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view tests/test-pull-bundle.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 | 29569f2db929 |
children | d7304434390f |
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#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 added 1 changesets with 1 changes to 1 files adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 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