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Kjetil Barvik 36419c8ee4 check_updates(): effective removal of cache entries marked CE_REMOVE 
Below is oprofile output from GIT command 'git chekcout -q my-v2.6.25'
(move from tag v2.6.27 to tag v2.6.25 of the Linux kernel):

CPU: Core 2, speed 1999.95 MHz (estimated)
Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a unit
                         mask of 0x00 (Unhalted core cycles) count 20000
Counted INST_RETIRED_ANY_P events (number of instructions retired) with a
                           unit mask of 0x00 (No unit mask) count 20000
CPU_CLK_UNHALT...|INST_RETIRED:2...|
  samples|      %|  samples|      %|
------------------------------------
   409247 100.000    342878 100.000 git
        CPU_CLK_UNHALT...|INST_RETIRED:2...|
          samples|      %|  samples|      %|
        ------------------------------------
           260476 63.6476    257843 75.1996 libz.so.1.2.3
           100876 24.6492     64378 18.7758 kernel-2.6.28.4_2.vmlinux
            30850  7.5382      7874  2.2964 libc-2.9.so
            14775  3.6103      8390  2.4469 git
             2020  0.4936      4325  1.2614 libcrypto.so.0.9.8
              191  0.0467        32  0.0093 libpthread-2.9.so
               58  0.0142        36  0.0105 ld-2.9.so
                1 2.4e-04         0       0 libldap-2.3.so.0.2.31

Detail list of the top 20 function entries (libz counted in one blob):

CPU_CLK_UNHALTED  INST_RETIRED_ANY_P
samples  %        samples  %        image name               symbol name
260476   63.6862  257843   75.2725  libz.so.1.2.3            /lib/libz.so.1.2.3
16587     4.0555  3636      1.0615  libc-2.9.so              memcpy
7710      1.8851  277       0.0809  libc-2.9.so              memmove
3679      0.8995  1108      0.3235  kernel-2.6.28.4_2.vmlinux d_validate
3546      0.8670  2607      0.7611  kernel-2.6.28.4_2.vmlinux __getblk
3174      0.7760  1813      0.5293  libc-2.9.so              _int_malloc
2396      0.5858  3681      1.0746  kernel-2.6.28.4_2.vmlinux copy_to_user
2270      0.5550  2528      0.7380  kernel-2.6.28.4_2.vmlinux __link_path_walk
2205      0.5391  1797      0.5246  kernel-2.6.28.4_2.vmlinux ext4_mark_iloc_dirty
2103      0.5142  1203      0.3512  kernel-2.6.28.4_2.vmlinux find_first_zero_bit
2077      0.5078  997       0.2911  kernel-2.6.28.4_2.vmlinux do_get_write_access
2070      0.5061  514       0.1501  git                      cache_name_compare
2043      0.4995  1501      0.4382  kernel-2.6.28.4_2.vmlinux rcu_irq_exit
2022      0.4944  1732      0.5056  kernel-2.6.28.4_2.vmlinux __ext4_get_inode_loc
2020      0.4939  4325      1.2626  libcrypto.so.0.9.8       /usr/lib/libcrypto.so.0.9.8
1965      0.4804  1384      0.4040  git                      patch_delta
1708      0.4176  984       0.2873  kernel-2.6.28.4_2.vmlinux rcu_sched_grace_period
1682      0.4112  727       0.2122  kernel-2.6.28.4_2.vmlinux sysfs_slab_alias
1659      0.4056  290       0.0847  git                      find_pack_entry_one
1480      0.3619  1307      0.3816  kernel-2.6.28.4_2.vmlinux ext4_writepage_trans_blocks

Notice the memmove line, where the CPU did 7710 / 277 = 27.8 cycles
per instruction, and compared to the total cycles spent inside the
source code of GIT for this command, all the memmove() calls
translates to (7710 * 100) / 14775 = 52.2% of this.

Retesting with a GIT program compiled for gcov usage, I found out that
the memmove() calls came from remove_index_entry_at() in read-cache.c,
where we have:

        memmove(istate->cache + pos,
                istate->cache + pos + 1,
                (istate->cache_nr - pos) * sizeof(struct cache_entry *));

remove_index_entry_at() is called 4902 times from check_updates() in
unpack-trees.c, and each time called we move each cache_entry pointers
(from the removed one) one step to the left.

Since we have 28828 entries in the cache this time, and if we on
average move half of them each time, we in total move approximately
4902 * 0.5 * 28828 * 4 = 282 629 712 bytes, or twice this amount if
each pointer is 8 bytes (64 bit).

OK, is seems that the function check_updates() is called 28 times, so
the estimated guess above had been more correct if check_updates() had
been called only once, but the point is: we get lots of bytes moved.

To fix this, and use an O(N) algorithm instead, where N is the number
of cache_entries, we delete/remove all entries in one loop through all
entries.

From a retest, the new remove_marked_cache_entries() from the patch
below, ended up with the following output line from oprofile:

46        0.0105  15        0.0041  git                      remove_marked_cache_entries

If we can trust the numbers from oprofile in this case, we saved
approximately ((7710 - 46) * 20000) / (2 * 1000 * 1000 * 1000) = 0.077
seconds CPU time with this fix for this particular test.  And notice
that now the CPU did only 46 / 15 = 3.1 cycles/instruction.

