Commit Graph

1976 Commits

Author SHA1 Message Date
Junio C Hamano
5fd72277d4 Merge branch 'jk/make-fix-dependencies' into maint
Build clean-up.

* jk/make-fix-dependencies:
  Makefile: silence perl/PM.stamp recipe
  Makefile: avoid timestamp updates to GIT-BUILD-OPTIONS
  Makefile: drop dependency between git-instaweb and gitweb
2015-06-25 11:02:16 -07:00
Junio C Hamano
c538004ccb Merge branch 'jk/skip-http-tests-under-no-curl' into maint
Test clean-up.

* jk/skip-http-tests-under-no-curl:
  tests: skip dav http-push tests under NO_EXPAT=NoThanks
  t/lib-httpd.sh: skip tests if NO_CURL is defined
2015-06-05 12:00:28 -07:00
Jeff King
7c37a5dc82 Makefile: silence perl/PM.stamp recipe
Every time we run "make", we update perl/PM.stamp, which
contains a list of all of the perl module files (if it's
updated, we need to rebuild perl/perl.mak, since the
Makefile will not otherwise know about the new files).

This means that every time "make" is run, we see:

      GEN perl/PM.stamp

in the output, even though it is not likely to have changed.
Let's make this recipe completely silent, as we do for other
auto-generated dependency files (e.g., GIT-CFLAGS).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-29 09:22:19 -07:00
Jeff King
a2d25ef07f Makefile: avoid timestamp updates to GIT-BUILD-OPTIONS
We force the GIT-BUILD-OPTIONS recipe to run every time
"make" is invoked. We must do this to catch new options
which may have come from the command-line or environment.

However, we actually update the file's timestamp each time
the recipe is run, whether anything changed or not. As a
result, any files which depend on it (for example, all of
the perl scripts, which need to know whether NO_PERL was
set) will be re-built every time.

Let's do our usual trick of writing to a tempfile, then
doing a "cmp || mv" to update the file only when something
changed.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-29 09:22:18 -07:00
Jeff King
e25c7cc146 Makefile: drop dependency between git-instaweb and gitweb
The rule for "git-instaweb" depends on "gitweb". This makes
no sense, because:

  1. git-instaweb has no build-time dependency on gitweb; it
     is a run-time dependency

  2. gitweb is a directory that we want to recursively make
     in. As a result, its recipe is marked .PHONY, which
     causes "make" to rebuild git-instaweb every time it is
     run.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-29 09:21:27 -07:00
Junio C Hamano
309a9e3373 tests: skip dav http-push tests under NO_EXPAT=NoThanks
When built with NO_EXPAT=NoThanks, we will not have a working http-push
over webdav.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-07 09:48:43 -07:00
Junio C Hamano
551fc7aec1 Merge branch 'km/bsd-sysctl'
We now detect number of CPUs on older BSD-derived systems.

* km/bsd-sysctl:
  thread-utils.c: detect CPU count on older BSD-like systems
  configure: support HAVE_BSD_SYSCTL option
2015-03-20 13:11:49 -07:00
Kyle J. McKay
9529080de2 configure: support HAVE_BSD_SYSCTL option
On BSD-compatible systems some information such as the number
of available CPUs may only be available via the sysctl function.

Add support for a HAVE_BSD_SYSCTL option complete with autoconf
support and include the sys/syctl.h header when the option is
enabled to make the sysctl function available.

Signed-off-by: Kyle J. McKay <mackyle@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-10 15:13:25 -07:00
Junio C Hamano
c0997feda8 Merge branch 'tc/curl-vernum-output-broken-in-7.11'
Certain older vintages of cURL give irregular output from
"curl-config --vernum", which confused our build system.

* tc/curl-vernum-output-broken-in-7.11:
  Makefile: handle broken curl version number in version check
2015-02-22 12:28:29 -08:00
Junio C Hamano
b19aab58f1 Merge branch 'km/gettext-n'
* km/gettext-n:
  gettext.h: add parentheses around N_ expansion if supported
2015-02-11 13:42:00 -08:00
Tom G. Christensen
3af67924e0 Makefile: handle broken curl version number in version check
curl 7.11.0 through 7.12.2 when built from their official release
archives will present a 5 digit version number instead of the documented
6 digits which breaks the version check in the Makefile.
Correct these broken version numbers on the fly when extracting them to
ensure the comparison works correctly.

[jc: shortened the new sed scripts a bit]

Signed-off-by: Tom G. Christensen <tgc@statsbiblioteket.dk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-03 18:30:24 -08:00
Kyle J. McKay
290c8e7a3f gettext.h: add parentheses around N_ expansion if supported
The gettext N_ macro is used to mark strings for translation
without actually translating them.  At runtime the string is
expected to be passed to the gettext API for translation.

