upstream/mercurial-mirror Files · tests/test-merge-symlinks.t

perf: add command for measuring revlog chunk operations...

perf: add command for measuring revlog chunk operations Upcoming commits will teach revlogs to leverage the new compression engine API so that new compression formats can more easily be leveraged in revlogs. We want to be sure this refactoring doesn't regress performance. So this commit introduces "perfrevchunks" to explicitly test performance of reading, decompressing, and recompressing revlog chunks. Here is output when run on the mozilla-unified repo: $ hg perfrevlogchunks -c ! read ! wall 0.346603 comb 0.350000 user 0.340000 sys 0.010000 (best of 28) ! read w/ reused fd ! wall 0.337707 comb 0.340000 user 0.320000 sys 0.020000 (best of 30) ! read batch ! wall 0.013206 comb 0.020000 user 0.000000 sys 0.020000 (best of 221) ! read batch w/ reused fd ! wall 0.013259 comb 0.030000 user 0.010000 sys 0.020000 (best of 222) ! chunk ! wall 1.909939 comb 1.910000 user 1.900000 sys 0.010000 (best of 6) ! chunk batch ! wall 1.750677 comb 1.760000 user 1.740000 sys 0.020000 (best of 6) ! compress ! wall 5.668004 comb 5.670000 user 5.670000 sys 0.000000 (best of 3) $ hg perfrevlogchunks -m ! read ! wall 0.365834 comb 0.370000 user 0.350000 sys 0.020000 (best of 26) ! read w/ reused fd ! wall 0.350160 comb 0.350000 user 0.320000 sys 0.030000 (best of 28) ! read batch ! wall 0.024777 comb 0.020000 user 0.000000 sys 0.020000 (best of 119) ! read batch w/ reused fd ! wall 0.024895 comb 0.030000 user 0.000000 sys 0.030000 (best of 118) ! chunk ! wall 2.514061 comb 2.520000 user 2.480000 sys 0.040000 (best of 4) ! chunk batch ! wall 2.380788 comb 2.380000 user 2.360000 sys 0.020000 (best of 5) ! compress ! wall 9.815297 comb 9.820000 user 9.820000 sys 0.000000 (best of 3) We already see some interesting data, such as how much slower non-batched chunk reading is and that zlib compression appears to be >2x slower than decompression. I didn't have the data when I wrote this commit message, but I ran this on Mozilla's NFS-based Mercurial server and the time for reading with a reused file descriptor was faster. So I think it is worth testing both with and without file descriptor reuse so we can make informed decisions about recycling file descriptors.

Mads Kiilerich - - Load All Authors

File last commit:

r16913:f2719b38 default


                r30451:94ca0e13

default

Download file

             test-merge-symlinks.t
        
                    63 lines
            
             | 1.5 KiB
            
                | text/troff
            
             |
                Tads3Lexer
            
             / tests / test-merge-symlinks.t
          
                    History
                
                 |
                  Annotation
                 | Raw
                 |Copy content
                 |Copy permalink

        $ cat > echo.py <<EOF

        > #!/usr/bin/env python

        > import os, sys

        > try:

        >     import msvcrt

        >     msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)

        >     msvcrt.setmode(sys.stderr.fileno(), os.O_BINARY)

        > except ImportError:

        >     pass

        > 

        > for k in ('HG_FILE', 'HG_MY_ISLINK', 'HG_OTHER_ISLINK', 'HG_BASE_ISLINK'):

        >     print k, os.environ[k]

        > EOF

      Create 2 heads containing the same file, once as

      a file, once as a link. Bundle was generated with:

      # hg init t

      # cd t

      # echo a > a

      # hg ci -qAm t0 -d '0 0'

      # echo l > l

      # hg ci -qAm t1 -d '1 0'

      # hg up -C 0

      # ln -s a l

      # hg ci -qAm t2 -d '2 0'

      # echo l2 > l2

      # hg ci -qAm t3 -d '3 0'

        $ hg init t

        $ cd t

        $ hg -q pull "$TESTDIR/bundles/test-merge-symlinks.hg"

        $ hg up -C 3

        3 files updated, 0 files merged, 0 files removed, 0 files unresolved

      Merge them and display *_ISLINK vars

      merge heads

        $ hg merge --tool="python ../echo.py"

        merging l

        HG_FILE l

        HG_MY_ISLINK 1

        HG_OTHER_ISLINK 0

        HG_BASE_ISLINK 0

        0 files updated, 1 files merged, 0 files removed, 0 files unresolved

        (branch merge, don't forget to commit)

      Test working directory symlink bit calculation wrt copies,

      especially on non-supporting systems.

      merge working directory

        $ hg up -C 2

        1 files updated, 0 files merged, 1 files removed, 0 files unresolved

        $ hg copy l l2

        $ HGMERGE="python ../echo.py" hg up 3

        merging l2

        HG_FILE l2

        HG_MY_ISLINK 1

        HG_OTHER_ISLINK 0

        HG_BASE_ISLINK 0

        0 files updated, 1 files merged, 0 files removed, 0 files unresolved

        $ cd ..

	Site-wide shortcuts
/	Use quick search box
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
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

				$ cat > echo.py <<EOF
				> #!/usr/bin/env python
				> import os, sys
				> try:
				> import msvcrt
				> msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
				> msvcrt.setmode(sys.stderr.fileno(), os.O_BINARY)
				> except ImportError:
				> pass
				>
				> for k in ('HG_FILE', 'HG_MY_ISLINK', 'HG_OTHER_ISLINK', 'HG_BASE_ISLINK'):
				> print k, os.environ[k]
				> EOF

				Create 2 heads containing the same file, once as
				a file, once as a link. Bundle was generated with:

				# hg init t
				# cd t
				# echo a > a
				# hg ci -qAm t0 -d '0 0'
				# echo l > l
				# hg ci -qAm t1 -d '1 0'
				# hg up -C 0
				# ln -s a l
				# hg ci -qAm t2 -d '2 0'
				# echo l2 > l2
				# hg ci -qAm t3 -d '3 0'

				$ hg init t
				$ cd t
				$ hg -q pull "$TESTDIR/bundles/test-merge-symlinks.hg"
				$ hg up -C 3
				3 files updated, 0 files merged, 0 files removed, 0 files unresolved

				Merge them and display *_ISLINK vars
				merge heads

				$ hg merge --tool="python ../echo.py"
				merging l
				HG_FILE l
				HG_MY_ISLINK 1
				HG_OTHER_ISLINK 0
				HG_BASE_ISLINK 0
				0 files updated, 1 files merged, 0 files removed, 0 files unresolved
				(branch merge, don't forget to commit)

				Test working directory symlink bit calculation wrt copies,
				especially on non-supporting systems.
				merge working directory

				$ hg up -C 2
				1 files updated, 0 files merged, 1 files removed, 0 files unresolved
				$ hg copy l l2
				$ HGMERGE="python ../echo.py" hg up 3
				merging l2
				HG_FILE l2
				HG_MY_ISLINK 1
				HG_OTHER_ISLINK 0
				HG_BASE_ISLINK 0
				0 files updated, 1 files merged, 0 files removed, 0 files unresolved

				$ cd ..