Signed-off-by: Kjetil Barvik <barvik@broadpark.no>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-02-18 17:11:21 -08:00
arm fix openssl headers conflicting with custom SHA1 implementations 2008-10-02 18:06:56 -07:00
compat Windows: Fix signal numbers 2009-01-21 22:46:52 -08:00
contrib completion: Get rid of tabbed indentation in comments. Replace with spaces. 2009-02-08 22:07:49 -08:00
Documentation lstat_cache(): swap func(length, string) into func(string, length) 2009-02-09 20:59:26 -08:00
git-gui Merge git://repo.or.cz/git-gui 2008-12-17 21:56:48 -08:00
gitk-git Merge git://git.kernel.org/pub/scm/gitk/gitk 2008-12-21 18:31:12 -08:00
gitweb Merge branch 'maint' 2009-02-08 22:07:53 -08:00
mozilla-sha1 fix openssl headers conflicting with custom SHA1 implementations 2008-10-02 18:06:56 -07:00
perl Merge branch 'pb/maint-git-pm-false-dir' into maint 2009-01-23 19:02:41 -08:00
ppc fix openssl headers conflicting with custom SHA1 implementations 2008-10-02 18:06:56 -07:00
t Add two extra tests for git rebase 2009-02-08 21:40:52 -08:00
templates Fix permission bits on sources checked out with an overtight umask 2008-09-09 13:32:32 -07:00
xdiff Merge branch 'kc/maint-diff-bwi-fix' into maint 2009-02-05 17:52:22 -08:00
.gitattributes git-gui: Use gitattribute "encoding" for file content display 2008-09-24 12:48:31 -07:00
.gitignore Merge branch 'js/notes' 2009-02-05 19:40:39 -08:00
.mailmap .mailmap update 2008-07-19 11:25:51 -07:00
abspath.c make_absolute_path(): check bounds when seeing an overlong symlink 2008-12-17 13:36:34 -08:00
alias.c Move split_cmdline() to alias.c 2008-06-30 22:45:50 -07:00
alloc.c Clean up object creation to use more common code 2007-04-16 23:36:16 -07:00
archive-tar.c Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializer 2008-10-12 12:36:19 -07:00
archive-zip.c archive: remove unused headers 2008-07-19 11:17:43 -07:00
archive.c Merge branch 'maint' 2008-10-26 16:21:08 -07:00
archive.h archive: declare struct archiver where it's needed 2008-07-25 17:21:04 -07:00
attr.c Fix buffer overflow in prepare_attr_stack 2008-07-16 14:05:50 -07:00
attr.h Fix funny types used in attribute value representation 2007-04-18 16:17:13 -07:00
base85.c decode_85(): fix missing return. 2007-05-30 15:03:50 -07:00
blob.c Clean up object creation to use more common code 2007-04-16 23:36:16 -07:00
blob.h
branch.c Merge branch 'jc/maint-co-track' 2008-10-21 17:58:11 -07:00
branch.h branch: optionally setup branch.*.merge from upstream local branches 2008-02-19 21:17:45 -08:00
builtin-add.c lstat_cache(): swap func(length, string) into func(string, length) 2009-02-09 20:59:26 -08:00
builtin-annotate.c War on whitespace 2007-06-07 00:04:01 -07:00
builtin-apply.c lstat_cache(): swap func(length, string) into func(string, length) 2009-02-09 20:59:26 -08:00
builtin-archive.c git-archive: work in bare repos 2008-10-26 16:19:59 -07:00
builtin-blame.c builtin-blame.c: Use utf8_strwidth for author's names 2009-02-04 16:30:45 -08:00
builtin-branch.c Make has_commit() non-static 2009-01-28 11:33:03 -08:00
builtin-bundle.c Start conforming code to "git subcmd" style 2008-08-30 13:50:48 -07:00
builtin-cat-file.c remove trailing LF in die() messages 2009-01-05 13:01:01 -08:00
builtin-check-attr.c Fix non-literal format in printf-style calls 2008-11-11 14:50:02 -08:00
builtin-check-ref-format.c Start conforming code to "git subcmd" style 2008-08-30 13:50:48 -07:00
builtin-checkout-index.c parse-opt: migrate builtin-checkout-index. 2008-10-19 14:38:04 -07:00
builtin-checkout.c Merge branch 'tr/previous-branch' 2009-01-28 15:00:27 -08:00
builtin-clean.c Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializer 2008-10-12 12:36:19 -07:00
builtin-clone.c Merge branch 'jk/signal-cleanup' 2009-01-31 17:43:56 -08:00
builtin-commit-tree.c Merge branch 'bc/maint-diff-hunk-header-fix' into bc/master-diff-hunk-header-fix 2008-09-18 20:32:50 -07:00
builtin-commit.c Merge branch 'mh/maint-commit-color-status' into maint 2009-01-28 23:42:53 -08:00
builtin-config.c Use git_pathdup instead of xstrdup(git_path(...)) 2008-10-30 17:52:24 -07:00
builtin-count-objects.c add is_dot_or_dotdot inline function 2009-01-11 13:21:57 -08:00
builtin-describe.c Merge branch 'sp/maint-describe-all-tag-warning' into maint 2008-12-27 14:21:15 -08:00
builtin-diff-files.c Add cache preload facility 2008-11-14 19:11:49 -08:00
builtin-diff-index.c diff*: fix worktree setup 2008-08-28 20:50:10 -07:00
builtin-diff-tree.c Fix git-diff-tree --stdin 2008-09-10 15:00:17 -07:00
builtin-diff.c reorder ALLOW_TEXTCONV option setting 2008-12-07 19:59:25 -08:00
builtin-fast-export.c fast-export: print usage when no options specified 2009-01-03 14:24:15 -08:00
builtin-fetch--tool.c refactor signal handling for cleanup functions 2009-01-21 22:46:53 -08:00
builtin-fetch-pack.c Merge branch 'maint' 2008-12-07 15:13:02 -08:00
