upstream/mercurial-mirror Files · tests/test-revlog-mmapindex.t

httppeer: implement command executor for version 2 peer...

httppeer: implement command executor for version 2 peer Now that we have a new API for issuing commands which is compatible with wire protocol version 2, we can start using it with wire protocol version 2. This commit replaces our hacky implementation of _call() with something a bit more robust based on the new command executor interface. We now have proper support for issuing multiple commands per HTTP request. Each HTTP request maintains its own client reactor. The implementation is similar to the one in the legacy wire protocol. We use a ThreadPoolExecutor for spinning up a thread to read the HTTP response in the background. This allows responses to resolve in any order. While not implemented on the server yet, a client could use concurrent.futures.as_completed() with a collection of futures and handle responses as they arrive from the server. The return value from issued commands is still a simple list of raw or decoded CBOR data. This is still super hacky. We will want a rich data type for representing command responses. But at least this commit gets us one step closer to a proper peer implementation. Differential Revision: https://phab.mercurial-scm.org/D3297

Jun Wu - - Load All Authors

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      create verbosemmap.py

        $ cat << EOF > verbosemmap.py

        > # extension to make util.mmapread verbose

        > 

        > from __future__ import absolute_import

        > 

        > from mercurial import (

        >     extensions,

        >     pycompat,

        >     util,

        > )

        > 

        > def extsetup(ui):

        >     def mmapread(orig, fp):

        >         ui.write(b"mmapping %s\n" % pycompat.bytestr(fp.name))

        >         ui.flush()

        >         return orig(fp)

        > 

        >     extensions.wrapfunction(util, 'mmapread', mmapread)

        > EOF

      setting up base repo

        $ hg init a

        $ cd a

        $ touch a

        $ hg add a

        $ hg commit -qm base

        $ for i in `$TESTDIR/seq.py 1 100` ; do

        > echo $i > a

        > hg commit -qm $i

        > done

      set up verbosemmap extension

        $ cat << EOF >> $HGRCPATH

        > [extensions]

        > verbosemmap=$TESTTMP/verbosemmap.py

        > EOF

      mmap index which is now more than 4k long

        $ hg log -l 5 -T '{rev}\n' --config experimental.mmapindexthreshold=4k

        mmapping $TESTTMP/a/.hg/store/00changelog.i

        100

        99

        98

        97

        96

      do not mmap index which is still less than 32k

        $ hg log -l 5 -T '{rev}\n' --config experimental.mmapindexthreshold=32k

        100

        99

        98

        97

        96

        $ cd ..

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				create verbosemmap.py
				$ cat << EOF > verbosemmap.py
				> # extension to make util.mmapread verbose
				>
				> from __future__ import absolute_import
				>
				> from mercurial import (
				> extensions,
				> pycompat,
				> util,
				> )
				>
				> def extsetup(ui):
				> def mmapread(orig, fp):
				> ui.write(b"mmapping %s\n" % pycompat.bytestr(fp.name))
				> ui.flush()
				> return orig(fp)
				>
				> extensions.wrapfunction(util, 'mmapread', mmapread)
				> EOF

				setting up base repo
				$ hg init a
				$ cd a
				$ touch a
				$ hg add a
				$ hg commit -qm base
				$ for i in `$TESTDIR/seq.py 1 100` ; do
				> echo $i > a
				> hg commit -qm $i
				> done

				set up verbosemmap extension
				$ cat << EOF >> $HGRCPATH
				> [extensions]
				> verbosemmap=$TESTTMP/verbosemmap.py
				> EOF

				mmap index which is now more than 4k long
				$ hg log -l 5 -T '{rev}\n' --config experimental.mmapindexthreshold=4k
				mmapping $TESTTMP/a/.hg/store/00changelog.i
				100
				99
				98
				97
				96

				do not mmap index which is still less than 32k
				$ hg log -l 5 -T '{rev}\n' --config experimental.mmapindexthreshold=32k
				100
				99
				98
				97
				96

				$ cd ..