If two N_ macro invocations appear next to each other with only
whitespace (or nothing at all) between them, the two separate
strings will be marked for translation, but the preprocessor
will then silently combine the strings into one and at runtime
the string passed to gettext will not match the strings that
were translated so no translation will actually occur.

Avoid this by adding parentheses around the expansion of the
N_ macro so that instead of ending up with two adjacent strings
that are then combined by the preprocessor, two adjacent strings
surrounded by parentheses result instead which causes a compile
error so the mistake can be quickly found and corrected.

However, since these string literals are typically assigned to
static variables and not all compilers support parenthesized
string literal assignments, allow this to be controlled by the
Makefile with the default only enabled when the compiler is
known to support the syntax.

For now only __GNUC__ enables this by default which covers both
gcc and clang which should result in early detection of any
adjacent N_ macros.

Although the necessary tests make the affected files a bit less
elegant, the benefit of avoiding propagation of a translation-
marking error to all the translation teams thus creating extra
work for them when the error is eventually detected and fixed
would seem to outweigh the minor inelegance the additional
configuration tests introduce.

Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Kyle J. McKay <mackyle@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-01-12 11:10:19 -08:00
Reuben Hawkins
88e011814b configure.ac: check for HMAC_CTX_cleanup
OpenSSL version 0.9.6b and before defined the function HMAC_cleanup.
Newer versions define HMAC_CTX_cleanup.  Check for HMAC_CTX_cleanup and
fall back to HMAC_cleanup when the newer function is missing.

Signed-off-by: Reuben Hawkins <reubenhwk@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-01-09 15:33:57 -08:00
Reuben Hawkins
a6c3c638ac configure.ac: check for clock_gettime and CLOCK_MONOTONIC
Set or clear Makefile variables HAVE_CLOCK_GETTIME and
HAVE_CLOCK_MONOTONIC based upon results of the checks (overriding
default values from config.mak.uname).

CLOCK_MONOTONIC isn't available on RHEL3, but there are still RHEL3
systems being used in production.

Signed-off-by: Reuben Hawkins <reubenhwk@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-01-09 15:33:39 -08:00
Junio C Hamano
c5cb52fd7c Merge branch 'br/imap-send-via-libcurl'
Newer libCurl knows how to talk IMAP; "git imap-send" has been
updated to use this instead of a hand-rolled OpenSSL calls.

* br/imap-send-via-libcurl:
  git-imap-send: use libcurl for implementation
2015-01-07 12:58:05 -08:00
Junio C Hamano
2f17ecbd8d Merge branch 'dm/compat-s-ifmt-for-zos'
Long overdue departure from the assumption that S_IFMT is shared by
everybody made in 2005.

* dm/compat-s-ifmt-for-zos:
  compat: convert modes to use portable file type values
2014-12-22 12:27:16 -08:00
Junio C Hamano
57815a4f56 Merge branch 'jk/rebuild-perl-scripts-with-no-perl-seting-change' into maint
The build procedure did not bother fixing perl and python scripts
when NO_PERL and NO_PYTHON build-time configuration changed.

* jk/rebuild-perl-scripts-with-no-perl-seting-change:
  Makefile: have python scripts depend on NO_PYTHON setting
  Makefile: simplify by using SCRIPT_{PERL,SH}_GEN macros
  Makefile: have perl scripts depend on NO_PERL setting
2014-12-22 12:18:35 -08:00
Junio C Hamano
974df59986 Merge branch 'jk/rebuild-perl-scripts-with-no-perl-seting-change'
The build procedure did not bother fixing perl and python scripts
when NO_PERL and NO_PYTHON build-time configuration changed.

* jk/rebuild-perl-scripts-with-no-perl-seting-change:
  Makefile: have python scripts depend on NO_PYTHON setting
  Makefile: simplify by using SCRIPT_{PERL,SH}_GEN macros
  Makefile: have perl scripts depend on NO_PERL setting
2014-12-12 14:31:37 -08:00
David Michael
d543d9c0f4 compat: convert modes to use portable file type values
This adds simple wrapper functions around calls to stat(), fstat(),
and lstat() that translate the operating system's native file type
bits to those used by most operating systems.  It also rewrites the
S_IF* macros to the common values, so all file type processing is
performed using the translated modes.  This makes projects portable
across operating systems that use different file type definitions.

Only the file type bits may be affected by these compatibility
functions; the file permission bits are assumed to be 07777 and are
passed through unchanged.

