Mercurial > hg
view tests/test-pull-bundle.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 | d7304434390f |
children | 3d5fb6cab832 |
line wrap: on
line source
#require no-chg $ hg init repo $ cd repo $ echo foo > foo $ hg ci -qAm 'add foo' $ echo >> foo $ hg ci -m 'change foo' $ hg up -qC 0 $ echo bar > bar $ hg ci -qAm 'add bar' $ hg log changeset: 2:effea6de0384 tag: tip parent: 0:bbd179dfa0a7 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: add bar changeset: 1:ed1b79f46b9a user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: change foo changeset: 0:bbd179dfa0a7 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: add foo $ cd .. Test pullbundle functionality $ cd repo $ cat <<EOF > .hg/hgrc > [server] > pullbundle = True > [extensions] > blackbox = > EOF $ hg bundle --base null -r 0 .hg/0.hg 1 changesets found $ hg bundle --base 0 -r 1 .hg/1.hg 1 changesets found $ hg bundle --base 1 -r 2 .hg/2.hg 1 changesets found $ cat <<EOF > .hg/pullbundles.manifest > 2.hg BUNDLESPEC=none-v2 heads=effea6de0384e684f44435651cb7bd70b8735bd4 bases=bbd179dfa0a71671c253b3ae0aa1513b60d199fa > 1.hg BUNDLESPEC=bzip2-v2 heads=ed1b79f46b9a29f5a6efa59cf12fcfca43bead5a bases=bbd179dfa0a71671c253b3ae0aa1513b60d199fa > 0.hg BUNDLESPEC=gzip-v2 heads=bbd179dfa0a71671c253b3ae0aa1513b60d199fa > EOF $ hg --config blackbox.track=debug --debug serve -p $HGPORT2 -d --pid-file=../repo.pid listening at http://*:$HGPORT2/ (bound to $LOCALIP:$HGPORT2) (glob) (?) $ cat ../repo.pid >> $DAEMON_PIDS $ cd .. $ hg clone -r 0 http://localhost:$HGPORT2/ repo.pullbundle adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets bbd179dfa0a7 (1 drafts) updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd repo.pullbundle $ hg pull -r 1 pulling from http://localhost:$HGPORT2/ searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets ed1b79f46b9a (1 drafts) (run 'hg update' to get a working copy) $ hg pull -r 2 pulling from http://localhost:$HGPORT2/ searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) new changesets effea6de0384 (1 drafts) (run 'hg heads' to see heads, 'hg merge' to merge) $ cd .. $ killdaemons.py $ grep 'sending pullbundle ' repo/.hg/blackbox.log * sending pullbundle "0.hg" (glob) * sending pullbundle "1.hg" (glob) * sending pullbundle "2.hg" (glob) $ rm repo/.hg/blackbox.log Test pullbundle functionality for incremental pulls $ cd repo $ hg --config blackbox.track=debug --debug serve -p $HGPORT2 -d --pid-file=../repo.pid listening at http://*:$HGPORT2/ (bound to $LOCALIP:$HGPORT2) (glob) (?) $ cat ../repo.pid >> $DAEMON_PIDS $ cd .. $ hg clone http://localhost:$HGPORT2/ repo.pullbundle2 requesting all changes adding changesets adding manifests adding file changes adding changesets adding manifests adding file changes adding changesets adding manifests adding file changes added 3 changesets with 3 changes to 3 files (+1 heads) new changesets bbd179dfa0a7:ed1b79f46b9a (3 drafts) updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ killdaemons.py $ grep 'sending pullbundle ' repo/.hg/blackbox.log * sending pullbundle "0.hg" (glob) * sending pullbundle "2.hg" (glob) * sending pullbundle "1.hg" (glob) $ rm repo/.hg/blackbox.log Test pullbundle functionality for incoming $ cd repo $ hg --config blackbox.track=debug --debug serve -p $HGPORT2 -d --pid-file=../repo.pid listening at http://*:$HGPORT2/ (bound to $LOCALIP:$HGPORT2) (glob) (?) $ cat ../repo.pid >> $DAEMON_PIDS $ cd .. $ hg clone http://localhost:$HGPORT2/ repo.pullbundle2a -r 0 adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets bbd179dfa0a7 (1 drafts) updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd repo.pullbundle2a $ hg incoming -r ed1b79f46b9a comparing with http://localhost:$HGPORT2/ searching for changes changeset: 1:ed1b79f46b9a tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: change foo $ cd .. $ killdaemons.py $ grep 'sending pullbundle ' repo/.hg/blackbox.log * sending pullbundle "0.hg" (glob) * sending pullbundle "1.hg" (glob) $ rm repo/.hg/blackbox.log Test recovery from misconfigured server sending no new data $ cd repo $ cat <<EOF > .hg/pullbundles.manifest > 0.hg heads=ed1b79f46b9a29f5a6efa59cf12fcfca43bead5a bases=bbd179dfa0a71671c253b3ae0aa1513b60d199fa > 0.hg heads=bbd179dfa0a71671c253b3ae0aa1513b60d199fa > EOF $ hg --config blackbox.track=debug --debug serve -p $HGPORT2 -d --pid-file=../repo.pid listening at http://*:$HGPORT2/ (bound to $LOCALIP:$HGPORT2) (glob) (?) $ cat ../repo.pid >> $DAEMON_PIDS $ cd .. $ hg clone -r 0 http://localhost:$HGPORT2/ repo.pullbundle3 adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets bbd179dfa0a7 (1 drafts) updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd repo.pullbundle3 $ hg pull -r 1 pulling from http://localhost:$HGPORT2/ searching for changes adding changesets adding manifests adding file changes added 0 changesets with 0 changes to 1 files abort: 00changelog.i@ed1b79f46b9a: no node! [255] $ cd .. $ killdaemons.py $ grep 'sending pullbundle ' repo/.hg/blackbox.log * sending pullbundle "0.hg" (glob) * sending pullbundle "0.hg" (glob) $ rm repo/.hg/blackbox.log