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view tests/test-infinitepush.t @ 42743:8c9a6adec67a
rust-discovery: using the children cache in add_missing
The DAG range computation often needs to get back to very old
revisions, and turns out to be disproportionately long, given
that the end goal is to remove the descendents of the given
missing revisons from the undecided set.
The fast iteration capabilities available in the Rust case make
it possible to avoid the DAG range entirely, at the cost of
precomputing the children cache, and to simply iterate on
children of the given missing revisions.
This is a case where staying on the same side of the interface
between the two languages has clear benefits.
On discoveries with initial undecided sets
small enough to bypass sampling entirely, the total cost of
computing the children cache and the subsequent iteration
becomes better than the Python + C counterpart, which relies on
reachableroots2.
For example, on a repo with more than one million revisions with
an initial undecided set of 11 elements, we get these figures:
Rust version with simple iteration
addcommons: 57.287us
first undecided computation: 184.278334ms
first children cache computation: 131.056us
addmissings iteration: 42.766us
first addinfo total: 185.24 ms
Python + C version
first addcommons: 0.29 ms
addcommons 0.21 ms
first undecided computation 191.35 ms
addmissings 45.75 ms
first addinfo total: 237.77 ms
On discoveries with large undecided sets, the initial price paid
makes the first addinfo slower than the Python + C version,
but that's more than compensated by the gain in sampling and
subsequent iterations.
Here's an extreme example with an undecided set of a million revisions:
Rust version:
first undecided computation: 293.842629ms
first children cache computation: 407.911297ms
addmissings iteration: 34.312869ms
first addinfo total: 776.02 ms
taking initial sample
query 2: sampling time: 1318.38 ms
query 2; still undecided: 1005013, sample size is: 200
addmissings: 143.062us
Python + C version:
first undecided computation 298.13 ms
addmissings 80.13 ms
first addinfo total: 399.62 ms
taking initial sample
query 2: sampling time: 3957.23 ms
query 2; still undecided: 1005013, sample size is: 200
addmissings 52.88 ms
Differential Revision: https://phab.mercurial-scm.org/D6428
author | Georges Racinet <georges.racinet@octobus.net> |
---|---|
date | Tue, 16 Apr 2019 01:16:39 +0200 |
parents | 89630d0b3e23 |
children | d7304434390f |
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#require no-reposimplestore Testing infinipush extension and the confi options provided by it Setup $ . "$TESTDIR/library-infinitepush.sh" $ cp $HGRCPATH $TESTTMP/defaulthgrc $ setupcommon $ hg init repo $ cd repo $ setupserver $ echo initialcommit > initialcommit $ hg ci -Aqm "initialcommit" $ hg phase --public . $ cd .. $ hg clone ssh://user@dummy/repo client -q Create two heads. Push first head alone, then two heads together. Make sure that multihead push works. $ cd client $ echo multihead1 > multihead1 $ hg add multihead1 $ hg ci -m "multihead1" $ hg up null 0 files updated, 0 files merged, 2 files removed, 0 files unresolved $ echo multihead2 > multihead2 $ hg ci -Am "multihead2" adding multihead2 created new head $ hg push -r . --bundle-store pushing to ssh://user@dummy/repo searching for changes remote: pushing 1 commit: remote: ee4802bf6864 multihead2 $ hg push -r '1:2' --bundle-store pushing to ssh://user@dummy/repo searching for changes remote: pushing 2 commits: remote: bc22f9a30a82 multihead1 remote: ee4802bf6864 multihead2 $ scratchnodes bc22f9a30a821118244deacbd732e394ed0b686c ab1bc557aa090a9e4145512c734b6e8a828393a5 ee4802bf6864326a6b3dcfff5a03abc2a0a69b8f ab1bc557aa090a9e4145512c734b6e8a828393a5 Create two new scratch bookmarks $ hg up 0 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo scratchfirstpart > scratchfirstpart $ hg ci -Am "scratchfirstpart" adding scratchfirstpart created new head $ hg push -r . -B scratch/firstpart pushing to ssh://user@dummy/repo searching for changes remote: pushing 1 commit: remote: 176993b87e39 scratchfirstpart $ hg up 0 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo scratchsecondpart > scratchsecondpart $ hg ci -Am "scratchsecondpart" adding scratchsecondpart created new head $ hg push -r . -B scratch/secondpart pushing to ssh://user@dummy/repo searching for changes remote: pushing 1 commit: remote: 8db3891c220e scratchsecondpart Pull two bookmarks from the second client $ cd .. $ hg clone ssh://user@dummy/repo client2 -q $ cd client2 $ hg pull -B scratch/firstpart -B scratch/secondpart pulling from ssh://user@dummy/repo searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets * (glob) (run 'hg heads' to see heads, 'hg merge' to merge) $ hg log -r scratch/secondpart -T '{node}' 8db3891c220e216f6da214e8254bd4371f55efca (no-eol) $ hg log -r scratch/firstpart -T '{node}' 176993b87e39bd88d66a2cccadabe33f0b346339 (no-eol) Make two commits to the scratch branch $ echo testpullbycommithash1 > testpullbycommithash1 $ hg ci -Am "testpullbycommithash1" adding testpullbycommithash1 created new head $ hg log -r '.' -T '{node}\n' > ../testpullbycommithash1 $ echo testpullbycommithash2 > testpullbycommithash2 $ hg ci -Aqm "testpullbycommithash2" $ hg push -r . -B scratch/mybranch -q Create third client and pull by commit hash. Make sure testpullbycommithash2 has not fetched $ cd .. $ hg clone ssh://user@dummy/repo client3 -q $ cd client3 $ hg pull -r `cat ../testpullbycommithash1` pulling from ssh://user@dummy/repo searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets 33910bfe6ffe (1 drafts) (run 'hg update' to get a working copy) $ hg log -G -T '{desc} {phase} {bookmarks}' o testpullbycommithash1 draft | @ initialcommit public Make public commit in the repo and pull it. Make sure phase on the client is public. $ cd ../repo $ echo publiccommit > publiccommit $ hg ci -Aqm "publiccommit" $ hg phase --public . $ cd ../client3 $ hg pull pulling from ssh://user@dummy/repo searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets a79b6597f322 (run 'hg heads' to see heads, 'hg merge' to merge) $ hg log -G -T '{desc} {phase} {bookmarks} {node|short}' o publiccommit public a79b6597f322 | | o testpullbycommithash1 draft 33910bfe6ffe |/ @ initialcommit public 67145f466344 $ hg up a79b6597f322 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo scratchontopofpublic > scratchontopofpublic $ hg ci -Aqm "scratchontopofpublic" $ hg push -r . -B scratch/scratchontopofpublic pushing to ssh://user@dummy/repo searching for changes remote: pushing 1 commit: remote: c70aee6da07d scratchontopofpublic $ cd ../client2 $ hg pull -B scratch/scratchontopofpublic pulling from ssh://user@dummy/repo searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets a79b6597f322:c70aee6da07d (1 drafts) (run 'hg heads .' to see heads, 'hg merge' to merge) $ hg log -r scratch/scratchontopofpublic -T '{phase}' draft (no-eol)