rust-nodemap: pure Rust example
To run, use `cargo run --release --example nodemap`
This demonstrates that simple scenarios entirely written
in Rust can content themselves with `NodeTree<T>`.
The example mmaps both the nodemap file and the changelog index.
We had of course to include an implementation of `RevlogIndex`
directly, which isn't much at this stage. It felt a bit
prematurate to include it in the lib.
Here are some first performance measurements, obtained with
this example, on a clone of mozilla-central with 440000
changesets:
(create) Nodemap constructed in RAM in 153.638305ms
(query CAE63161B68962) found in 22.362us: Ok(Some(269489))
(bench) Did 3 queries in 36.418µs (mean 12.139µs)
(bench) Did 50 queries in 184.318µs (mean 3.686µs)
(bench) Did 100000 queries in 31.053461ms (mean 310ns)
To be fair, even between bench runs, results tend to depend whether
the file is still in kernel caches, and it's not so easy to
get back to a real cold start. The worst we've seen was in the
50us ballpark.
In any busy server setting, the pages would always be in RAM.
We hope it's good enough not to be significantly slower on any
concrete Mercurial operation than the C nodetree when fully in RAM,
and of course this implementation has the serious headstart advantage
of persistence.
Differential Revision: https://phab.mercurial-scm.org/D7797
============================================
Testing obsolescence markers push: Cases B.5
============================================
Mercurial pushes obsolescences markers relevant to the "pushed-set", the set of
all changesets that requested to be "in sync" after the push (even if they are
already on both side).
This test belongs to a series of tests checking such set is properly computed
and applied. This does not tests "obsmarkers" discovery capabilities.
Category B: pruning case
TestCase 5: Push of a children of changeset which successors is pruned
B.5 Push of a children of changeset which successors is pruned
==============================================================
.. This case Mirror A.4, with pruned changeset successors.
..
.. {{{
.. C ◔
.. |
.. B⇠ø⇠⊗ B'
.. | |
.. A ø⇠○ A'
.. |/
.. ●
.. }}}
..
.. Marker exist from:
..
.. * `A ø⇠○ A'`
.. * `B ø⇠○ B'`
.. * chain from B
.. * `B' is pruned`
..
.. Command run:
..
.. * hg push -r C
..
.. Expected exchange:
..
.. * chain from B
..
.. Expected exclude:
..
.. * `A ø⇠○ A'`
.. * `B ø⇠○ B'`
.. * `B' prune`
Setup
-----
$ . $TESTDIR/testlib/exchange-obsmarker-util.sh
initial
$ setuprepos B.5
creating test repo for test case B.5
- pulldest
- main
- pushdest
cd into `main` and proceed with env setup
$ cd main
$ mkcommit A0
$ mkcommit B0
$ mkcommit C
$ hg up --quiet 0
$ mkcommit A1
created new head
$ mkcommit B1
$ hg debugobsolete --hidden `getid 'desc(A0)'` `getid 'desc(A1)'`
1 new obsolescence markers
obsoleted 1 changesets
2 new orphan changesets
$ hg debugobsolete --hidden aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa `getid 'desc(B0)'`
1 new obsolescence markers
$ hg debugobsolete --hidden `getid 'desc(B0)'` `getid 'desc(B1)'`
1 new obsolescence markers
obsoleted 1 changesets
$ hg prune -qd '0 0' 'desc(B1)'
$ hg log -G --hidden
x 069b05c3876d (draft): B1
|
@ e5ea8f9c7314 (draft): A1
|
| * 1d0f3cd25300 (draft): C
| |
| x 6e72f0a95b5e (draft): B0
| |
| x 28b51eb45704 (draft): A0
|/
o a9bdc8b26820 (public): O
$ inspect_obsmarkers
obsstore content
================
28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 069b05c3876d56f62895e853a501ea58ea85f68d 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
069b05c3876d56f62895e853a501ea58ea85f68d 0 {e5ea8f9c73143125d36658e90ef70c6d2027a5b7} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
$ cd ..
$ cd ..
Actual Test (explicit push version)
-----------------------------------
$ dotest B.5 C -f
## Running testcase B.5
# testing echange of "C" (1d0f3cd25300)
## initial state
# obstore: main
069b05c3876d56f62895e853a501ea58ea85f68d 0 {e5ea8f9c73143125d36658e90ef70c6d2027a5b7} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 069b05c3876d56f62895e853a501ea58ea85f68d 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
# obstore: pushdest
# obstore: pulldest
## pushing "C" from main to pushdest
pushing to pushdest
searching for changes
remote: adding changesets
remote: adding manifests
remote: adding file changes
remote: added 3 changesets with 3 changes to 3 files
remote: 1 new obsolescence markers
## post push state
# obstore: main
069b05c3876d56f62895e853a501ea58ea85f68d 0 {e5ea8f9c73143125d36658e90ef70c6d2027a5b7} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 069b05c3876d56f62895e853a501ea58ea85f68d 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
# obstore: pushdest
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
# obstore: pulldest
## pulling "1d0f3cd25300" from main into pulldest
pulling from main
searching for changes
adding changesets
adding manifests
adding file changes
added 3 changesets with 3 changes to 3 files
1 new obsolescence markers
new changesets 28b51eb45704:1d0f3cd25300 (3 drafts)
(run 'hg update' to get a working copy)
## post pull state
# obstore: main
069b05c3876d56f62895e853a501ea58ea85f68d 0 {e5ea8f9c73143125d36658e90ef70c6d2027a5b7} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 069b05c3876d56f62895e853a501ea58ea85f68d 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
# obstore: pushdest
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
# obstore: pulldest
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 6e72f0a95b5e01a7504743aa941f69cb1fbef8b0 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}