Mercurial > hg
view tests/test-commit-unresolved.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 | 75c2ca094d3a |
children | 8d72e29ad1e0 |
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#testcases abortcommand abortflag #if abortflag $ cat >> $HGRCPATH <<EOF > [alias] > abort = merge --abort > EOF #endif $ addcommit () { > echo $1 > $1 > hg add $1 > hg commit -d "${2} 0" -m $1 > } $ commit () { > hg commit -d "${2} 0" -m $1 > } $ hg init a $ cd a $ addcommit "A" 0 $ addcommit "B" 1 $ echo "C" >> A $ commit "C" 2 $ hg update -C 0 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo "D" >> A $ commit "D" 3 created new head State before the merge $ hg status $ hg id e45016d2b3d3 tip $ hg summary parent: 3:e45016d2b3d3 tip D branch: default commit: (clean) update: 2 new changesets, 2 branch heads (merge) phases: 4 draft Testing the abort functionality first in case of conflicts $ hg abort abort: no merge in progress (abortflag !) abort: no operation in progress (abortcommand !) [255] $ hg merge merging A warning: conflicts while merging A! (edit, then use 'hg resolve --mark') 1 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon [1] $ hg merge --abort e4501 abort: cannot specify a node with --abort [255] $ hg merge --abort --rev e4501 abort: cannot specify both --abort and --rev [255] #if abortcommand when in dry-run mode $ hg abort --dry-run merge in progress, will be aborted #endif $ hg abort aborting the merge, updating back to e45016d2b3d3 1 files updated, 0 files merged, 1 files removed, 0 files unresolved Checking that we got back in the same state $ hg status ? A.orig $ hg id e45016d2b3d3 tip $ hg summary parent: 3:e45016d2b3d3 tip D branch: default commit: 1 unknown (clean) update: 2 new changesets, 2 branch heads (merge) phases: 4 draft Merging a conflict araises $ hg merge merging A warning: conflicts while merging A! (edit, then use 'hg resolve --mark') 1 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon [1] Correct the conflict without marking the file as resolved $ echo "ABCD" > A $ hg commit -m "Merged" abort: unresolved merge conflicts (see 'hg help resolve') [255] Mark the conflict as resolved and commit $ hg resolve -m A (no more unresolved files) $ hg commit -m "Merged" Test that if a file is removed but not marked resolved, the commit still fails (issue4972) $ hg up ".^" 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg merge 2 merging A warning: conflicts while merging A! (edit, then use 'hg resolve --mark') 1 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon [1] $ hg rm --force A $ hg commit -m merged abort: unresolved merge conflicts (see 'hg help resolve') [255] $ hg resolve -ma (no more unresolved files) $ hg commit -m merged created new head Testing the abort functionality in case of no conflicts $ hg update -C 0 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ addcommit "E" 4 created new head $ hg id 68352a18a7c4 tip $ hg merge -r 4 2 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg merge --preview --abort abort: cannot specify both --abort and --preview [255] $ hg abort aborting the merge, updating back to 68352a18a7c4 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg id 68352a18a7c4 tip $ cd ..