builtin-fetch.c refactor signal handling for cleanup functions 2009-01-21 22:46:53 -08:00
builtin-fmt-merge-msg.c Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializer 2008-10-12 12:36:19 -07:00
builtin-for-each-ref.c Fix potentially dangerous uses of mkpath and git_path 2008-10-26 22:25:09 -07:00
builtin-fsck.c fsck: check loose objects from alternate object stores by default 2009-01-30 19:23:22 -08:00
builtin-gc.c Move run_hook() from builtin-commit.c into run-command.c (libgit) 2009-01-17 17:16:24 -08:00
builtin-grep.c Merge branch 'maint-1.6.0' into maint 2009-02-03 00:32:29 -08:00
builtin-help.c Move computation of absolute paths from Makefile to runtime (in preparation for RUNTIME_PREFIX) 2009-01-26 00:26:05 -08:00
builtin-http-fetch.c Merge branch 'ho/dashless' 2008-09-09 22:57:35 -07:00
builtin-init-db.c remove trailing LF in die() messages 2009-01-05 13:01:01 -08:00
builtin-log.c Merge branch 'jc/maint-format-patch-o-relative' into maint 2009-01-28 23:56:13 -08:00
builtin-ls-files.c remove pathspec_match, use match_pathspec instead 2009-01-14 19:18:44 -08:00
builtin-ls-remote.c git ls-remote: make usage string match manpage 2008-11-11 13:24:00 -08:00
builtin-ls-tree.c Document git-ls-tree --full-tree 2009-01-01 04:43:23 -08:00
builtin-mailinfo.c mailinfo: cleanup extra spaces for complex 'From:' 2009-02-01 12:11:15 -08:00
builtin-mailsplit.c Rename path_list to string_list 2008-07-21 19:11:50 -07:00
builtin-merge-base.c parse-opt: migrate git-merge-base. 2008-10-02 18:46:02 -07:00
builtin-merge-file.c merge-file: handle freopen() failure 2008-12-26 19:10:02 -08:00
builtin-merge-ours.c git-merge-ours: make it a builtin. 2007-11-22 14:21:59 -08:00
builtin-merge-recursive.c remove trailing LF in die() messages 2009-01-05 13:01:01 -08:00
builtin-merge.c Replace deprecated dashed git commands in usage 2009-02-04 15:08:49 -08:00
builtin-mv.c builtin-mv.c: check for unversionned files before looking at the destination. 2009-02-04 11:07:42 -08:00
builtin-name-rev.c Merge branch 'maint' 2008-08-03 14:14:10 -07:00
builtin-pack-objects.c Merge branch 'lt/maint-wrap-zlib' into maint 2009-02-05 18:01:00 -08:00
builtin-pack-refs.c Make usage strings dash-less 2008-07-13 14:12:48 -07:00
builtin-prune-packed.c Make usage strings dash-less 2008-07-13 14:12:48 -07:00
builtin-prune.c add is_dot_or_dotdot inline function 2009-01-11 13:21:57 -08:00
builtin-push.c Merge branch 'maint' 2008-10-08 08:05:43 -07:00
builtin-read-tree.c checkout: Fix "initial checkout" detection 2008-11-12 14:16:50 -08:00
builtin-receive-pack.c Merge branch 'jc/refuse-push-to-current' 2009-02-05 19:40:36 -08:00
builtin-reflog.c Merge branch 'ar/maint-mksnpath' into ar/mksnpath 2008-10-30 18:08:58 -07:00
builtin-remote.c Merge branch 'js/maint-remote-remove-mirror' 2009-02-05 19:40:41 -08:00
builtin-rerere.c add is_dot_or_dotdot inline function 2009-01-11 13:21:57 -08:00
builtin-reset.c Add 'merge' mode to 'git reset' 2008-12-02 15:15:58 -08:00
builtin-rev-list.c rev-list: fix showing distance when using --bisect-all 2009-02-08 12:48:28 -08:00
builtin-rev-parse.c Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializer 2008-10-12 12:36:19 -07:00
builtin-revert.c git-revert: record the parent against which a revert was made 2008-12-21 18:32:04 -08:00
builtin-rm.c git add --intent-to-add: fix removal of cached emptiness 2008-11-28 19:58:24 -08:00
builtin-send-pack.c send-pack: do not send unknown object name from ".have" to pack-objects 2009-01-27 23:46:59 -08:00
builtin-shortlog.c Merge branch 'rs/maint-shortlog-foldline' 2009-01-17 23:05:23 -08:00
builtin-show-branch.c Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializer 2008-10-12 12:36:19 -07:00
builtin-show-ref.c 'git foo' program identifies itself without dash in die() messages 2008-08-31 09:39:19 -07:00
builtin-stripspace.c Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializer 2008-10-12 12:36:19 -07:00
builtin-symbolic-ref.c symbolic ref: refuse non-ref targets in HEAD 2009-01-29 01:00:48 -08:00
builtin-tag.c git-tag: Add --contains option 2009-01-28 11:33:51 -08:00
builtin-tar-tree.c Cosmetical command name fix 2008-09-15 23:11:35 -07:00
builtin-unpack-objects.c Merge branch 'lt/maint-wrap-zlib' into maint 2009-02-05 18:01:00 -08:00
builtin-update-index.c lstat_cache(): swap func(length, string) into func(string, length) 2009-02-09 20:59:26 -08:00
builtin-update-ref.c Fix git update-ref --no-deref -d. 2008-10-26 14:44:25 -07:00
builtin-upload-archive.c archive: define MAX_ARGS where it's needed 2008-07-25 17:20:55 -07:00
builtin-verify-pack.c Replace deprecated dashed git commands in usage 2009-02-04 15:08:49 -08:00
builtin-verify-tag.c builtin-verify-tag: fix -v option parsing 2008-07-28 23:02:11 -07:00
builtin-write-tree.c git add --intent-to-add: do not let an empty blob be committed by accident 2008-11-30 17:59:19 -08:00
