Mercurial > hg
view tests/test-rebase-parameters.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 | 4edd427f34c1 |
children | 8197b395710e |
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$ cat >> $HGRCPATH <<EOF > [extensions] > rebase= > > [phases] > publish=False > > [alias] > tglog = log -G --template "{rev}: {node|short} '{desc}' {branches}\n" > EOF $ hg init a $ cd a $ hg unbundle "$TESTDIR/bundles/rebase.hg" adding changesets adding manifests adding file changes added 8 changesets with 7 changes to 7 files (+2 heads) new changesets cd010b8cd998:02de42196ebe (8 drafts) (run 'hg heads' to see heads, 'hg merge' to merge) $ hg up tip 3 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo I > I $ hg ci -AmI adding I $ hg tglog @ 8: e7ec4e813ba6 'I' | o 7: 02de42196ebe 'H' | | o 6: eea13746799a 'G' |/| o | 5: 24b6387c8c8c 'F' | | | o 4: 9520eea781bc 'E' |/ | o 3: 32af7686d403 'D' | | | o 2: 5fddd98957c8 'C' | | | o 1: 42ccdea3bb16 'B' |/ o 0: cd010b8cd998 'A' $ cd .. Version with only two heads (to allow default destination to work) $ hg clone -q -u . a a2heads -r 3 -r 8 These fail: $ hg clone -q -u . a a0 $ cd a0 $ hg rebase -s 8 -d 7 nothing to rebase [1] $ hg rebase --continue --abort abort: cannot use --abort with --continue [255] $ hg rebase --continue --collapse abort: cannot use collapse with continue or abort [255] $ hg rebase --continue --dest 4 abort: abort and continue do not allow specifying revisions [255] $ hg rebase --base 5 --source 4 abort: cannot specify both a source and a base [255] $ hg rebase --rev 5 --source 4 abort: cannot specify both a revision and a source [255] $ hg rebase --base 5 --rev 4 abort: cannot specify both a revision and a base [255] $ hg rebase --base 6 abort: branch 'default' has 3 heads - please rebase to an explicit rev (run 'hg heads .' to see heads) [255] $ hg rebase --rev '1 & !1' --dest 8 empty "rev" revision set - nothing to rebase [1] $ hg rebase --source '1 & !1' --dest 8 empty "source" revision set - nothing to rebase [1] $ hg rebase --base '1 & !1' --dest 8 empty "base" revision set - can't compute rebase set [1] $ hg rebase --dest 8 nothing to rebase - working directory parent is also destination [1] $ hg rebase -b . --dest 8 nothing to rebase - e7ec4e813ba6 is both "base" and destination [1] $ hg up -q 7 $ hg rebase --dest 8 --traceback nothing to rebase - working directory parent is already an ancestor of destination e7ec4e813ba6 [1] $ hg rebase --dest 8 -b. nothing to rebase - "base" 02de42196ebe is already an ancestor of destination e7ec4e813ba6 [1] $ hg rebase --dest '1 & !1' abort: empty revision set [255] These work: Rebase with no arguments (from 3 onto 8): $ cd .. $ hg clone -q -u . a2heads a1 $ cd a1 $ hg up -q -C 3 $ hg rebase rebasing 1:42ccdea3bb16 "B" rebasing 2:5fddd98957c8 "C" rebasing 3:32af7686d403 "D" saved backup bundle to $TESTTMP/a1/.hg/strip-backup/42ccdea3bb16-3cb021d3-rebase.hg $ hg tglog @ 6: ed65089c18f8 'D' | o 5: 7621bf1a2f17 'C' | o 4: 9430a62369c6 'B' | o 3: e7ec4e813ba6 'I' | o 2: 02de42196ebe 'H' | o 1: 24b6387c8c8c 'F' | o 0: cd010b8cd998 'A' Try to rollback after a rebase (fail): $ hg