Mercurial > hg
view tests/test-wireproto-command-changesetdata.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 | 41263df08109 |
children | 95c4cca641f6 |
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$ . $TESTDIR/wireprotohelpers.sh $ hg init server $ enablehttpv2 server $ cd server $ cat >> .hg/hgrc << EOF > [phases] > publish = false > EOF $ echo a0 > a $ echo b0 > b $ hg -q commit -A -m 'commit 0' $ echo a1 > a $ echo b1 > b $ hg commit -m 'commit 1' $ echo b2 > b $ hg commit -m 'commit 2' $ hg phase --public -r . $ hg -q up -r 0 $ echo a2 > a $ hg commit -m 'commit 3' created new head $ hg log -G -T '{rev}:{node} {desc}\n' @ 3:eae5f82c2e622368d27daecb76b7e393d0f24211 commit 3 | | o 2:0bb8ad894a15b15380b2a2a5b183e20f2a4b28dd commit 2 | | | o 1:7592917e1c3e82677cb0a4bc715ca25dd12d28c1 commit 1 |/ o 0:3390ef850073fbc2f0dfff2244342c8e9229013a commit 0 $ hg serve -p $HGPORT -d --pid-file hg.pid -E error.log $ cat hg.pid > $DAEMON_PIDS No arguments is an invalid request $ sendhttpv2peer << EOF > command changesetdata > EOF creating http peer for wire protocol version 2 sending changesetdata command abort: missing required arguments: revisions! [255] Missing nodes for changesetexplicit results in error $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{b'type': b'changesetexplicit'}] > EOF creating http peer for wire protocol version 2 sending changesetdata command abort: nodes key not present in changesetexplicit revision specifier! [255] changesetexplicitdepth requires nodes and depth keys $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{b'type': b'changesetexplicitdepth'}] > EOF creating http peer for wire protocol version 2 sending changesetdata command abort: nodes key not present in changesetexplicitdepth revision specifier! [255] $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{b'type': b'changesetexplicitdepth', b'nodes': []}] > EOF creating http peer for wire protocol version 2 sending changesetdata command abort: depth key not present in changesetexplicitdepth revision specifier! [255] $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{b'type': b'changesetexplicitdepth', b'depth': 42}] > EOF creating http peer for wire protocol version 2 sending changesetdata command abort: nodes key not present in changesetexplicitdepth revision specifier! [255] changesetdagrange requires roots and heads keys $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{b'type': b'changesetdagrange'}] > EOF creating http peer for wire protocol version 2 sending changesetdata command abort: roots key not present in changesetdagrange revision specifier! [255] $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{b'type': b'changesetdagrange', b'roots': []}] > EOF creating http peer for wire protocol version 2 sending changesetdata command abort: heads key not present in changesetdagrange revision specifier! [255] $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{b'type': b'changesetdagrange', b'heads': [b'dummy']}] > EOF creating http peer for wire protocol version 2 sending changesetdata command abort: roots key not present in changesetdagrange revision specifier! [255] Empty changesetdagrange heads results in an error $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{b'type': b'changesetdagrange', b'heads': [], b'roots': []}] > EOF creating http peer for wire protocol version 2 sending changesetdata command abort: heads key in changesetdagrange cannot be empty! [255] Sending just dagrange heads sends all revisions $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{ > b'type': b'changesetdagrange', > b'roots': [], > b'heads': [ > b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd', > b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11', > ]}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 4 }, { b'node': b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:' }, { b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1' }, { b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd' }, { b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11' } ] Sending root nodes limits what data is sent $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{ > b'type': b'changesetdagrange', > b'roots': [b'\x33\x90\xef\x85\x00\x73\xfb\xc2\xf0\xdf\xff\x22\x44\x34\x2c\x8e\x92\x29\x01\x3a'], > b'heads': [ > b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd', > ]}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 2 }, { b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1' }, { b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd' } ] Requesting data on a single node by node works $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{ > b'type': b'changesetexplicit', > b'nodes': [b'\x33\x90\xef\x85\x00\x73\xfb\xc2\xf0\xdf\xff\x22\x44\x34\x2c\x8e\x92\x29\x01\x3a']}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 1 }, { b'node': b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:' } ] Specifying a noderange and nodes takes union $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[ > { > b'type': b'changesetexplicit', > b'nodes': [b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11'], > }, > { > b'type': b'changesetdagrange', > b'roots': [b'\x75\x92\x91\x7e\x1c\x3e\x82\x67\x7c\xb0\xa4\xbc\x71\x5c\xa2\x5d\xd1\x2d\x28\xc1'], > b'heads': [b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd'], > }] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 2 }, { b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11' }, { b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd' } ] nodesdepth of 1 limits to exactly requested nodes $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{ > b'type': b'changesetexplicitdepth', > b'nodes': [b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11'], > b'depth': 1}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 1 }, { b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11' } ] nodesdepth of 2 limits to first ancestor $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{ > b'type': b'changesetexplicitdepth', > b'nodes': [b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11'], > b'depth': 2}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 2 }, { b'node': b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:' }, { b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11' } ] nodesdepth with multiple nodes $ sendhttpv2peer << EOF > command changesetdata > revisions eval:[{ > b'type': b'changesetexplicitdepth', > b'nodes': [b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11', b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd'], > b'depth': 