Mercurial > hg
view tests/test-rebase-pull.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 | 4441705b7111 |
children | 21733e8c924f |
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$ cat >> $HGRCPATH <<EOF > [extensions] > rebase= > histedit= > > [alias] > tglog = log -G --template "{rev}: {node|short} '{desc}' {branches}\n" > EOF $ hg init a $ cd a $ echo C1 > C1 $ hg ci -Am C1 adding C1 $ echo C2 > C2 $ hg ci -Am C2 adding C2 $ cd .. $ hg clone a b updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg clone a c updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd b $ echo L1 > L1 $ hg ci -Am L1 adding L1 $ cd ../a $ echo R1 > R1 $ hg ci -Am R1 adding R1 $ cd ../b Now b has one revision to be pulled from a: $ hg pull --rebase pulling from $TESTTMP/a searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets 77ae9631bcca rebasing 2:ff8d69a621f9 "L1" saved backup bundle to $TESTTMP/b/.hg/strip-backup/ff8d69a621f9-160fa373-rebase.hg $ hg tglog @ 3: d80cc2da061e 'L1' | o 2: 77ae9631bcca 'R1' | o 1: 783333faa078 'C2' | o 0: 05d58a0c15dd 'C1' Re-run: $ hg pull --rebase pulling from $TESTTMP/a searching for changes no changes found Abort pull early if working dir is not clean: $ echo L1-mod > L1 $ hg pull --rebase abort: uncommitted changes (cannot pull with rebase: please commit or shelve your changes first) [255] $ hg update --clean --quiet Abort pull early if another operation (histedit) is in progress: $ hg histedit . -q --commands - << EOF > edit d80cc2da061e histedit: generate unfinished state > EOF Editing (d80cc2da061e), you may commit or record as needed now. (hg histedit --continue to resume) [1] $ hg pull --rebase abort: histedit in progress (use 'hg histedit --continue' or 'hg histedit --abort') [255] $ hg histedit --abort --quiet Abort pull early with pending uncommitted merge: $ cd .. $ hg clone --noupdate c d $ cd d $ hg tglog o 1: 783333faa078 'C2' | o 0: 05d58a0c15dd 'C1' $ hg update --quiet 0 $ echo M1 > M1 $ hg commit --quiet -Am M1 $ hg update --quiet 1 $ hg merge 2 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg pull --rebase abort: outstanding uncommitted merge (cannot pull with rebase: please commit or shelve your changes first) [255] $ hg update --clean --quiet Abort pull early with unclean subrepo: $ echo s = s > .hgsub $ hg add .hgsub $ hg init s $ hg commit -m "generated a subrepo" $ echo a > s/a $ hg -R s add s/a $ hg pull --rebase abort: uncommitted changes in subrepository "s" (cannot pull with rebase: please commit or shelve your changes first) [255] Invoke pull --rebase and nothing to rebase: $ cd ../c $ hg book norebase $ hg pull --rebase pulling from $TESTTMP/a searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets 77ae9631bcca nothing to rebase - updating instead 1 files updated, 0 files merged, 0 files removed, 0 files unresolved updating bookmark norebase $ hg tglog -l 1 @ 2: 77ae9631bcca 'R1' | ~ pull --rebase --update should ignore --update: $ hg pull --rebase --update pulling from $TESTTMP/a searching for changes no changes found pull --rebase doesn't update if nothing has been pulled: $ hg up -q 1 $ hg pull --rebase pulling from $TESTTMP/a searching for changes no changes found $ hg tglog -l 1 o 2: 77ae9631bcca 'R1' | ~ $ cd .. pull --rebase works when a specific revision is pulled (issue3619) $ cd a $ hg tglog @ 2: 77ae9631bcca 'R1' | o 1: 783333faa078 'C2' | o 0: 05d58a0c15dd 'C1' $ echo R2 > R2 $ hg ci -Am R2 adding R2 $ echo R3 > R3 $ hg ci -Am R3 adding R3 $ cd ../c $ hg tglog o 2: 77ae9631bcca 'R1' | @ 1: 783333faa078 'C2' | o 0: 05d58a0c15dd 'C1' $ echo L1 > L1 $ hg ci -Am L1 adding L1 created new head $ hg pull --rev tip --rebase pulling from $TESTTMP/a searching for changes adding changesets adding manifests adding file changes added 2 changesets with 2 changes to 2 files new changesets 31cd3a05214e:770a61882ace rebasing 3:ff8d69a621f9 "L1" saved backup bundle to $TESTTMP/c/.hg/strip-backup/ff8d69a621f9-160fa373-rebase.hg $ hg tglog @ 5: 518d153c0ba3 'L1' | o 4: 770a61882ace 'R3' | o 3: 31cd3a05214e 'R2' | o 2: 