builtin.h Merge branch 'jc/alternate-push' 2008-09-25 09:39:24 -07:00
bundle.c Merge branch 'js/maint-all-implies-HEAD' 2009-01-25 17:13:02 -08:00
bundle.h Move bundle specific stuff into bundle.[ch] 2007-09-19 03:22:30 -07:00
cache-tree.c git add --intent-to-add: do not let an empty blob be committed by accident 2008-11-30 17:59:19 -08:00
cache-tree.h cache-tree.c: make cache_tree_find() static 2008-07-16 08:50:27 -07:00
cache.h check_updates(): effective removal of cache entries marked CE_REMOVE 2009-02-18 17:11:21 -08:00
check_bindir Move all dashed-form commands to libexecdir 2008-06-19 16:00:38 -07:00
check-builtins.sh
check-racy.c ce_match_stat, run_diff_files: use symbolic constants for readability 2007-11-10 00:24:51 -08:00
color.c Merge branch 'js/diff-color-words' 2009-01-25 17:13:29 -08:00
color.h Merge branch 'js/diff-color-words' 2009-01-25 17:13:29 -08:00
combine-diff.c show_patch_diff(): remove a call to fstat() 2009-02-09 20:59:26 -08:00
command-list.txt Add a script to edit/inspect notes 2008-12-21 02:47:22 -08:00
commit.c Merge branch 'js/notes' 2009-02-05 19:40:39 -08:00
commit.h Make has_commit() non-static 2009-01-28 11:33:03 -08:00
config.c Introduce commit notes 2008-12-21 02:47:21 -08:00
config.mak.in config.mak.in: define paths without trailing slash 2009-02-05 00:29:23 -08:00
configure.ac Fix naming scheme for configure cache variables. 2009-01-21 00:12:25 -08:00
connect.c remove trailing LF in die() messages 2009-01-05 13:01:01 -08:00
convert.c Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializer 2008-10-12 12:36:19 -07:00
copy.c copy.c: copy_fd - correctly report write errors 2008-04-22 21:21:08 -07:00
COPYING
csum-file.c Merge branch 'maint' 2008-10-10 08:39:20 -07:00
csum-file.h Merge branch 'maint' 2008-10-10 08:39:20 -07:00
ctype.c Add is_regex_special() 2009-01-17 18:30:41 -08:00
daemon.c Add calls to git_extract_argv0_path() in programs that call git_config_* 2009-01-26 00:26:05 -08:00
date.c date/time: do not get confused by fractional seconds 2008-11-13 09:06:58 -08:00
decorate.c decorate: allow const objects to be decorated 2008-08-20 13:30:49 -07:00
decorate.h decorate: allow const objects to be decorated 2008-08-20 13:30:49 -07:00
delta.h Support fetching the memory usage of a delta index 2007-07-12 14:32:35 -07:00
diff-delta.c fix style of a few comments in diff-delta.c 2007-12-18 15:22:28 -08:00
diff-lib.c lstat_cache(): swap func(length, string) into func(string, length) 2009-02-09 20:59:26 -08:00
diff-no-index.c Fix 'git diff --no-index' with a non-existing symlink target 2009-01-30 21:11:24 -08:00
diff.c Merge branch 'jc/maint-split-diff-metainfo' 2009-01-31 18:07:42 -08:00
diff.h color-words: take an optional regular expression describing words 2009-01-17 10:43:08 -08:00
diffcore-break.c rename: Break filepairs with different types. 2007-12-02 02:24:46 -08:00
diffcore-delta.c optimize diffcore-delta by sorting hash entries. 2007-10-04 00:05:36 -07:00
diffcore-order.c Use xmemdupz() in many places. 2007-09-18 17:42:17 -07:00
diffcore-pickaxe.c War on whitespace 2007-06-07 00:04:01 -07:00
diffcore-rename.c Rename detection: Avoid repeated filespec population 2009-01-21 00:14:12 -08:00
diffcore.h Merge branch 'maint' 2008-11-02 16:36:40 -08:00
dir.c lstat_cache(): swap func(length, string) into func(string, length) 2009-02-09 20:59:26 -08:00
dir.h Allow cloning to an existing empty directory 2009-01-11 13:26:29 -08:00
editor.c Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializer 2008-10-12 12:36:19 -07:00
entry.c write_entry(): use fstat() instead of lstat() when file is open 2009-02-09 20:59:26 -08:00
environment.c Introduce commit notes 2008-12-21 02:47:21 -08:00
exec_cmd.c Compute prefix at runtime if RUNTIME_PREFIX is set 2009-01-26 00:26:05 -08:00
exec_cmd.h Refactor git_set_argv0_path() to git_extract_argv0_path() 2009-01-26 00:26:05 -08:00
fast-import.c Add calls to git_extract_argv0_path() in programs that call git_config_* 2009-01-26 00:26:05 -08:00
fetch-pack.h Teach fetch-pack/upload-pack about --include-tag 2008-03-04 23:28:14 -08:00
fixup-builtins make remove-dashes: apply to scripts and programs as well, not just to builtins 2008-07-11 21:13:17 -07:00
fsck.c Merge branch 'maint' 2008-11-11 14:49:50 -08:00
fsck.h add common fsck error printing function 2008-02-25 23:57:35 -08:00
generate-cmdlist.sh generate-cmdlist.sh: avoid selecting synopsis at wrong place 2008-11-30 18:16:32 -08:00
git-add--interactive.perl add -p: get rid of Git.pm warnings about unitialized values 2009-02-08 13:06:33 -08:00
git-am.sh Merge branch 'ns/am-slacker' 2009-02-04 13:07:02 -08:00
git-archimport.perl Make usage strings dash-less 2008-07-13 14:12:48 -07:00
git-bisect.sh bisect view: call gitk if Cygwin's SESSIONNAME variable is set 2009-01-03 14:25:27 -08:00
