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rust-nodemap: automatically use the rust index for persistent nodemap...
rust-nodemap: automatically use the rust index for persistent nodemap The persistent nodemap requires the rust index to be used to provides any gains. So we automatically enable it for revlog using the persistent nodemap. We keep it off for other revset because now that the rust revlog fully initialise the nodemap using it everywhere introduce a fairly significant regression (eg: hg diff moving from 0.8s to 2.3s on mozilla-try) Differential Revision: https://phab.mercurial-scm.org/D8164
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test-persistent-nodemap.t
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===================================
Test the persistent on-disk nodemap
===================================
$ hg init test-repo
$ cd test-repo
$ cat << EOF >> .hg/hgrc
> [experimental]
> exp-persistent-nodemap=yes
> [devel]
> persistent-nodemap=yes
> EOF
$ hg debugbuilddag .+5000
$ hg debugnodemap --metadata
uid: ???????????????? (glob)
tip-rev: 5000
data-length: 122880
data-unused: 0
$ f --size .hg/store/00changelog.n
.hg/store/00changelog.n: size=42
Simple lookup works
$ ANYNODE=`hg log --template '{node|short}\n' --rev tip`
$ hg log -r "$ANYNODE" --template '{rev}\n'
5000
#if rust
$ f --sha256 .hg/store/00changelog-*.nd
.hg/store/00changelog-????????????????.nd: sha256=1e38e9ffaa45cad13f15c1a9880ad606f4241e8beea2f61b4d5365abadfb55f6 (glob)
$ hg debugnodemap --dump-new | f --sha256 --size
size=122880, sha256=1e38e9ffaa45cad13f15c1a9880ad606f4241e8beea2f61b4d5365abadfb55f6
$ hg debugnodemap --dump-disk | f --sha256 --bytes=256 --hexdump --size
size=122880, sha256=1e38e9ffaa45cad13f15c1a9880ad606f4241e8beea2f61b4d5365abadfb55f6
0000: 00 00 00 76 00 00 01 65 00 00 00 95 00 00 01 34 |...v...e.......4|
0010: 00 00 00 19 00 00 01 69 00 00 00 ab 00 00 00 4b |.......i.......K|
0020: 00 00 00 07 00 00 01 4c 00 00 00 f8 00 00 00 8f |.......L........|
0030: 00 00 00 c0 00 00 00 a7 00 00 00 89 00 00 01 46 |...............F|
0040: 00 00 00 92 00 00 01 bc 00 00 00 71 00 00 00 ac |...........q....|
0050: 00 00 00 af 00 00 00 b4 00 00 00 34 00 00 01 ca |...........4....|
0060: 00 00 00 23 00 00 01 45 00 00 00 2d 00 00 00 b2 |...#...E...-....|
0070: 00 00 00 56 00 00 01 0f 00 00 00 4e 00 00 02 4c |...V.......N...L|
0080: 00 00 00 e7 00 00 00 cd 00 00 01 5b 00 00 00 78 |...........[...x|
0090: 00 00 00 e3 00 00 01 8e 00 00 00 4f 00 00 00 b1 |...........O....|
00a0: 00 00 00 30 00 00 00 11 00 00 00 25 00 00 00 d2 |...0.......%....|
00b0: 00 00 00 ec 00 00 00 69 00 00 01 2b 00 00 01 2e |.......i...+....|
00c0: 00 00 00 aa 00 00 00 15 00 00 00 3a 00 00 01 4e |...........:...N|
00d0: 00 00 00 4d 00 00 00 9d 00 00 00 8e 00 00 00 a4 |...M............|
00e0: 00 00 00 c3 00 00 00 eb 00 00 00 29 00 00 00 ad |...........)....|
00f0: 00 00 01 3a 00 00 01 32 00 00 00 04 00 00 00 53 |...:...2.......S|
#else
$ f --sha256 .hg/store/00changelog-*.nd
.hg/store/00changelog-????????????????.nd: sha256=b961925120e1c9bc345c199b2cc442abc477029fdece37ef9d99cbe59c0558b7 (glob)
$ hg debugnodemap --dump-new | f --sha256 --size
size=122880, sha256=b961925120e1c9bc345c199b2cc442abc477029fdece37ef9d99cbe59c0558b7
$ hg debugnodemap --dump-disk | f --sha256 --bytes=256 --hexdump --size
size=122880, sha256=b961925120e1c9bc345c199b2cc442abc477029fdece37ef9d99cbe59c0558b7
0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0010: ff ff ff ff ff ff ff ff ff ff fa c2 ff ff ff ff |................|
0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0030: ff ff ff ff ff ff ed b3 ff ff ff ff ff ff ff ff |................|
0040: ff ff ff ff ff ff ee 34 00 00 00 00 ff ff ff ff |.......4........|
0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0080: ff ff ff ff ff ff f8 50 ff ff ff ff ff ff ff ff |.......P........|
0090: ff ff ff ff ff ff ff ff ff ff ec c7 ff ff ff ff |................|
00a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00b0: ff ff ff ff ff ff fa be ff ff f2 fc ff ff ff ff |................|