77ae9631bcca 'R1' | o 1: 783333faa078 'C2' | o 0: 05d58a0c15dd 'C1' pull --rebase works with bundle2 turned on $ cd ../a $ echo R4 > R4 $ hg ci -Am R4 adding R4 $ hg tglog @ 5: 00e3b7781125 'R4' | o 4: 770a61882ace 'R3' | o 3: 31cd3a05214e 'R2' | o 2: 77ae9631bcca 'R1' | o 1: 783333faa078 'C2' | o 0: 05d58a0c15dd 'C1' $ cd ../c $ hg pull --rebase pulling from $TESTTMP/a searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets 00e3b7781125 rebasing 5:518d153c0ba3 "L1" saved backup bundle to $TESTTMP/c/.hg/strip-backup/518d153c0ba3-73407f14-rebase.hg $ hg tglog @ 6: 0d0727eb7ce0 'L1' | o 5: 00e3b7781125 'R4' | o 4: 770a61882ace 'R3' | o 3: 31cd3a05214e 'R2' | o 2: 77ae9631bcca 'R1' | o 1: 783333faa078 'C2' | o 0: 05d58a0c15dd 'C1' pull --rebase only update if there is nothing to rebase $ cd ../a $ echo R5 > R5 $ hg ci -Am R5 adding R5 $ hg tglog @ 6: 88dd24261747 'R5' | o 5: 00e3b7781125 'R4' | o 4: 770a61882ace 'R3' | o 3: 31cd3a05214e 'R2' | o 2: 77ae9631bcca 'R1' | o 1: 783333faa078 'C2' | o 0: 05d58a0c15dd 'C1' $ cd ../c $ echo L2 > L2 $ hg ci -Am L2 adding L2 $ hg up 'desc(L1)' 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg pull --rebase pulling from $TESTTMP/a searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets 88dd24261747 rebasing 6:0d0727eb7ce0 "L1" rebasing 7:c1f58876e3bf "L2" saved backup bundle to $TESTTMP/c/.hg/strip-backup/0d0727eb7ce0-ef61ccb2-rebase.hg $ hg tglog o 8: 6dc0ea5dcf55 'L2' | @ 7: 864e0a2d2614 'L1' | o 6: 88dd24261747 'R5' | o 5: 00e3b7781125 'R4' | o 4: 770a61882ace 'R3' | o 3: 31cd3a05214e 'R2' | o 2: 77ae9631bcca 'R1' | o 1: 783333faa078 'C2' | o 0: 05d58a0c15dd 'C1' pull --rebase update (no rebase) use proper update: - warn about other head. $ cd ../a $ echo R6 > R6 $ hg ci -Am R6 adding R6 $ cd ../c $ hg up 'desc(R5)' 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg pull --rebase pulling from $TESTTMP/a searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets 65bc164c1d9b nothing to rebase - updating instead 1 files updated, 0 files merged, 0 files removed, 0 files unresolved updated to "65bc164c1d9b: R6" 1 other heads for branch "default" $ hg tglog @ 9: 65bc164c1d9b 'R6' | | o 8: 6dc0ea5dcf55 'L2' | | | o 7: 864e0a2d2614 'L1' |/ o 6: 88dd24261747 'R5' | o 5: 00e3b7781125 'R4' | o 4: 770a61882ace 'R3' | o 3: 31cd3a05214e 'R2' | o 2: 77ae9631bcca 'R1' | o 1: 783333faa078 'C2' | o 0: 05d58a0c15dd 'C1' Multiple pre-existing heads on the branch ----------------------------------------- Pull bring content, but nothing on the current branch, we should not consider pre-existing heads. $ cd ../a $ hg branch unrelatedbranch marked working directory as branch unrelatedbranch (branches are permanent and global, did you want a bookmark?) $ echo B1 > B1 $ hg commit -Am B1 adding B1 $ cd ../c $ hg up 'desc(L2)' 2 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg pull --rebase pulling from $TESTTMP/a searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets 39c381359968 nothing to rebase There is two local heads and we pull a third one. The second local head should not confuse the `hg pull rebase`. $ hg up 'desc(R6)' 1 files updated, 0 files merged, 2 files removed, 0 files unresolved $ echo M1 > M1 $ hg commit -Am M1 adding M1 $ cd ../a $ hg up 'desc(R6)' 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo R7 > R7 $ hg commit -Am R7 adding R7 $ cd ../c $ hg up 'desc(L2)' 2 files updated, 0 files merged, 2 files removed, 0 files unresolved $ hg pull --rebase pulling from $TESTTMP/a searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets f7d3e42052f9 rebasing 7:864e0a2d2614 "L1" rebasing 8:6dc0ea5dcf55 "L2" saved backup bundle to $TESTTMP/c/.hg/strip-backup/864e0a2d2614-2f72c89c-rebase.hg $ hg tglog @ 12: 3603a865eea0 'L2' | o 11: bcc8a9cd04bf 'L1' | o 10: f7d3e42052f9 'R7' | | o 9: 41fab4eef82f 'M1' |/ | o 8: 39c381359968 'B1' unrelatedbranch |/ o 7: 65bc164c1d9b 'R6' | o 6: 88dd24261747 'R5' | o 5: 00e3b7781125 'R4' | o 4: 770a61882ace 'R3' | o 3: 31cd3a05214e 'R2' | o 2: 77ae9631bcca 'R1' | o 1: 783333faa078 'C2' | o 0: 05d58a0c15dd 'C1'