seeders columns and then skip the first one million torrents to select a random one for the check. On a decent machine with an SSD drive, it took around 2 seconds just to select a single random torrent. During that time, the event loop is blocked, and it may be much slower on a machine with a traditional HDD drive.

It is not as necessary to select random torrents in a perfectly normalized way. Instead, we can select N completely random torrents from the database and choose the most popular from these torrents. It should be much faster. On the same machine, the query self.mds.TorrentState.select_random(100) takes four milliseconds for execution, much better than 2 seconds for the original query.

So, I suggest doing the following instead:

Select N random torrents

From these torrents, in Python, filter torrents with torrent.last_check < last_fresh_time (most torrents from the database should satisfy this criteria)

Order the resulting list by the number of seeders, and choose the most popular one.

Something like that (not tested):

random_torrents = self.mds.TorrentState.select_random(100) old_torrents = [t for t in random_torrents if t.last_check < last_fresh_time] result = [] if old_torrents: random_old_torrent = old_torrents[0] result.append(random_old_torrent) if len(old_torrents) > 1: popular_random_torrents = sorted(old_torrents[1:], key = lambda torrent: torrrent.seeders, reverse=True) most_popular_random_torrent = popular_random_torrents[0] result.append(most_popular_random_torrent) return result

Thank you for the opinion and the suggestion. I think this needs more in-depth thinking and thus can be its own separate PR that only deals with the changes to the torrent checker and not with the Popularity community. Therefore, I'll remove these changes from PR.

src/tribler/core/components/popularity/community/popularity_community.py

xoriole · 2022-09-14T09:29:28Z

Seems src/tribler/gui/tests/test_gui.py::test_add_deeptorrent test is failing on Windows with stack overflow

src/tribler/gui/tests/test_gui.py::test_add_deeptorrent Windows fatal exception: stack overflow

Thread 0x000020ec (most recent call first):
  File "C:\Users\tribler\AppData\Local\Programs\Python\Python38\lib\threading.py", line 306 in wait
  File "C:\Users\tribler\AppData\Local\Programs\Python\Python38\lib\threading.py", line 558 in wait
  File "C:\Users\tribler\AppData\Local\Programs\Python\Python38\lib\threading.py", line 1252 in run
  File "C:\Users\tribler\AppData\Local\Programs\Python\Python38\lib\threading.py", line 932 in _bootstrap_inner
  File "C:\Users\tribler\AppData\Local\Programs\Python\Python38\lib\threading.py", line 890 in _bootstrap

Current thread 0x00001bf8 (most recent call first):
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\src\tribler\gui\widgets\torrentfiletreewidget.py", line 253 in <lambda>
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\src\tribler\gui\widgets\torrentfiletreewidget.py", line 72 in subtree
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\src\tribler\gui\widgets\torrentfiletreewidget.py", line 252 in get_selected_items
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\src\tribler\gui\widgets\torrentfiletreewidget.py", line 225 in fill_entries
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\src\tribler\gui\dialogs\startdownloaddialog.py", line 198 in on_received_metainfo
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\src\tribler\gui\utilities.py", line 411 in trackback_wrapper
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\src\tribler\gui\tribler_request_manager.py", line 228 in on_finished
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\src\tribler\gui\tribler_request_manager.py", line 122 in <lambda>
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\src\tribler\gui\utilities.py", line 411 in trackback_wrapper
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\src\tribler\gui\tests\test_gui.py", line 157 in wait_for_list_populated
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\src\tribler\gui\tests\test_gui.py", line 442 in test_add_deeptorrent
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\python.py", line 192 in pytest_pyfunc_call
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_callers.py", line 39 in _multicall
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_manager.py", line 80 in _hookexec
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_hooks.py", line 265 in __call__
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\python.py", line 1761 in runtest
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\runner.py", line 166 in pytest_runtest_call
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_callers.py", line 39 in _multicall
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_manager.py", line 80 in _hookexec
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_hooks.py", line 265 in __call__
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\runner.py", line 259 in <lambda>
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\runner.py", line 338 in from_call
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\runner.py", line 258 in call_runtest_hook
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\runner.py", line 219 in call_and_report
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\runner.py", line 130 in runtestprotocol
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\runner.py", line 111 in pytest_runtest_protocol
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_callers.py", line 39 in _multicall
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_manager.py", line 80 in _hookexec
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_hooks.py", line 265 in __call__
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\main.py", line 347 in pytest_runtestloop
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_callers.py", line 39 in _multicall
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_manager.py", line 80 in _hookexec
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_hooks.py", line 265 in __call__
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\main.py", line 322 in _main
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\main.py", line 268 in wrap_session
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\main.py", line 315 in pytest_cmdline_main
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_callers.py", line 39 in _multicall
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_manager.py", line 80 in _hookexec
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\pluggy\_hooks.py", line 265 in __call__
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\config\__init__.py", line 164 in main
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\lib\site-packages\_pytest\config\__init__.py", line 187 in console_main
  File "E:\jenkins\workspace\GH_Tribler_PR_Tests\PR_GUI_win64\tribler\venv\Scripts\pytest.exe\__main__.py", line 7 in <module>
  File "C:\Users\tribler\AppData\Local\Programs\Python\Python38\lib\runpy.py", line 87 in _run_code
  File "C:\Users\tribler\AppData\Local\Programs\Python\Python38\lib\runpy.py", line 194 in _run_module_as_main