00c0: ff ff ff ff ff ff ef ea ff ff ff ff ff ff f9 17 |................|
00d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
#endif
$ hg debugnodemap --check
revision in index: 5001
revision in nodemap: 5001
add a new commit
$ hg up
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo foo > foo
$ hg add foo
$ hg ci -m 'foo'
#if no-pure no-rust
$ hg debugnodemap --metadata
uid: ???????????????? (glob)
tip-rev: 5001
data-length: 122880
data-unused: 0
#else
$ hg debugnodemap --metadata
uid: ???????????????? (glob)
tip-rev: 5001
data-length: 123072
data-unused: 192
#endif
$ f --size .hg/store/00changelog.n
.hg/store/00changelog.n: size=42
(The pure code use the debug code that perform incremental update, the C code reencode from scratch)
#if pure
$ f --sha256 .hg/store/00changelog-*.nd --size
.hg/store/00changelog-????????????????.nd: size=123072, sha256=136472751566c8198ff09e306a7d2f9bd18bd32298d614752b73da4d6df23340 (glob)
#endif
#if rust
$ f --sha256 .hg/store/00changelog-*.nd --size
.hg/store/00changelog-????????????????.nd: size=123072, sha256=ccc8a43310ace13812fcc648683e259346754ef934c12dd238cf9b7fadfe9a4b (glob)
#endif
#if no-pure no-rust
$ f --sha256 .hg/store/00changelog-*.nd --size
.hg/store/00changelog-????????????????.nd: size=122880, sha256=bfafebd751c4f6d116a76a37a1dee2a251747affe7efbcc4f4842ccc746d4db9 (glob)
#endif
$ hg debugnodemap --check
revision in index: 5002
revision in nodemap: 5002
Test code path without mmap
---------------------------
$ echo bar > bar
$ hg add bar
$ hg ci -m 'bar' --config experimental.exp-persistent-nodemap.mmap=no
$ hg debugnodemap --check --config experimental.exp-persistent-nodemap.mmap=yes
revision in index: 5003
revision in nodemap: 5003
$ hg debugnodemap --check --config experimental.exp-persistent-nodemap.mmap=no
revision in index: 5003
revision in nodemap: 5003
#if pure
$ hg debugnodemap --metadata
uid: ???????????????? (glob)
tip-rev: 5002
data-length: 123328
data-unused: 384
$ f --sha256 .hg/store/00changelog-*.nd --size
.hg/store/00changelog-????????????????.nd: size=123328, sha256=10d26e9776b6596af0f89143a54eba8cc581e929c38242a02a7b0760698c6c70 (glob)
#endif
#if rust
$ hg debugnodemap --metadata
uid: ???????????????? (glob)
tip-rev: 5002
data-length: 123328
data-unused: 384
$ f --sha256 .hg/store/00changelog-*.nd --size
.hg/store/00changelog-????????????????.nd: size=123328, sha256=081eec9eb6708f2bf085d939b4c97bc0b6762bc8336bc4b93838f7fffa1516bf (glob)
#endif
#if no-pure no-rust
$ hg debugnodemap --metadata
uid: ???????????????? (glob)
tip-rev: 5002
data-length: 122944
data-unused: 0
$ f --sha256 .hg/store/00changelog-*.nd --size
.hg/store/00changelog-????????????????.nd: size=122944, sha256=755976b22b64ab680401b45395953504e64e7fa8c31ac570f58dee21e15f9bc0 (glob)
#endif
Test force warming the cache
$ rm .hg/store/00changelog.n
$ hg debugnodemap --metadata
$ hg debugupdatecache
#if pure
$ hg debugnodemap --metadata
uid: ???????????????? (glob)
tip-rev: 5002
data-length: 122944
data-unused: 0
#else
$ hg debugnodemap --metadata
uid: ???????????????? (glob)
tip-rev: 5002
data-length: 122944
data-unused: 0
#endif
Check out of sync nodemap
=========================
First copy old data on the side.
$ mkdir ../tmp-copies
$ cp .hg/store/00changelog-????????????????.nd .hg/store/00changelog.n ../tmp-copies
Nodemap lagging behind
----------------------
make a new commit
$ echo bar2 > bar
$ hg ci -m 'bar2'
$ NODE=`hg log -r tip -T '{node}\n'`
$ hg log -r "$NODE" -T '{rev}\n'
5003
If the nodemap is lagging behind, it can catch up fine
$ hg debugnodemap --metadata
uid: ???????????????? (glob)
tip-rev: 5003
data-length: 123200 (pure !)
data-length: 123200 (rust !)
data-length: 122944 (no-rust no-pure !)
data-unused: 256 (pure !)
data-unused: 256 (rust !)
data-unused: 0 (no-rust no-pure !)
$ cp -f ../tmp-copies/* .hg/store/
$ hg debugnodemap --metadata
uid: ???????????????? (glob)
tip-rev: 5002
data-length: 122944
data-unused: 0
$ hg log -r "$NODE" -T '{rev}\n'
5003