Mercurial > hg
view tests/test-obsolete-divergent.t @ 38732:be4984261611
merge: mark file gets as not thread safe (issue5933)
In default installs, this has the effect of disabling the thread-based
worker on Windows when manifesting files in the working directory. My
measurements have shown that with revlog-based repositories, Mercurial
spends a lot of CPU time in revlog code resolving file data. This ends
up incurring a lot of context switching across threads and slows down
`hg update` operations when going from an empty working directory to
the tip of the repo.
On mozilla-unified (246,351 files) on an i7-6700K (4+4 CPUs):
before: 487s wall
after: 360s wall (equivalent to worker.enabled=false)
cpus=2: 379s wall
Even with only 2 threads, the thread pool is still slower.
The introduction of the thread-based worker (02b36e860e0b) states that
it resulted in a "~50%" speedup for `hg sparse --enable-profile` and
`hg sparse --disable-profile`. This disagrees with my measurement
above. I theorize a few reasons for this:
1) Removal of files from the working directory is I/O - not CPU - bound
and should benefit from a thread pool (unless I/O is insanely fast
and the GIL release is near instantaneous). So tests like `hg sparse
--enable-profile` may exercise deletion throughput and aren't good
benchmarks for worker tasks that are CPU heavy.
2) The patch was authored by someone at Facebook. The results were
likely measured against a repository using remotefilelog. And I
believe that revision retrieval during working directory updates with
remotefilelog will often use a remote store, thus being I/O and not
CPU bound. This probably resulted in an overstated performance gain.
Since there appears to be a need to enable the thread-based worker with
some stores, I've made the flagging of file gets as thread safe
configurable. I've made it experimental because I don't want to formalize
a boolean flag for this option and because this attribute is best
captured against the store implementation. But we don't have a proper
store API for this yet. I'd rather cross this bridge later.
It is possible there are revlog-based repositories that do benefit from
a thread-based worker. I didn't do very comprehensive testing. If there
are, we may want to devise a more proper algorithm for whether to use
the thread-based worker, including possibly config options to limit the
number of threads to use. But until I see evidence that justifies
complexity, simplicity wins.
Differential Revision: https://phab.mercurial-scm.org/D3963
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Wed, 18 Jul 2018 09:49:34 -0700 |
parents | afa96dd5a483 |
children | 34a46d48d24e |
line wrap: on
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Test file dedicated to testing the divergent troubles from obsolete changeset. This is the most complex troubles from far so we isolate it in a dedicated file. Enable obsolete $ cat >> $HGRCPATH << EOF > [ui] > logtemplate = {rev}:{node|short} {desc}{if(obsfate, " [{join(obsfate, "; ")}]")}\n > [experimental] > evolution.createmarkers=True > [extensions] > drawdag=$TESTDIR/drawdag.py > [alias] > debugobsolete = debugobsolete -d '0 0' > [phases] > publish=False > [templates] > wuentryshort = '{instability}:{if(divergentnodes, " ")}{divergentnodes} {reason} {node|shortest}\n' > whyunstableshort = '{whyunstable % wuentryshort}' > wuentryshorter = '{instability}:{divergentnodes % " {node|shortest} ({phase})"} {reason} {node|shortest}\n' > whyunstableshorter = '{whyunstable % wuentryshorter}' > EOF $ mkcommit() { > echo "$1" > "$1" > hg add "$1" > hg ci -m "$1" > } $ getid() { > hg log --hidden -r "desc('$1')" -T '{node}\n' > } setup repo $ hg init reference $ cd reference $ mkcommit base $ mkcommit A_0 $ hg up 0 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ mkcommit A_1 created new head $ hg up 0 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ mkcommit A_2 created new head $ hg up 0 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ cd .. $ newcase() { > hg clone -u 0 -q reference $1 > cd $1 > } direct divergence ----------------- A_1 have two direct and divergent successors A_1 and A_1 $ newcase direct $ hg debugobsolete `getid A_0` `getid A_1` obsoleted 1 changesets $ hg debugobsolete `getid A_0` `getid A_2` 2 new content-divergent changesets $ hg log -G --hidden * 3:392fd25390da A_2 | | * 2:82623d38b9ba A_1 |/ | x 1:007dc284c1f8 A_0 [rewritten as 2:82623d38b9ba; rewritten as 3:392fd25390da] |/ @ 0:d20a80d4def3 base $ hg debugsuccessorssets --hidden 'all()' d20a80d4def3 d20a80d4def3 007dc284c1f8 82623d38b9ba 392fd25390da 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da $ hg log -r 'contentdivergent()' 2:82623d38b9ba A_1 3:392fd25390da A_2 $ hg debugsuccessorssets 'all()' --closest d20a80d4def3 d20a80d4def3 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da $ hg debugsuccessorssets 'all()' --closest --hidden d20a80d4def3 d20a80d4def3 007dc284c1f8 82623d38b9ba 392fd25390da 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da check that mercurial refuse to push $ hg init ../other $ hg push ../other pushing to ../other searching for changes abort: push includes content-divergent changeset: 392fd25390da! [255] $ cd .. indirect divergence with known changeset ------------------------------------------- $ newcase indirect_known $ hg debugobsolete `getid A_0` `getid A_1` obsoleted 1 changesets $ hg debugobsolete `getid A_0` `getid A_2` 2 new content-divergent changesets $ mkcommit A_3 created new head $ hg debugobsolete `getid A_2` `getid A_3` obsoleted 1 changesets $ hg log -G --hidden @ 4:01f36c5a8fda A_3 | | x 3:392fd25390da A_2 [rewritten as 4:01f36c5a8fda] |/ | * 2:82623d38b9ba A_1 |/ | x 1:007dc284c1f8 A_0 [rewritten as 2:82623d38b9ba; rewritten as 3:392fd25390da] |/ o 0:d20a80d4def3 base $ hg debugsuccessorssets --hidden 'all()' d20a80d4def3 d20a80d4def3 007dc284c1f8 82623d38b9ba 01f36c5a8fda 82623d38b9ba 82623d38b9ba 392fd25390da 01f36c5a8fda 01f36c5a8fda 01f36c5a8fda $ hg log -r 'contentdivergent()' 2:82623d38b9ba A_1 4:01f36c5a8fda A_3 $ hg debugsuccessorssets 'all()' --closest d20a80d4def3 d20a80d4def3 82623d38b9ba 82623d38b9ba 01f36c5a8fda 01f36c5a8fda $ hg debugsuccessorssets 'all()' --closest --hidden d20a80d4def3 d20a80d4def3 007dc284c1f8 82623d38b9ba 392fd25390da 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da 01f36c5a8fda 01f36c5a8fda $ cd .. indirect divergence with known changeset ------------------------------------------- $ newcase indirect_unknown $ hg debugobsolete `getid A_0` aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa obsoleted 1 changesets $ hg debugobsolete aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa `getid A_1` $ hg debugobsolete `getid A_0` `getid A_2` 2 new content-divergent changesets $ hg log -G --hidden * 3:392fd25390da A_2 | | * 2:82623d38b9ba A_1 |/ | x 1:007dc284c1f8 A_0 [rewritten as 2:82623d38b9ba; rewritten as 3:392fd25390da] |/ @ 0:d20a80d4def3 base $ hg debugsuccessorssets --hidden 'all()' d20a80d4def3 d20a80d4def3 007dc284c1f8 82623d38b9ba 392fd25390da 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da $ hg log -r 'contentdivergent()' 2:82623d38b9ba A_1 3:392fd25390da A_2 $ hg debugsuccessorssets 'all()' --closest d20a80d4def3 d20a80d4def3 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da $ hg debugsuccessorssets 'all()' --closest --hidden d20a80d4def3 d20a80d4def3 007dc284c1f8 82623d38b9ba 392fd25390da 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da $ cd .. do not take unknown node in account if they are final ----------------------------------------------------- $ newcase final-unknown $ hg debugobsolete `getid A_0` `getid A_1` obsoleted 1 changesets $ hg debugobsolete `getid A_1` `getid A_2` obsoleted 1 changesets $ hg debugobsolete `getid A_0` bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb $ hg debugobsolete bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb cccccccccccccccccccccccccccccccccccccccc $ hg debugobsolete `getid A_1` dddddddddddddddddddddddddddddddddddddddd $ hg debugsuccessorssets --hidden 'desc('A_0')' 007dc284c1f8 392fd25390da $ hg debugsuccessorssets 'desc('A_0')' --closest $ hg debugsuccessorssets 'desc('A_0')' --closest --hidden 007dc284c1f8 82623d38b9ba $ cd .. divergence that converge again is not divergence anymore ----------------------------------------------------- $ newcase converged_divergence $ hg debugobsolete `getid A_0` `getid A_1` obsoleted 1 changesets $ hg debugobsolete `getid A_0` `getid A_2` 2 new content-divergent changesets $ mkcommit A_3 created new head $ hg debugobsolete `getid A_1` `getid A_3` obsoleted 1 changesets $ hg debugobsolete `getid A_2` `getid A_3` obsoleted 1 changesets $ hg log -G --hidden @ 4:01f36c5a8fda A_3 | | x 3:392fd25390da A_2 [rewritten as 4:01f36c5a8fda] |/ | x 2:82623d38b9ba A_1 [rewritten as 4:01f36c5a8fda] |/ | x 1:007dc284c1f8 A_0 [rewritten as 2:82623d38b9ba; rewritten as 3:392fd25390da] |/ o 0:d20a80d4def3 base $ hg debugsuccessorssets --hidden 'all()' d20a80d4def3 d20a80d4def3 007dc284c1f8 01f36c5a8fda 82623d38b9ba 01f36c5a8fda 392fd25390da 01f36c5a8fda 01f36c5a8fda 01f36c5a8fda $ hg log -r 'contentdivergent()' $ hg debugsuccessorssets 'all()' --closest d20a80d4def3 d20a80d4def3 01f36c5a8fda 01f36c5a8fda $ hg debugsuccessorssets 'all()' --closest --hidden d20a80d4def3 d20a80d4def3 007dc284c1f8 82623d38b9ba 392fd25390da 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da 01f36c5a8fda 01f36c5a8fda $ cd .. split is not divergences ----------------------------- $ newcase split $ hg debugobsolete `getid A_0` `getid A_1` `getid A_2` obsoleted 1 changesets $ hg log -G --hidden o 3:392fd25390da A_2 | | o 2:82623d38b9ba A_1 |/ | x 1:007dc284c1f8 A_0 [split as 2:82623d38b9ba, 3:392fd25390da] |/ @ 0:d20a80d4def3 base $ hg debugsuccessorssets --hidden 'all()' d20a80d4def3 d20a80d4def3 007dc284c1f8 82623d38b9ba 392fd25390da 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da $ hg log -r 