xoriole · 2022-09-14T09:37:27Z

retest this please

xoriole · 2022-09-15T09:46:48Z

retest this please

kozlovsky · 2022-09-15T13:58:44Z

#7052 should fix the issue

…election

Fix normal distributed positive int utility function

xoriole · 2022-09-16T11:46:43Z

retest this please

xoriole · 2022-09-19T13:48:48Z

retest this please

Add missing super call in introduction request callback in Popularity community

kozlovsky

Note that sometimes get_normally_distributed_positive_integers function can be really slow. Like, executing get_normally_distributed_positive_integers(9999, 10000) requires more than one minute on my PC.

However, with a low value of size argument, like GOSSIP_RANDOM_TORRENT_COUNT which is 10, it is not a problem.

xoriole force-pushed the feature/passive-popularity-712 branch from 732bbd6 to 928d970 Compare August 24, 2022 09:02

Tribler deleted a comment from tribler-ci Aug 24, 2022

xoriole force-pushed the feature/passive-popularity-712 branch from 1f89155 to 7605843 Compare August 24, 2022 12:48

xoriole marked this pull request as ready for review August 24, 2022 13:04

xoriole requested review from a team and kozlovsky and removed request for a team August 24, 2022 13:04

kozlovsky suggested changes Aug 26, 2022

View reviewed changes

drew2a reviewed Aug 26, 2022

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src/tribler/core/components/popularity/community/popularity_community.py Outdated Show resolved Hide resolved

xoriole force-pushed the feature/passive-popularity-712 branch from 7605843 to b6289b0 Compare September 14, 2022 07:55

xoriole changed the base branch from release/7.12 to main September 14, 2022 07:56

xoriole marked this pull request as draft September 14, 2022 08:27

xoriole force-pushed the feature/passive-popularity-712 branch from 4c79e26 to 8b46066 Compare September 14, 2022 09:15

xoriole added 6 commits September 16, 2022 11:16

Update torrent selection strategy to use normal distribution random s…

10f750f

…election

Make popular torrents request as pull based on Popularity community

dd9ca49

Add scipy as test requirement

baad09c

Update torrent checker tests

70de813

Refactor function name or normal random numbers

2e4ca68

Fix normal distributed positive int utility function

Clean up code and address codacy issues

1e48af8

xoriole force-pushed the feature/passive-popularity-712 branch from 8b46066 to 03bb3c8 Compare September 16, 2022 09:16

Address PR review comment about mean value to default zero

ff30643

Add missing super call in introduction request callback in Popularity community

Reverted changes on torrent_checker

dfa1901

xoriole force-pushed the feature/passive-popularity-712 branch from 03bb3c8 to dfa1901 Compare September 19, 2022 13:54

xoriole marked this pull request as ready for review September 19, 2022 14:10

xoriole requested a review from kozlovsky September 19, 2022 14:10

kozlovsky approved these changes Sep 21, 2022

View reviewed changes

xoriole merged commit 759c445 into Tribler:main Sep 22, 2022

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Update Popularity community #6950

Update Popularity community #6950

xoriole commented Jun 24, 2022 •

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Update Popularity community #6950

Update Popularity community #6950

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