git-compat-util.h Add is_regex_special() 2009-01-17 18:30:41 -08:00
git-cvsexportcommit.perl Make usage strings dash-less 2008-07-13 14:12:48 -07:00
git-cvsimport.perl Merge branch 'maint' 2008-08-05 21:21:08 -07:00
git-cvsserver.perl git-cvsserver: run post-update hook *after* update. 2009-01-30 21:11:46 -08:00
git-filter-branch.sh Merge branch 'js/filter-branch-submodule' 2009-02-07 11:09:48 -08:00
git-instaweb.sh Make usage strings dash-less 2008-07-13 14:12:48 -07:00
git-lost-found.sh lost-found: use git rev-parse -q 2008-12-03 14:27:17 -08:00
git-merge-octopus.sh git-merge-octopus: use (merge-base A (merge B C D E...)) for stepwise merge 2008-07-30 00:20:51 -07:00
git-merge-one-file.sh git-merge-one-file: fix longstanding stupid thinko 2008-03-18 22:17:17 -07:00
git-merge-resolve.sh Fixing comment in merge strategies 2007-08-30 17:18:22 -07:00
git-mergetool.sh Merge branch 'cb/mergetool' 2009-02-05 19:40:35 -08:00
git-notes.sh Add a script to edit/inspect notes 2008-12-21 02:47:22 -08:00
git-parse-remote.sh Rewrite "git-frotz" to "git frotz" 2007-07-02 22:52:14 -07:00
git-pull.sh pull: use git rev-parse -q 2008-12-03 14:27:17 -08:00
git-quiltimport.sh Rename .git/rebase to .git/rebase-apply 2008-07-21 18:51:47 -07:00
git-rebase--interactive.sh Merge branch 'js/maint-rebase-i-submodule' 2009-01-31 18:07:55 -08:00
git-rebase.sh rebase: learn to rebase root commit 2009-01-11 23:03:36 -08:00
git-relink.perl Make usage strings dash-less 2008-07-13 14:12:48 -07:00
git-repack.sh repack: only unpack-unreachable if we are deleting redundant packs 2008-11-14 21:39:10 -08:00
git-request-pull.sh request-pull: make usage string match manpage 2008-11-17 02:27:18 -08:00
git-send-email.perl send-email: futureproof split_addrs() sub 2008-12-21 01:57:59 -08:00
git-sh-setup.sh git-sh-setup: Fix scripts whose PWD is a symlink to a work-dir on OS X 2009-01-05 11:46:58 -08:00
git-stash.sh Revert "git-stash: use git rev-parse -q" 2008-12-07 17:30:35 -08:00
git-submodule.sh submodule: use git rev-parse -q 2008-12-03 14:27:18 -08:00
git-svn.perl git-svn: add --ignore-paths option for fetching 2009-01-25 17:01:47 -08:00
GIT-VERSION-GEN GIT 1.6.1.3 2009-02-07 00:51:47 -08:00
git-web--browse.sh git-web--browse: Fix check for /bin/start 2009-02-09 00:06:36 -08:00
git.c Merge branch 'jk/maint-cleanup-after-exec-failure' 2009-02-03 00:26:12 -08:00
git.spec.in Merge branch 'maint-1.6.0' into maint 2009-02-05 19:38:58 -08:00
graph.c Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializer 2008-10-12 12:36:19 -07:00
graph.h graph.c: make many functions static 2008-09-25 08:00:28 -07:00
grep.c Add is_regex_special() 2009-01-17 18:30:41 -08:00
grep.h grep: don't call regexec() for fixed strings 2009-01-09 21:35:56 -08:00
hash-object.c Add calls to git_extract_argv0_path() in programs that call git_config_* 2009-01-26 00:26:05 -08:00
hash.c Add 'const' where appropriate to index handling functions 2008-03-09 00:43:48 -08:00
hash.h Add 'const' where appropriate to index handling functions 2008-03-09 00:43:48 -08:00
help.c git wrapper: also use aliases to correct mistyped commands 2008-09-11 23:05:39 -07:00
help.h Merge branch 'ar/autospell' 2008-09-07 23:52:16 -07:00
http-push.c Merge branch 'rc/http-push' 2009-02-05 19:40:36 -08:00
http-walker.c Merge branch 'lt/maint-wrap-zlib' into maint 2009-02-05 18:01:00 -08:00
http.c Merge branch 'maint' 2008-12-07 15:13:02 -08:00
http.h Work around gcc warnings from curl headers 2008-07-04 00:37:40 -07:00
ident.c Add backslash to list of 'crud' characters in real name 2008-12-02 15:29:13 -08:00
imap-send.c Add calls to git_extract_argv0_path() in programs that call git_config_* 2009-01-26 00:26:05 -08:00
index-pack.c Merge branch 'lt/maint-wrap-zlib' into maint 2009-02-05 18:01:00 -08:00
INSTALL Add support for a pdf version of the user manual 2008-12-10 19:17:43 -08:00
levenshtein.c Document levenshtein.c 2008-11-23 19:23:34 -08:00
levenshtein.h git wrapper: DWIM mistyped commands 2008-08-31 10:14:58 -07:00
list-objects.c list-objects.c::process_tree/blob: check for NULL 2008-02-18 19:25:26 -08:00
list-objects.h
ll-merge.c merge-recursive: use strbuf_expand() instead of interpolate() 2008-11-23 19:55:52 -08:00
ll-merge.h merge-recursive: split low-level merge functions out. 2008-02-18 00:46:13 -08:00
lockfile.c refactor signal handling for cleanup functions 2009-01-21 22:46:53 -08:00
log-tree.c Fix machine-parseability of 'git log --source' 2008-11-16 00:24:41 -08:00
log-tree.h Add a 'source' decorator for commits 2008-11-04 00:08:03 -08:00
mailmap.c Rename path_list to string_list 2008-07-21 19:11:50 -07:00
mailmap.h Rename path_list to string_list 2008-07-21 19:11:50 -07:00
Makefile Merge branch 'js/notes' 2009-02-05 19:40:39 -08:00
match-trees.c Improved const correctness for strings 2007-10-21 01:43:27 -04:00