2}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 4 }, { b'node': b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:' }, { b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1' }, { b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd' }, { b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11' } ] Parents data is transferred upon request $ sendhttpv2peer << EOF > command changesetdata > fields eval:[b'parents'] > revisions eval:[{ > b'type': b'changesetexplicit', > b'nodes': [ > b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11', > ]}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 1 }, { b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11', b'parents': [ b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:', b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' ] } ] Phase data is transferred upon request $ sendhttpv2peer << EOF > command changesetdata > fields eval:[b'phase'] > revisions eval:[{ > b'type': b'changesetexplicit', > b'nodes': [ > b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd', > ]}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 1 }, { b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd', b'phase': b'public' } ] Revision data is transferred upon request $ sendhttpv2peer << EOF > command changesetdata > fields eval:[b'revision'] > revisions eval:[{ > b'type': b'changesetexplicit', > b'nodes': [ > b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11', > ]}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 1 }, { b'fieldsfollowing': [ [ b'revision', 61 ] ], b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11' }, b'1b74476799ec8318045db759b1b4bcc9b839d0aa\ntest\n0 0\na\n\ncommit 3' ] Bookmarks key isn't present if no bookmarks data $ sendhttpv2peer << EOF > command changesetdata > fields eval:[b'bookmarks'] > revisions eval:[{ > b'type': b'changesetdagrange', > b'roots': [], > b'heads': [ > b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd', > b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11', > ]}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 4 }, { b'node': b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:' }, { b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1' }, { b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd' }, { b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11' } ] Bookmarks are sent when requested $ hg -R ../server bookmark -r 0bb8ad894a15b15380b2a2a5b183e20f2a4b28dd book-1 $ hg -R ../server bookmark -r eae5f82c2e622368d27daecb76b7e393d0f24211 book-2 $ hg -R ../server bookmark -r eae5f82c2e622368d27daecb76b7e393d0f24211 book-3 $ sendhttpv2peer << EOF > command changesetdata > fields eval:[b'bookmarks'] > revisions eval:[{ > b'type': b'changesetdagrange', > b'roots': [], > b'heads': [ > b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd', > b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11', > ]}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 4 }, { b'node': b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:' }, { b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1' }, { b'bookmarks': [ b'book-1' ], b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd' }, { b'bookmarks': [ b'book-2', b'book-3' ], b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11' } ] Bookmarks are sent when we make a no-new-revisions request $ sendhttpv2peer << EOF > command changesetdata > fields eval:[b'bookmarks', b'revision'] > revisions eval:[{ > b'type': b'changesetdagrange', > b'roots': [b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11'], > b'heads': [ > b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd', > b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11', > ]}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 2 }, { b'fieldsfollowing': [ [ b'revision', 63 ] ], b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1' }, b'7f144aea0ba742713887b564d57e9d12f12ff382\ntest\n0 0\na\nb\n\ncommit 1', { b'bookmarks': [ b'book-1' ], b'fieldsfollowing': [ [ b'revision', 61 ] ], b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd' }, b'37f0a2d1c28ffe4b879109a7d1bbf8f07b3c763b\ntest\n0 0\nb\n\ncommit 2', { b'bookmarks': [ b'book-2', b'book-3' ], b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11' } ] Multiple fields can be transferred $ sendhttpv2peer << EOF > command changesetdata > fields eval:[b'parents', b'revision'] > revisions eval:[{ > b'type': b'changesetexplicit', > b'nodes': [ > b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11', > ]}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 1 }, { b'fieldsfollowing': [ [ b'revision', 61 ] ], b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11', b'parents': [ b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:', b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' ] }, b'1b74476799ec8318045db759b1b4bcc9b839d0aa\ntest\n0 0\na\n\ncommit 3' ] Base nodes have just their metadata (e.g. phase) transferred TODO this doesn't work $ sendhttpv2peer << EOF > command changesetdata > fields eval:[b'phase', b'parents', b'revision'] > revisions eval:[{ > b'type': b'changesetdagrange', > b'roots': [b'\x33\x90\xef\x85\x00\x73\xfb\xc2\xf0\xdf\xff\x22\x44\x34\x2c\x8e\x92\x29\x01\x3a'], > b'heads': [ > b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd', > b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11', > ]}] > EOF creating http peer for wire protocol version 2 sending changesetdata command response: gen[ { b'totalitems': 3 }, { b'fieldsfollowing': [ [ b'revision', 63 ] ], b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1', b'parents': [ b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:', b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' ], b'phase': b'public' }, b'7f144aea0ba742713887b564d57e9d12f12ff382\ntest\n0 0\na\nb\n\ncommit 1', { b'fieldsfollowing': [ [ b'revision', 61 ] ], b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd', b'parents': [ b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1', b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' ], b'phase': b'public' }, b'37f0a2d1c28ffe4b879109a7d1bbf8f07b3c763b\ntest\n0 0\nb\n\ncommit 2', { b'fieldsfollowing': [ [ b'revision', 61 ] ], b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11', b'parents': [ b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:', b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' ], b'phase': b'draft' }, b'1b74476799ec8318045db759b1b4bcc9b839d0aa\ntest\n0 0\na\n\ncommit 3' ] $ cat error.log