'contentdivergent()' $ hg debugsuccessorssets 'all()' --closest d20a80d4def3 d20a80d4def3 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da $ hg debugsuccessorssets 'all()' --closest --hidden d20a80d4def3 d20a80d4def3 007dc284c1f8 82623d38b9ba 392fd25390da 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da Even when subsequent rewriting happen $ mkcommit A_3 created new head $ hg debugobsolete `getid A_1` `getid A_3` obsoleted 1 changesets $ hg up 0 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ mkcommit A_4 created new head $ hg debugobsolete `getid A_2` `getid A_4` obsoleted 1 changesets $ hg up 0 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ mkcommit A_5 created new head $ hg debugobsolete `getid A_4` `getid A_5` obsoleted 1 changesets $ hg log -G --hidden @ 6:e442cfc57690 A_5 | | x 5:6a411f0d7a0a A_4 [rewritten as 6:e442cfc57690] |/ | o 4:01f36c5a8fda A_3 |/ | x 3:392fd25390da A_2 [rewritten as 5:6a411f0d7a0a] |/ | x 2:82623d38b9ba A_1 [rewritten as 4:01f36c5a8fda] |/ | x 1:007dc284c1f8 A_0 [split as 2:82623d38b9ba, 3:392fd25390da] |/ o 0:d20a80d4def3 base $ hg debugsuccessorssets --hidden 'all()' d20a80d4def3 d20a80d4def3 007dc284c1f8 01f36c5a8fda e442cfc57690 82623d38b9ba 01f36c5a8fda 392fd25390da e442cfc57690 01f36c5a8fda 01f36c5a8fda 6a411f0d7a0a e442cfc57690 e442cfc57690 e442cfc57690 $ hg debugsuccessorssets 'all()' --closest d20a80d4def3 d20a80d4def3 01f36c5a8fda 01f36c5a8fda e442cfc57690 e442cfc57690 $ hg debugsuccessorssets 'all()' --closest --hidden d20a80d4def3 d20a80d4def3 007dc284c1f8 82623d38b9ba 392fd25390da 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da 01f36c5a8fda 01f36c5a8fda 6a411f0d7a0a e442cfc57690 e442cfc57690 e442cfc57690 $ hg log -r 'contentdivergent()' Check more complex obsolescence graft (with divergence) $ mkcommit B_0; hg up 0 0 files updated, 0 files merged, 2 files removed, 0 files unresolved $ hg debugobsolete `getid B_0` `getid A_2` obsoleted 1 changesets $ mkcommit A_7; hg up 0 created new head 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ mkcommit A_8; hg up 0 created new head 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg debugobsolete `getid A_5` `getid A_7` `getid A_8` obsoleted 1 changesets $ mkcommit A_9; hg up 0 created new head 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg debugobsolete `getid A_5` `getid A_9` 4 new content-divergent changesets $ hg log -G --hidden * 10:bed64f5d2f5a A_9 | | * 9:14608b260df8 A_8 |/ | * 8:7ae126973a96 A_7 |/ | x 7:3750ebee865d B_0 [rewritten as 3:392fd25390da] | | | x 6:e442cfc57690 A_5 [rewritten as 10:bed64f5d2f5a; split as 8:7ae126973a96, 9:14608b260df8] |/ | x 5:6a411f0d7a0a A_4 [rewritten as 6:e442cfc57690] |/ | * 4:01f36c5a8fda A_3 |/ | x 3:392fd25390da A_2 [rewritten as 5:6a411f0d7a0a] |/ | x 2:82623d38b9ba A_1 [rewritten as 4:01f36c5a8fda] |/ | x 1:007dc284c1f8 A_0 [split as 2:82623d38b9ba, 3:392fd25390da] |/ @ 0:d20a80d4def3 base $ hg debugsuccessorssets --hidden 'all()' d20a80d4def3 d20a80d4def3 007dc284c1f8 01f36c5a8fda bed64f5d2f5a 01f36c5a8fda 7ae126973a96 14608b260df8 82623d38b9ba 01f36c5a8fda 392fd25390da bed64f5d2f5a 7ae126973a96 14608b260df8 01f36c5a8fda 01f36c5a8fda 6a411f0d7a0a bed64f5d2f5a 7ae126973a96 14608b260df8 e442cfc57690 bed64f5d2f5a 7ae126973a96 14608b260df8 3750ebee865d bed64f5d2f5a 7ae126973a96 