upstream/mercurial-mirror Files · tests/test-debugcommands.t

revlog: add config variable for limiting delta-chain length...

revlog: add config variable for limiting delta-chain length The current heuristic for deciding between storing delta and full texts is based on ratio of (sizeofdeltas)/(sizeoffulltext). In some cases (for example a manifest for ahuge repo) this approach can result in extremely long delta chains (~30,000) which are very slow to read. (In the case of a manifest ~500ms are added to every hg command because of that). This commit introduces "revlog.maxchainlength" configuration variable that will limit delta chain length.

Mateusz Kwapich - - Load All Authors

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        Patrick Mezard
    
debugrevlog: handle numrevs == numfull case (issue3537)...

              r17188
            
        $ hg init debugrevlog

        $ cd debugrevlog

        $ echo a > a

        $ hg ci -Am adda

        adding a

        $ hg debugrevlog -m

        format : 1

        flags  : inline

        revisions     :  1

            merges    :  0 ( 0.00%)

            normal    :  1 (100.00%)

        revisions     :  1

            full      :  1 (100.00%)

            deltas    :  0 ( 0.00%)

        revision size : 44

            full      : 44 (100.00%)

            deltas    :  0 ( 0.00%)

        avg chain length  : 0

        compression ratio : 0

        uncompressed data size (min/max/avg) : 43 / 43 / 43

        full revision size (min/max/avg)     : 44 / 44 / 44

        delta size (min/max/avg)             : 0 / 0 / 0

        Mads Kiilerich
    
util: introduce util.debugstacktrace for showing a stack trace without crashing...

              r20244
            
        Mateusz Kwapich
    
revlog: add config variable for limiting delta-chain length...

              r23255
            
      Test max chain len

        $ cat >> $HGRCPATH << EOF

        > [revlog]

        > maxchainlen=4

        > EOF

        $ echo "This test checks if maxchainlen config value is respected also it can serve as basic test for debugrevlog -d <file>.\n" >> a

        $ hg ci -m a

        $ echo "b\n" >> a

        $ hg ci -m a

        $ echo "c\n" >> a

        $ hg ci -m a

        $ echo "d\n" >> a

        $ hg ci -m a

        $ echo "e\n" >> a

        $ hg ci -m a

        $ echo "f\n" >> a

        $ hg ci -m a

        $ echo 'g\n' >> a

        $ hg ci -m a

        $ echo 'h\n' >> a

        $ hg ci -m a

        $ hg debugrevlog -d a

        # rev p1rev p2rev start   end deltastart base   p1   p2 rawsize totalsize compression heads chainlen

            0    -1    -1     0   ???          0    0    0    0     ???      ????           ?     1        0 (glob)

            1     0    -1   ???   ???          0    0    0    0     ???      ????           ?     1        1 (glob)

            2     1    -1   ???   ???        ???  ???  ???    0     ???      ????           ?     1        2 (glob)

            3     2    -1   ???   ???        ???  ???  ???    0     ???      ????           ?     1        3 (glob)

            4     3    -1   ???   ???        ???  ???  ???    0     ???      ????           ?     1        4 (glob)

            5     4    -1   ???   ???        ???  ???  ???    0     ???      ????           ?     1        0 (glob)

            6     5    -1   ???   ???        ???  ???  ???    0     ???      ????           ?     1        1 (glob)

            7     6    -1   ???   ???        ???  ???  ???    0     ???      ????           ?     1        2 (glob)

            8     7    -1   ???   ???        ???  ???  ???    0     ???      ????           ?     1        3 (glob)

        $ cd ..

        Mads Kiilerich
    
util: introduce util.debugstacktrace for showing a stack trace without crashing...

              r20244
            
      Test internal debugstacktrace command

        $ cat > debugstacktrace.py << EOF

        > from mercurial.util import debugstacktrace, dst, sys

        > def f():

        >     dst('hello world')

        > def g():

        >     f()

        >     debugstacktrace(skip=-5, f=sys.stdout)

        > g()

        > EOF

        $ python debugstacktrace.py

        hello world at:

        Mads Kiilerich
    
tests: backout a82de9dc4f77, debugstacktrace is now stable, drop workaround

              r20543
            
         debugstacktrace.py:7 in * (glob)

        Mads Kiilerich
    
util: introduce util.debugstacktrace for showing a stack trace without crashing...