merge-file.c Always initialize xpparam_t to 0 2008-10-25 12:09:31 -07:00
merge-index.c Replace deprecated dashed git commands in usage 2009-02-04 15:08:49 -08:00
merge-recursive.c Merge branch 'js/maint-merge-recursive-r-d-conflict' into maint 2009-01-13 01:15:19 -08:00
merge-recursive.h merge-recursive: move current_{file,directory}_set to struct merge_options 2008-09-04 22:50:43 -07:00
merge-tree.c Replace deprecated dashed git commands in usage 2009-02-04 15:08:49 -08:00
mktag.c Replace deprecated dashed git commands in usage 2009-02-04 15:08:49 -08:00
mktree.c Replace deprecated dashed git commands in usage 2009-02-04 15:08:49 -08:00
name-hash.c Make hash_name_lookup able to do case-independent lookups 2008-04-09 01:22:25 -07:00
notes.c git-notes: fix printing of multi-line notes 2009-01-14 14:54:41 -08:00
notes.h Introduce commit notes 2008-12-21 02:47:21 -08:00
object.c bundle: allow the same ref to be given more than once 2009-01-17 23:00:31 -08:00
object.h Merge branch 'js/maint-all-implies-HEAD' into maint 2009-02-05 17:54:12 -08:00
pack-check.c fix openssl headers conflicting with custom SHA1 implementations 2008-10-02 18:06:56 -07:00
pack-redundant.c Add calls to git_extract_argv0_path() in programs that call git_config_* 2009-01-26 00:26:05 -08:00
pack-refs.c Enhance hold_lock_file_for_{update,append}() API 2008-10-19 12:35:37 -07:00
pack-refs.h Move pack_refs() and friends into libgit 2008-06-19 15:53:13 -07:00
pack-revindex.c make find_pack_revindex() aware of the nasty world 2008-11-02 15:22:35 -08:00
pack-revindex.h discard revindex data when pack list changes 2008-08-22 22:00:22 -07:00
pack-write.c fix openssl headers conflicting with custom SHA1 implementations 2008-10-02 18:06:56 -07:00
pack.h improve reliability of fixup_pack_header_footer() 2008-08-29 21:51:27 -07:00
pager.c pager: do wait_for_pager on signal death 2009-01-21 22:46:53 -08:00
parse-options.c Make opt_parse_with_commit() non-static 2009-01-28 11:32:27 -08:00
parse-options.h Make opt_parse_with_commit() non-static 2009-01-28 11:32:27 -08:00
patch-delta.c
patch-id.c Replace deprecated dashed git commands in usage 2009-02-04 15:08:49 -08:00
patch-ids.c Make the diff_options bitfields be an unsigned with explicit masks. 2007-11-11 16:54:15 -08:00
patch-ids.h Refactor patch-id filtering out of git-cherry and git-format-patch. 2007-04-11 20:02:03 -07:00
path.c validate_headref: tighten ref-matching to just branches 2009-01-29 01:00:43 -08:00
pkt-line.c Cleanup xread() loops to use read_in_full() 2008-05-03 22:15:25 -07:00
pkt-line.h
preload-index.c Makefile: introduce NO_PTHREADS 2008-12-02 15:29:12 -08:00
pretty.c Merge branch 'js/notes' 2009-02-05 19:40:39 -08:00
progress.c progress.c: avoid use of dynamic-sized array 2008-06-08 13:56:32 -07:00
progress.h nicer display of thin pack completion 2007-11-08 15:43:41 -08:00
quote.c shrink git-shell by avoiding redundant dependencies 2008-06-27 23:22:00 -07:00
quote.h Make private quote_path() in wt-status.c available as quote_path_relative() 2008-03-07 21:22:25 -08:00
reachable.c Merge branch 'mk/maint-parse-careful' 2008-02-18 20:56:01 -08:00
reachable.h
read-cache.c check_updates(): effective removal of cache entries marked CE_REMOVE 2009-02-18 17:11:21 -08:00
README README: tutorial.txt is now called gittutorial.txt 2009-01-06 22:12:07 -08:00
reflog-walk.c Rename path_list to string_list 2008-07-21 19:11:50 -07:00
reflog-walk.h git log -g: Complain, but do not fail, when no reflogs are there 2007-07-24 17:28:10 -07:00
refs.c Introduce for_each_recent_reflog_ent(). 2009-01-19 22:18:29 -08:00
refs.h Introduce for_each_recent_reflog_ent(). 2009-01-19 22:18:29 -08:00
RelNotes GIT 1.6.1.3 2009-02-07 00:51:47 -08:00
remote.c add is_dot_or_dotdot inline function 2009-01-11 13:21:57 -08:00
remote.h remote: add a new 'origin' variable to the struct 2008-11-11 14:19:29 -08:00
rerere.c Make some of fwrite/fclose/write/close failures visible 2008-12-04 18:05:41 -08:00
rerere.h Rename path_list to string_list 2008-07-21 19:11:50 -07:00
revision.c Merge branch 'js/maint-all-implies-HEAD' into maint 2009-02-05 17:54:12 -08:00
revision.h revision traversal: '--simplify-by-decoration' 2008-11-04 00:45:34 -08:00
run-command.c Merge branch 'jk/maint-cleanup-after-exec-failure' 2009-02-03 00:26:12 -08:00
run-command.h Merge branch 'jk/maint-cleanup-after-exec-failure' 2009-02-03 00:26:12 -08:00
send-pack.h Teach send-pack a mirror mode 2007-11-09 21:14:10 -08:00
server-info.c Use git_pathdup instead of xstrdup(git_path(...)) 2008-10-30 17:52:24 -07:00
setup.c Merge branch 'sg/maint-gitdir-in-subdir' into maint 2009-02-05 18:05:43 -08:00
sha1_file.c Merge branch 'lt/maint-wrap-zlib' into maint 2009-02-05 18:01:00 -08:00
sha1_name.c Merge branch 'tr/previous-branch' 2009-01-28 15:00:27 -08:00
sha1-lookup.c sha1-lookup: make selection of 'middle' less aggressive 2008-04-09 01:30:18 -07:00