rollback no rollback information available [1] $ cd .. Rebase with base == '.' => same as no arguments (from 3 onto 8): $ hg clone -q -u 3 a2heads a2 $ cd a2 $ hg rebase --base . rebasing 1:42ccdea3bb16 "B" rebasing 2:5fddd98957c8 "C" rebasing 3:32af7686d403 "D" saved backup bundle to $TESTTMP/a2/.hg/strip-backup/42ccdea3bb16-3cb021d3-rebase.hg $ hg tglog @ 6: ed65089c18f8 'D' | o 5: 7621bf1a2f17 'C' | o 4: 9430a62369c6 'B' | o 3: e7ec4e813ba6 'I' | o 2: 02de42196ebe 'H' | o 1: 24b6387c8c8c 'F' | o 0: cd010b8cd998 'A' $ cd .. Rebase with dest == branch(.) => same as no arguments (from 3 onto 8): $ hg clone -q -u 3 a a3 $ cd a3 $ hg rebase --dest 'branch(.)' rebasing 1:42ccdea3bb16 "B" rebasing 2:5fddd98957c8 "C" rebasing 3:32af7686d403 "D" saved backup bundle to $TESTTMP/a3/.hg/strip-backup/42ccdea3bb16-3cb021d3-rebase.hg $ hg tglog @ 8: ed65089c18f8 'D' | o 7: 7621bf1a2f17 'C' | o 6: 9430a62369c6 'B' | o 5: e7ec4e813ba6 'I' | o 4: 02de42196ebe 'H' | | o 3: eea13746799a 'G' |/| o | 2: 24b6387c8c8c 'F' | | | o 1: 9520eea781bc 'E' |/ o 0: cd010b8cd998 'A' $ cd .. Specify only source (from 2 onto 8): $ hg clone -q -u . a2heads a4 $ cd a4 $ hg rebase --source 'desc("C")' rebasing 2:5fddd98957c8 "C" rebasing 3:32af7686d403 "D" saved backup bundle to $TESTTMP/a4/.hg/strip-backup/5fddd98957c8-f9244fa1-rebase.hg $ hg tglog o 6: 7726e9fd58f7 'D' | o 5: 72c8333623d0 'C' | @ 4: e7ec4e813ba6 'I' | o 3: 02de42196ebe 'H' | o 2: 24b6387c8c8c 'F' | | o 1: 42ccdea3bb16 'B' |/ o 0: cd010b8cd998 'A' $ cd .. Specify only dest (from 3 onto 6): $ hg clone -q -u 3 a a5 $ cd a5 $ hg rebase --dest 6 rebasing 1:42ccdea3bb16 "B" rebasing 2:5fddd98957c8 "C" rebasing 3:32af7686d403 "D" saved backup bundle to $TESTTMP/a5/.hg/strip-backup/42ccdea3bb16-3cb021d3-rebase.hg $ hg tglog @ 8: 8eeb3c33ad33 'D' | o 7: 2327fea05063 'C' | o 6: e4e5be0395b2 'B' | | o 5: e7ec4e813ba6 'I' | | | o 4: 02de42196ebe 'H' | | o | 3: eea13746799a 'G' |\| | o 2: 24b6387c8c8c 'F' | | o | 1: 9520eea781bc 'E' |/ o 0: cd010b8cd998 'A' $ cd .. Specify only base (from 1 onto 8): $ hg clone -q -u . a2heads a6 $ cd a6 $ hg rebase --base 'desc("D")' rebasing 1:42ccdea3bb16 "B" rebasing 2:5fddd98957c8 "C" rebasing 3:32af7686d403 "D" saved backup bundle to $TESTTMP/a6/.hg/strip-backup/42ccdea3bb16-3cb021d3-rebase.hg $ hg tglog o 6: ed65089c18f8 'D' | o 5: 7621bf1a2f17 'C' | o 4: 9430a62369c6 'B' | @ 3: e7ec4e813ba6 'I' | o 2: 02de42196ebe 'H' | o 1: 24b6387c8c8c 'F' | o 0: cd010b8cd998 'A' $ cd .. Specify source and dest (from 2 onto 7): $ hg clone -q -u . a a7 $ cd a7 $ hg rebase --source 2 --dest 7 rebasing 2:5fddd98957c8 "C" rebasing 3:32af7686d403 "D" saved backup bundle to $TESTTMP/a7/.hg/strip-backup/5fddd98957c8-f9244fa1-rebase.hg $ hg tglog o 8: 668acadedd30 'D' | o 7: 09eb682ba906 'C' | | @ 6: e7ec4e813ba6 'I' |/ o 5: 02de42196ebe 'H' | | o 4: eea13746799a 'G' |/| o | 3: 24b6387c8c8c 'F' | | | o 2: 9520eea781bc 'E' |/ | o 1: 42ccdea3bb16 'B' |/ o 0: cd010b8cd998 'A' $ cd .. Specify base and dest (from 1 onto 7): $ hg clone -q -u . a a8 $ cd a8 $ hg rebase --base 3 --dest 7 rebasing 1:42ccdea3bb16 "B" rebasing 2:5fddd98957c8 "C" rebasing 3:32af7686d403 "D" saved backup bundle to $TESTTMP/a8/.hg/strip-backup/42ccdea3bb16-3cb021d3-rebase.hg $ hg tglog o 8: 287cc92ba5a4 'D' | o 7: 6824f610a250 'C' | o 6: 7c6027df6a99 'B' | | @ 5: e7ec4e813ba6 'I' |/ o 4: 02de42196ebe 'H' | | o 3: eea13746799a 'G' |/| o | 2: 24b6387c8c8c 'F' | | | o 1: 9520eea781bc 'E' |/ o 0: cd010b8cd998 'A' $ cd .. Specify only revs (from 2 onto 8) $ hg clone -q -u . a2heads a9 $ cd a9 $ hg rebase --rev 'desc("C")::' rebasing 2:5fddd98957c8 "C" rebasing 3:32af7686d403 "D" saved backup bundle to $TESTTMP/a9/.hg/strip-backup/5fddd98957c8-f9244fa1-rebase.hg $ hg tglog o 6: 7726e9fd58f7 'D' | o 5: 72c8333623d0 'C' | @ 4: e7ec4e813ba6 'I' | o 3: 02de42196ebe 'H' | o 2: 24b6387c8c8c 'F' | | o 1: 42ccdea3bb16 'B' |/ o 0: cd010b8cd998 'A' $ cd .. Rebasing both a single revision and a merge in one command $ hg clone -q -u . a aX $ cd aX $ hg rebase -r 3 -r 6 --dest 8 rebasing 3:32af7686d403 "D" rebasing 6:eea13746799a "G" saved backup bundle to $TESTTMP/aX/.hg/strip-backup/eea13746799a-ad273fd6-rebase.hg $ cd .. Test --tool parameter: $ hg init b $ cd b $ echo c1 > c1 $ hg ci -Am c1 adding c1 $ echo c2 > c2 $ hg ci -Am c2 adding c2 $ hg up -q 0 $ echo c2b > c2 $ hg ci -Am c2b adding c2 created new head $ cd .. $ hg clone -q -u . b b1 $ cd b1 $ hg rebase -s 2 -d 1 --tool internal:local rebasing 2:e4e3f3546619 "c2b" (tip) note: not rebasing 2:e4e3f3546619 "c2b" (tip), its destination already has all its changes saved backup bundle to $TESTTMP/b1/.hg/strip-backup/e4e3f3546619-b0841178-rebase.hg $ hg cat c2 c2 $ cd .. $ hg clone -q -u . b b2 $ cd b2 $ hg rebase -s 2 -d 1 --tool internal:other rebasing 2:e4e3f3546619 "c2b" (tip) saved backup bundle to $TESTTMP/b2/.hg/strip-backup/e4e3f3546619-b0841178-rebase.hg $ hg cat c2 c2b $ cd .. $ hg clone -q -u . b b3 $ cd b3 $ hg rebase -s 2 -d 1 --tool internal:fail rebasing 2:e4e3f3546619 "c2b" (tip) unresolved conflicts (see hg resolve, then hg rebase --continue) [1] $ hg summary parent: 1:56daeba07f4b c2 parent: 2:e4e3f3546619 tip c2b branch: default commit: 1 modified, 1 unresolved (merge) update: (current) phases: 3 draft rebase: 0 rebased, 1 remaining (rebase --continue) $ hg resolve -l U c2 $ hg resolve -m c2 (no more unresolved files) continue: hg rebase --continue $ hg graft --continue abort: no graft in progress (continue: hg rebase --continue) [255] $ hg rebase -c --tool internal:fail rebasing 2:e4e3f3546619 "c2b" (tip) note: not rebasing 2:e4e3f3546619 "c2b" (tip), its destination already has all its changes saved backup bundle to $TESTTMP/b3/.hg/strip-backup/e4e3f3546619-b0841178-rebase.hg $ hg rebase -i abort: interactive history editing is supported by the 'histedit' extension (see "hg --config extensions.histedit= help -e histedit") [255] $ hg rebase --interactive abort: interactive history editing is supported by the 'histedit' extension (see "hg --config extensions.histedit= help -e histedit") [255] $ cd .. No common ancestor $ hg init separaterepo $ cd separaterepo $ touch a $ hg commit -Aqm a $ hg up -q null $ touch b $ hg commit -Aqm b $ hg rebase -d 0 nothing to rebase from d7486e00c6f1 to 3903775176ed [1] $ cd ..