              r20244
            
         debugstacktrace.py:5 in g

         debugstacktrace.py:3 in f

        stacktrace at:

        Mads Kiilerich
    
tests: backout a82de9dc4f77, debugstacktrace is now stable, drop workaround

              r20543
            
         debugstacktrace.py:7 *in * (glob)

         debugstacktrace.py:6 *in g (glob)

        Mads Kiilerich
    
util: introduce util.debugstacktrace for showing a stack trace without crashing...

              r20244
            
         */util.py:* in debugstacktrace (glob)

	Site-wide shortcuts
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g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
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g o	Goto repository settings
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t s	Toggle sidebar on some pages

Patrick Mezard debugrevlog: handle numrevs == numfull case (issue3537)...	r17188	$ hg init debugrevlog
		$ cd debugrevlog
		$ echo a > a
		$ hg ci -Am adda
		adding a
		$ hg debugrevlog -m
		format : 1
		flags : inline

		revisions : 1
		merges : 0 ( 0.00%)
		normal : 1 (100.00%)
		revisions : 1
		full : 1 (100.00%)
		deltas : 0 ( 0.00%)
		revision size : 44
		full : 44 (100.00%)
		deltas : 0 ( 0.00%)

		avg chain length : 0
		compression ratio : 0

		uncompressed data size (min/max/avg) : 43 / 43 / 43
		full revision size (min/max/avg) : 44 / 44 / 44
		delta size (min/max/avg) : 0 / 0 / 0
Mads Kiilerich util: introduce util.debugstacktrace for showing a stack trace without crashing...	r20244
Mateusz Kwapich revlog: add config variable for limiting delta-chain length...	r23255	Test max chain len
		$ cat >> $HGRCPATH << EOF
		> [revlog]
		> maxchainlen=4
		> EOF

		$ echo "This test checks if maxchainlen config value is respected also it can serve as basic test for debugrevlog -d <file>.\n" >> a
		$ hg ci -m a
		$ echo "b\n" >> a
		$ hg ci -m a
		$ echo "c\n" >> a
		$ hg ci -m a
		$ echo "d\n" >> a
		$ hg ci -m a
		$ echo "e\n" >> a
		$ hg ci -m a
		$ echo "f\n" >> a
		$ hg ci -m a
		$ echo 'g\n' >> a
		$ hg ci -m a
		$ echo 'h\n' >> a
		$ hg ci -m a
		$ hg debugrevlog -d a
		# rev p1rev p2rev start end deltastart base p1 p2 rawsize totalsize compression heads chainlen
		0 -1 -1 0 ??? 0 0 0 0 ??? ???? ? 1 0 (glob)
		1 0 -1 ??? ??? 0 0 0 0 ??? ???? ? 1 1 (glob)
		2 1 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 2 (glob)
		3 2 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 3 (glob)
		4 3 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 4 (glob)
		5 4 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 0 (glob)
		6 5 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 1 (glob)
		7 6 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 2 (glob)
		8 7 -1 ??? ??? ??? ??? ??? 0 ??? ???? ? 1 3 (glob)
		$ cd ..
Mads Kiilerich util: introduce util.debugstacktrace for showing a stack trace without crashing...	r20244
		Test internal debugstacktrace command

		$ cat > debugstacktrace.py << EOF
		> from mercurial.util import debugstacktrace, dst, sys
		> def f():
		> dst('hello world')
		> def g():
		> f()
		> debugstacktrace(skip=-5, f=sys.stdout)
		> g()
		> EOF
		$ python debugstacktrace.py
		hello world at:
Mads Kiilerich tests: backout a82de9dc4f77, debugstacktrace is now stable, drop workaround	r20543	debugstacktrace.py:7 in * (glob)
Mads Kiilerich util: introduce util.debugstacktrace for showing a stack trace without crashing...	r20244	debugstacktrace.py:5 in g
		debugstacktrace.py:3 in f
		stacktrace at:
Mads Kiilerich tests: backout a82de9dc4f77, debugstacktrace is now stable, drop workaround	r20543	debugstacktrace.py:7 in (glob)
		debugstacktrace.py:6 *in g (glob)
Mads Kiilerich util: introduce util.debugstacktrace for showing a stack trace without crashing...	r20244	/util.py: in debugstacktrace (glob)