14608b260df8 7ae126973a96 7ae126973a96 14608b260df8 14608b260df8 bed64f5d2f5a bed64f5d2f5a $ hg debugsuccessorssets 'all()' --closest d20a80d4def3 d20a80d4def3 01f36c5a8fda 01f36c5a8fda 7ae126973a96 7ae126973a96 14608b260df8 14608b260df8 bed64f5d2f5a bed64f5d2f5a $ hg debugsuccessorssets 'all()' --closest --hidden d20a80d4def3 d20a80d4def3 007dc284c1f8 82623d38b9ba 392fd25390da 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da 01f36c5a8fda 01f36c5a8fda 6a411f0d7a0a e442cfc57690 e442cfc57690 e442cfc57690 3750ebee865d 392fd25390da 7ae126973a96 7ae126973a96 14608b260df8 14608b260df8 bed64f5d2f5a bed64f5d2f5a $ hg log -r 'contentdivergent()' 4:01f36c5a8fda A_3 8:7ae126973a96 A_7 9:14608b260df8 A_8 10:bed64f5d2f5a A_9 $ hg log -r bed64f5d2f5a -T '{whyunstable}\n' | sort content-divergent: 4:01f36c5a8fda (draft) 8:7ae126973a96 (draft) 9:14608b260df8 (draft) predecessor 007dc284c1f8 content-divergent: 8:7ae126973a96 (draft) 9:14608b260df8 (draft) predecessor e442cfc57690 $ hg log -r bed64f5d2f5a -T whyunstableshort | sort content-divergent: 4:01f36c5a8fda (draft) 8:7ae126973a96 (draft) 9:14608b260df8 (draft) predecessor 007d content-divergent: 8:7ae126973a96 (draft) 9:14608b260df8 (draft) predecessor e442 $ hg log -r bed64f5d2f5a -T whyunstableshorter | sort content-divergent: 01f3 (draft) 7ae1 (draft) 1460 (draft) predecessor 007d content-divergent: 7ae1 (draft) 1460 (draft) predecessor e442 fix the divergence $ mkcommit A_A; hg up 0 created new head 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg debugobsolete `getid A_9` `getid A_A` obsoleted 1 changesets $ hg debugobsolete `getid A_7` `getid A_A` obsoleted 1 changesets $ hg debugobsolete `getid A_8` `getid A_A` obsoleted 1 changesets $ hg log -G --hidden o 11:a139f71be9da A_A | | x 10:bed64f5d2f5a A_9 [rewritten as 11:a139f71be9da] |/ | x 9:14608b260df8 A_8 [rewritten as 11:a139f71be9da] |/ | x 8:7ae126973a96 A_7 [rewritten as 11:a139f71be9da] |/ | x 7:3750ebee865d B_0 [rewritten as 3:392fd25390da] | | | x 6:e442cfc57690 A_5 [rewritten as 10:bed64f5d2f5a; split as 8:7ae126973a96, 9:14608b260df8] |/ | x 5:6a411f0d7a0a A_4 [rewritten as 6:e442cfc57690] |/ | o 4:01f36c5a8fda A_3 |/ | x 3:392fd25390da A_2 [rewritten as 5:6a411f0d7a0a] |/ | x 2:82623d38b9ba A_1 [rewritten as 4:01f36c5a8fda] |/ | x 1:007dc284c1f8 A_0 [split as 2:82623d38b9ba, 3:392fd25390da] |/ @ 0:d20a80d4def3 base $ hg debugsuccessorssets --hidden 'all()' d20a80d4def3 d20a80d4def3 007dc284c1f8 01f36c5a8fda a139f71be9da 82623d38b9ba 01f36c5a8fda 392fd25390da a139f71be9da 01f36c5a8fda 01f36c5a8fda 6a411f0d7a0a a139f71be9da e442cfc57690 a139f71be9da 3750ebee865d a139f71be9da 7ae126973a96 a139f71be9da 14608b260df8 a139f71be9da bed64f5d2f5a a139f71be9da a139f71be9da a139f71be9da $ hg debugsuccessorssets 'all()' --closest d20a80d4def3 d20a80d4def3 01f36c5a8fda 01f36c5a8fda a139f71be9da a139f71be9da $ hg debugsuccessorssets 'all()' --closest --hidden d20a80d4def3 d20a80d4def3 007dc284c1f8 82623d38b9ba 392fd25390da 82623d38b9ba 82623d38b9ba 392fd25390da 392fd25390da 01f36c5a8fda 01f36c5a8fda 6a411f0d7a0a e442cfc57690 e442cfc57690 e442cfc57690 3750ebee865d 392fd25390da 7ae126973a96 a139f71be9da 14608b260df8 a139f71be9da bed64f5d2f5a a139f71be9da a139f71be9da a139f71be9da $ hg log -r 'contentdivergent()' #if serve $ hg serve -n test -p $HGPORT -d --pid-file=hg.pid --config web.view=all \ > -A access.log -E errors.log $ cat hg.pid >> $DAEMON_PIDS check an obsolete changeset that was rewritten and also split $ get-with-headers.py localhost:$HGPORT 'rev/e442cfc57690?style=paper' | egrep 'rewritten|split' <td>rewritten as <a href="/rev/bed64f5d2f5a?style=paper">bed64f5d2f5a</a> by test <span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span><br> split as <a href="/rev/7ae126973a96?style=paper">7ae126973a96</a> <a href="/rev/14608b260df8?style=paper">14608b260df8</a> by test <span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span></td> $ get-with-headers.py localhost:$HGPORT 'rev/e442cfc57690?style=coal' | egrep 'rewritten|split' <td>rewritten as <a href="/rev/bed64f5d2f5a?style=coal">bed64f5d2f5a</a> by test <span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span><br> split as <a href="/rev/7ae126973a96?style=coal">7ae126973a96</a> <a href="/rev/14608b260df8?style=coal">14608b260df8</a> by test <span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span></td> $ get-with-headers.py localhost:$HGPORT 'rev/e442cfc57690?style=gitweb' | egrep 'rewritten|split' <td>rewritten as <a class="list" href="/rev/bed64f5d2f5a?style=gitweb">bed64f5d2f5a</a> by test <span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span></td> <td>split as <a class="list" href="/rev/7ae126973a96?style=gitweb">7ae126973a96</a> <a class="list" href="/rev/14608b260df8?style=gitweb">14608b260df8</a> by test <span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span></td> $ get-with-headers.py localhost:$HGPORT 'rev/e442cfc57690?style=monoblue' | egrep 'rewritten|split' <dd>rewritten as <a href="/rev/bed64f5d2f5a?style=monoblue">bed64f5d2f5a</a> by test <span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span></dd> <dd>split as <a href="/rev/7ae126973a96?style=monoblue">7ae126973a96</a> <a href="/rev/14608b260df8?style=monoblue">14608b260df8</a> by test <span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span></dd> $ get-with-headers.py localhost:$HGPORT 'rev/e442cfc57690?style=spartan' | egrep 'rewritten|split' <td class="obsolete">rewritten as <a href="/rev/bed64f5d2f5a?style=spartan">bed64f5d2f5a</a> by test <span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span></td> <td class="obsolete">split as <a href="/rev/7ae126973a96?style=spartan">7ae126973a96</a> <a href="/rev/14608b260df8?style=spartan">14608b260df8</a> by test <span class="age">Thu, 01 Jan 1970 00:00:00 +0000</span></td> $ killdaemons.py #endif $ cd .. Subset does not diverge ------------------------------ Do not report divergent successors-set if it is a subset of another successors-set. (report [A,B] not [A] + [A,B]) $ newcase subset $ hg debugobsolete `getid A_0` `getid A_2` obsoleted 1 changesets $ hg debugobsolete `getid A_0` `getid A_1` `getid A_2` $ hg debugsuccessorssets --hidden 'desc('A_0')' 007dc284c1f8 82623d38b9ba 392fd25390da $ hg debugsuccessorssets 'desc('A_0')' --closest $ hg debugsuccessorssets 'desc('A_0')' --closest --hidden 007dc284c1f8 82623d38b9ba 392fd25390da $ cd .. Use scmutil.cleanupnodes API to create divergence $ hg init cleanupnodes $ cd cleanupnodes $ hg debugdrawdag <<'EOS' > B1 B3 B4 > | \| > A Z > EOS $ hg update -q B1 $ echo 3 >> B $ hg commit --amend -m B2 $ cat > $TESTTMP/scmutilcleanup.py <<EOF > from mercurial import registrar, scmutil > cmdtable = {} > command = registrar.command(cmdtable) > @command(b'cleanup') > def cleanup(ui, repo): > def node(expr): > unfi = repo.unfiltered() > rev = unfi.revs(expr).first() > return unfi.changelog.node(rev) > with repo.wlock(), repo.lock(), repo.transaction(b'delayedstrip'): > mapping = {node(b'desc(B1)'): [node(b'desc(B3)')], > node(b'desc(B3)'): [node(b'desc(B4)')]} > scmutil.cleanupnodes(repo, mapping, b'test') > EOF $ rm .hg/localtags $ hg cleanup --config extensions.t=$TESTTMP/scmutilcleanup.py 2 new content-divergent changesets $ hg log -G -T '{rev}:{node|short} {desc} {instabilities}' -r 'sort(all(), topo)' @ 5:1a2a9b5b0030 B2 content-divergent | | * 4:70d5a63ca112 B4 content-divergent | | | o 1:48b9aae0607f Z | o 0:426bada5c675 A $ hg debugobsolete a178212c3433c4e77b573f6011e29affb8aefa33 1a2a9b5b0030632400aa78e00388c20f99d3ec44 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '1', 'operation': 'amend', 'user': 'test'} a178212c3433c4e77b573f6011e29affb8aefa33 ad6478fb94ecec98b86daae98722865d494ac561 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '13', 'operation': 'test', 'user': 'test'} ad6478fb94ecec98b86daae98722865d494ac561 70d5a63ca112acb3764bc1d7320ca90ea688d671 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '9', 'operation': 'test', 'user': 'test'} $ hg debugwhyunstable 1a2a9b5b0030 content-divergent: 70d5a63ca112acb3764bc1d7320ca90ea688d671 (draft) predecessor a178212c3433c4e77b573f6011e29affb8aefa33 $ hg log -r 1a2a9b5b0030 -T '{whyunstable}\n' content-divergent: 4:70d5a63ca112 (draft) predecessor a178212c3433 $ hg log -r 1a2a9b5b0030 -T whyunstableshort content-divergent: 4:70d5a63ca112 (draft) predecessor a178 $ hg log -r 1a2a9b5b0030 -T whyunstableshorter content-divergent: 70d5 (draft) predecessor a178 #if serve $ hg serve -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log $ cat hg.pid >> $DAEMON_PIDS check explanation for a content-divergent changeset $ get-with-headers.py localhost:$HGPORT 'rev/1a2a9b5b0030?style=paper' | grep divergent: <td>content-divergent: <a href="/rev/70d5a63ca112?style=paper">70d5a63ca112</a> (draft) predecessor <a href="/rev/a178212c3433?style=paper">a178212c3433</a></td> $ get-with-headers.py localhost:$HGPORT 'rev/1a2a9b5b0030?style=coal' | grep divergent: <td>content-divergent: <a href="/rev/70d5a63ca112?style=coal">70d5a63ca112</a> (draft) predecessor <a href="/rev/a178212c3433?style=coal">a178212c3433</a></td> $ get-with-headers.py localhost:$HGPORT 'rev/1a2a9b5b0030?style=gitweb' | grep divergent: <td>content-divergent: <a class="list" href="/rev/70d5a63ca112?style=gitweb">70d5a63ca112</a> (draft) predecessor <a class="list" href="/rev/a178212c3433?style=gitweb">a178212c3433</a></td> $ get-with-headers.py localhost:$HGPORT 'rev/1a2a9b5b0030?style=monoblue' | grep divergent: <dd>content-divergent: <a href="/rev/70d5a63ca112?style=monoblue">70d5a63ca112</a> (draft) predecessor <a href="/rev/a178212c3433?style=monoblue">a178212c3433</a></dd> $ get-with-headers.py localhost:$HGPORT 'rev/1a2a9b5b0030?style=spartan' | grep divergent: <td class="unstable">content-divergent: <a href="/rev/70d5a63ca112?style=spartan">70d5a63ca112</a> (draft) predecessor <a href="/rev/a178212c3433?style=spartan">a178212c3433</a></td> $ killdaemons.py #endif