Mercurial > hg
view tests/test-rebase-parameters.t @ 44363:f7459da77f23
nodemap: introduce an option to use mmap to read the nodemap mapping
The performance and memory benefit is much greater if we don't have to copy all
the data in memory for each information. So we introduce an option (on by
default) to read the data using mmap.
This changeset is the last one definition the API for index support nodemap
data. (they have to be able to use the mmaping).
Below are some benchmark comparing the best we currently have in 5.3 with the
final step of this series (using the persistent nodemap implementation in
Rust). The benchmark run `hg perfindex` with various revset and the following
variants:
Before:
* do not use the persistent nodemap
* use the CPython implementation of the index for nodemap
* use mmapping of the changelog index
After:
* use the MixedIndex Rust code, with the NodeTree object for nodemap access
(still in review)
* use the persistent nodemap data from disk
* access the persistent nodemap data through mmap
* use mmapping of the changelog index
The persistent nodemap greatly speed up most operation on very large
repositories. Some of the previously very fast lookup end up a bit slower because
the persistent nodemap has to be setup. However the absolute slowdown is very
small and won't matters in the big picture.
Here are some numbers (in seconds) for the reference copy of mozilla-try:
Revset Before After abs-change speedup
-10000: 0.004622 0.005532 0.000910 × 0.83
-10: 0.000050 0.000132 0.000082 × 0.37
tip 0.000052 0.000085 0.000033 × 0.61
0 + (-10000:) 0.028222 0.005337 -0.022885 × 5.29
0 0.023521 0.000084 -0.023437 × 280.01
(-10000:) + 0 0.235539 0.005308 -0.230231 × 44.37
(-10:) + :9 0.232883 0.000180 -0.232703 ×1293.79
(-10000:) + (:99) 0.238735 0.005358 -0.233377 × 44.55
:99 + (-10000:) 0.317942 0.005593 -0.312349 × 56.84
:9 + (-10:) 0.313372 0.000179 -0.313193 ×1750.68
:9 0.316450 0.000143 -0.316307 ×2212.93
On smaller repositories, the cost of nodemap related operation is not as big, so
the win is much more modest. Yet it helps shaving a handful of millisecond here
and there.
Here are some numbers (in seconds) for the reference copy of mercurial:
Revset Before After abs-change speedup
-10: 0.000065 0.000097 0.000032 × 0.67
tip 0.000063 0.000078 0.000015 × 0.80
0 0.000561 0.000079 -0.000482 × 7.10
-10000: 0.004609 0.003648 -0.000961 × 1.26
0 + (-10000:) 0.005023 0.003715 -0.001307 × 1.35
(-10:) + :9 0.002187 0.000108 -0.002079 ×20.25
(-10000:) + 0 0.006252 0.003716 -0.002536 × 1.68
(-10000:) + (:99) 0.006367 0.003707 -0.002660 × 1.71
:9 + (-10:) 0.003846 0.000110 -0.003736 ×34.96
:9 0.003854 0.000099 -0.003755 ×38.92
:99 + (-10000:) 0.007644 0.003778 -0.003866 × 2.02
Differential Revision: https://phab.mercurial-scm.org/D7894
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Tue, 11 Feb 2020 11:18:52 +0100 |
parents | 9c9cfecd4600 |
children | 05654ea5137c |
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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 specify both --abort and --continue [255] $ hg rebase --continue --collapse abort: cannot use collapse with continue or abort [255] $ hg rebase --continue --dest 4 abort: cannot specify both --continue and --dest [255] $ hg rebase --base 5 --source 4 abort: cannot specify both --source and --base [255] $ hg rebase --rev 5 --source 4 abort: cannot specify both --rev and --source [255] $ hg rebase --base 5 --rev 4 abort: cannot specify both --rev and --base [255] $ hg rebase --base 6 abort: branch 'default' has 3 heads - please rebase to an explicit rev (run 'hg heads .' to see heads, specify destination with -d) [255] $ hg rebase --rev '1 & !1' --dest 8 empty "rev" revision set - nothing to rebase [1] $ hg rebase --rev 'wdir()' --dest 6 abort: cannot rebase the working copy [255] $ hg rebase --source 'wdir()' --dest 6 abort: cannot rebase the working copy [255] $ 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 branch: default commit: 1 unresolved (clean) update: 1 new changesets, 2 branch heads (merge) 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 ..