sha1-lookup.h sha1-lookup: more memory efficient search in sorted list of SHA-1 2008-04-09 01:23:52 -07:00
shallow.c Merge branch 'mk/maint-parse-careful' 2008-02-18 20:56:01 -08:00
shell.c shell: do not play duplicated definition games to shrink the executable 2008-08-29 22:38:41 -07:00
shortlog.h Rename path_list to string_list 2008-07-21 19:11:50 -07:00
show-index.c Fix some warnings (on cygwin) to allow -Werror 2008-07-05 17:26:29 -07:00
sideband.c improve handling of sideband message display 2008-09-03 14:51:10 -07:00
sideband.h
sigchain.c refactor signal handling for cleanup functions 2009-01-21 22:46:53 -08:00
sigchain.h refactor signal handling for cleanup functions 2009-01-21 22:46:53 -08:00
strbuf.c strbuf: instate cleanup rule in case of non-memory errors 2009-01-06 22:13:43 -08:00
strbuf.h Add generic 'strbuf_readlink()' helper function 2008-12-17 13:36:30 -08:00
string-list.c Rename path_list to string_list 2008-07-21 19:11:50 -07:00
string-list.h Rename path_list to string_list 2008-07-21 19:11:50 -07:00
symlinks.c lstat_cache(): print a warning if doing ping-pong between cache types 2009-02-09 20:59:26 -08:00
tag.c Merge branch 'mk/maint-parse-careful' 2008-03-02 15:11:07 -08:00
tag.h
tar.h
test-chmtime.c Add --verbose|-v to test-chmtime 2008-10-31 00:19:52 -07:00
test-ctype.c Add is_regex_special() 2009-01-17 18:30:41 -08:00
test-date.c
test-delta.c Fix compilation of test-delta 2007-05-01 02:59:08 -07:00
test-dump-cache-tree.c add test-dump-cache-tree in Makefile 2009-02-03 22:11:44 -08:00
test-genrandom.c simple random data generator for tests 2007-04-11 19:23:32 -07:00
test-match-trees.c A new merge stragety 'subtree'. 2007-04-07 02:29:40 -07:00
test-parse-options.c test-parse-options: use appropriate cast in length_callback 2008-08-13 18:11:44 -07:00
test-path-utils.c test-path-utils: Fix off by one, found by valgrind 2009-01-27 15:16:41 -08:00
test-sha1.c fix openssl headers conflicting with custom SHA1 implementations 2008-10-02 18:06:56 -07:00
test-sha1.sh more tr portability test script fixes 2008-03-13 00:57:52 -07:00
test-sigchain.c t0005: use SIGTERM for sigchain test 2009-01-30 01:14:26 -08:00
thread-utils.c pack-objects: Add runtime detection of online CPU's 2008-02-23 12:00:32 -08:00
thread-utils.h pack-objects: Add runtime detection of online CPU's 2008-02-23 12:00:32 -08:00
trace.c Trace and quote with argv: get rid of unneeded count argument. 2007-12-03 22:11:53 -08:00
transport.c add is_dot_or_dotdot inline function 2009-01-11 13:21:57 -08:00
transport.h Implement git clone -v 2008-10-09 11:26:17 -07:00
tree-diff.c 'git foo' program identifies itself without dash in die() messages 2008-08-31 09:39:19 -07:00
tree-walk.c Fix tree-walking compare_entry() in the presense of --prefix 2008-03-09 00:43:47 -08:00
tree-walk.h Make 'traverse_trees()' traverse conflicting DF entries in parallel 2008-03-09 00:43:47 -08:00
tree.c add context pointer to read_tree_recursive() 2008-07-15 07:17:59 -07:00
tree.h add context pointer to read_tree_recursive() 2008-07-15 07:17:59 -07:00
unpack-file.c Replace deprecated dashed git commands in usage 2009-02-04 15:08:49 -08:00
unpack-trees.c check_updates(): effective removal of cache entries marked CE_REMOVE 2009-02-18 17:11:21 -08:00
unpack-trees.h checkout: do not lose staged removal 2008-09-09 22:55:22 -07:00
update-server-info.c Add calls to git_extract_argv0_path() in programs that call git_config_* 2009-01-26 00:26:05 -08:00
upload-pack.c Replace deprecated dashed git commands in usage 2009-02-04 15:08:49 -08:00
usage.c usage.c: remove unused functions 2008-09-29 07:30:16 -07:00
userdiff.c Change the spelling of "wordregex". 2009-01-21 23:52:16 -08:00
userdiff.h color-words: make regex configurable via attributes 2009-01-17 10:44:21 -08:00
utf8.c utf8: add utf8_strwidth() 2009-02-04 16:30:43 -08:00
utf8.h utf8: add utf8_strwidth() 2009-02-04 16:30:43 -08:00
var.c Add calls to git_extract_argv0_path() in programs that call git_config_* 2009-01-26 00:26:05 -08:00
walker.c make alloc_ref_from_str() the new alloc_ref() 2008-10-18 06:53:47 -07:00
walker.h Make walker.fetch_ref() take a struct ref. 2008-04-26 17:36:17 -07:00
wrapper.c Wrap inflate and other zlib routines for better error reporting 2009-01-11 02:13:06 -08:00
write_or_die.c Move read_in_full() and write_in_full() to wrapper.c 2008-07-20 17:17:09 -07:00
ws.c Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializer 2008-10-12 12:36:19 -07:00
wt-status.c reorder ALLOW_TEXTCONV option setting 2008-12-07 19:59:25 -08:00
wt-status.h Add argument 'no' commit/status option -u|--untracked-files 2008-06-09 15:48:19 -07:00
xdiff-interface.c xdiff-interface.c: remove 10 duplicated lines 2008-11-26 10:47:41 -08:00
xdiff-interface.h add xdi_diff_hunks() for callers that only need hunk lengths 2008-10-25 12:09:31 -07:00

