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view tests/test-serve.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 | 5abc47d4ca6b |
children | b1a1702262c9 |
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#require serve $ hgserve() > { > hg serve -a localhost -d --pid-file=hg.pid -E errors.log -v $@ \ > | sed -e "s/:$HGPORT1\\([^0-9]\\)/:HGPORT1\1/g" \ > -e "s/:$HGPORT2\\([^0-9]\\)/:HGPORT2\1/g" \ > -e 's/http:\/\/[^/]*\//http:\/\/localhost\//' > if [ -f hg.pid ]; then > killdaemons.py hg.pid > fi > echo % errors > cat errors.log > } $ hg init test $ cd test $ echo '[web]' > .hg/hgrc $ echo 'accesslog = access.log' >> .hg/hgrc $ echo "port = $HGPORT1" >> .hg/hgrc Without -v $ hg serve -a localhost -p $HGPORT -d --pid-file=hg.pid -E errors.log $ cat hg.pid >> "$DAEMON_PIDS" $ if [ -f access.log ]; then > echo 'access log created - .hg/hgrc respected' > fi access log created - .hg/hgrc respected errors $ cat errors.log With -v $ hgserve listening at http://localhost/ (bound to *$LOCALIP*:HGPORT1) (glob) (?) % errors With -v and -p HGPORT2 $ hgserve -p "$HGPORT2" listening at http://localhost/ (bound to *$LOCALIP*:HGPORT2) (glob) (?) % errors With -v and -p daytime (should fail because low port) #if no-root no-windows $ KILLQUIETLY=Y $ hgserve -p daytime abort: cannot start server at 'localhost:13': Permission denied abort: child process failed to start % errors $ KILLQUIETLY=N #endif With --prefix foo $ hgserve --prefix foo listening at http://localhost/foo/ (bound to *$LOCALIP*:HGPORT1) (glob) (?) % errors With --prefix /foo $ hgserve --prefix /foo listening at http://localhost/foo/ (bound to *$LOCALIP*:HGPORT1) (glob) (?) % errors With --prefix foo/ $ hgserve --prefix foo/ listening at http://localhost/foo/ (bound to *$LOCALIP*:HGPORT1) (glob) (?) % errors With --prefix /foo/ $ hgserve --prefix /foo/ listening at http://localhost/foo/ (bound to *$LOCALIP*:HGPORT1) (glob) (?) % errors $ "$PYTHON" $RUNTESTDIR/killdaemons.py $DAEMON_PIDS With out of bounds accesses $ rm access.log $ hg serve -a localhost -p $HGPORT -d --prefix some/dir \ > --pid-file=hg.pid -E errors.log $ cat hg.pid >> "$DAEMON_PIDS" $ hg id http://localhost:$HGPORT/some/dir7 abort: HTTP Error 404: Not Found [255] $ hg id http://localhost:$HGPORT/some abort: HTTP Error 404: Not Found [255] $ cat access.log errors.log $LOCALIP - - [$LOGDATE$] "GET /some/dir7?cmd=capabilities HTTP/1.1" 404 - (glob) $LOCALIP - - [$LOGDATE$] "GET /some?cmd=capabilities HTTP/1.1" 404 - (glob) $ cd ..