README 

////////////////////////////////////////////////////////////////

	GIT - the stupid content tracker

////////////////////////////////////////////////////////////////

"git" can mean anything, depending on your mood.

 - random three-letter combination that is pronounceable, and not
   actually used by any common UNIX command.  The fact that it is a
   mispronunciation of "get" may or may not be relevant.
 - stupid. contemptible and despicable. simple. Take your pick from the
   dictionary of slang.
 - "global information tracker": you're in a good mood, and it actually
   works for you. Angels sing, and a light suddenly fills the room.
 - "goddamn idiotic truckload of sh*t": when it breaks

Git is a fast, scalable, distributed revision control system with an
unusually rich command set that provides both high-level operations
and full access to internals.

Git is an Open Source project covered by the GNU General Public License.
It was originally written by Linus Torvalds with help of a group of
hackers around the net. It is currently maintained by Junio C Hamano.

Please read the file INSTALL for installation instructions.
See Documentation/gittutorial.txt to get started, then see
Documentation/everyday.txt for a useful minimum set of commands,
and "man git-commandname" for documentation of each command.
CVS users may also want to read Documentation/cvs-migration.txt.

Many Git online resources are accessible from http://git.or.cz/
including full documentation and Git related tools.

The user discussion and development of Git take place on the Git
mailing list -- everyone is welcome to post bug reports, feature
requests, comments and patches to git@vger.kernel.org. To subscribe
to the list, send an email with just "subscribe git" in the body to
majordomo@vger.kernel.org. The mailing list archives are available at
http://marc.theaimsgroup.com/?l=git and other archival sites.

The messages titled "A note from the maintainer", "What's in
git.git (stable)" and "What's cooking in git.git (topics)" and
the discussion following them on the mailing list give a good
reference for project status, development direction and
remaining tasks.