Signed-off-by: David Michael <fedora.dm0@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-12-04 11:58:36 -08:00
Jonathan Nieder
ca2051d6e3 Makefile: have python scripts depend on NO_PYTHON setting
Like the perl scripts, python scripts need a dependency to ensure they
are rebuilt when switching between the "dummy" versions that run
without Python and the real thing.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-11-18 11:15:50 -08:00
Jonathan Nieder
64c07db9ad Makefile: simplify by using SCRIPT_{PERL,SH}_GEN macros
SCRIPT_PERL_GEN is defined as $(patsubst %.perl,%,$(SCRIPT_PERL))
for use in targets like build-perl-script used by makefiles in
subdirectories that override SCRIPT_PERL (see v1.8.2-rc0~17^2,
"git-remote-mediawiki: use toplevel's Makefile", 2013-02-08).

The same expression is used in the rules that actually write the
generated perl scripts, and since these rules were introduced before
SCRIPT_PERL_GEN, they use the longhand instead of that macro.  Use the
macro to make reading easier.

Likewise for SCRIPT_SH_GEN.  The Python rules already got the same
simplification in v1.8.4-rc0~162^2~8 (2013-05-24).

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-11-18 11:15:04 -08:00
Jeff King
e204b001cf Makefile: have perl scripts depend on NO_PERL setting
If NO_PERL is not set, our perl scripts are built as
usual. If it is set, then we build "dummy" versions that
tell you git was built without perl support and exit
gracefully.

However, if you switch to NO_PERL in a directory with
existing build artifacts, we do not notice that the files
need rebuilt. We see only that they are newer than the
"unimplemented.sh" wrapper and assume they are done. So
doing:

  make
  make NO_PERL=Nope

would result in a git-add--interactive script that uses perl
(and running the test suite would make use of it).

Instead, we should trigger a rebuild of the perl scripts
anytime NO_PERL changes.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-11-18 10:15:14 -08:00
Bernhard Reiter
1e16b255b9 git-imap-send: use libcurl for implementation
Use libcurl's high-level API functions to implement git-imap-send
instead of the previous low-level OpenSSL-based functions.

Since version 7.30.0, libcurl's API has been able to communicate with
IMAP servers. Using those high-level functions instead of the current
ones would reduce imap-send.c by some 1200 lines of code. For now,
the old ones are wrapped in #ifdefs, and the new functions are enabled
by make if curl's version is >= 7.34.0, from which version on curl's
CURLOPT_LOGIN_OPTIONS (enabling IMAP authentication) parameter has been
available. The low-level functions will still be used for tunneling
into the server for now.

As I don't have access to that many IMAP servers, I haven't been able to
test the new code with a wide variety of parameter combinations. I did
test both secure and insecure (imaps:// and imap://) connections and
values of "PLAIN" and "LOGIN" for the authMethod.

In order to suppress a sparse warning about "using sizeof on a
function", we use the same solution used in commit 9371322a6
("sparse: suppress some "using sizeof on a function" warnings",
06-10-2013) which solved exactly this problem for the other commands
using libcurl.

Helped-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Bernhard Reiter <ockham@raz.or.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-11-10 09:17:27 -08:00
Junio C Hamano
ce71c1f339 Merge branch 'dm/port2zos'
z/OS port

* dm/port2zos:
  compat/bswap.h: detect endianness from XL C compiler macros
  Makefile: reorder linker flags in the git executable rule
  git-compat-util.h: support variadic macros with the XL C compiler
2014-10-29 10:08:07 -07:00
David Michael
48a031af3c Makefile: reorder linker flags in the git executable rule
The XL C compiler can fail due to mixing library path and object
file arguments, for example when linking git while building with
"gmake LDFLAGS=-L$prefix/lib".

Move the ALL_LDFLAGS variable expansion in the git executable rule
to be consistent with all the other linking rules, namely to have
LDFLAGS such as -L$where before the object files *.o being linked
together.

Signed-off-by: David Michael <fedora.dm0@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-27 11:49:18 -07:00
Junio C Hamano
9d04401ffe Merge branch 'cc/interpret-trailers'
A new filter to programatically edit the tail end of the commit log
messages.

* cc/interpret-trailers:
  Documentation: add documentation for 'git interpret-trailers'
  trailer: add tests for commands in config file
  trailer: execute command from 'trailer.<name>.command'
  trailer: add tests for "git interpret-trailers"
  trailer: add interpret-trailers command
  trailer: put all the processing together and print
  trailer: parse trailers from file or stdin
  trailer: process command line trailer arguments
  trailer: read and process config information
  trailer: process trailers from input message and arguments
  trailer: add data structures and basic functions
2014-10-20 12:25:32 -07:00
Junio C Hamano
40e2d8dbaf Merge branch 'rs/sha1-array-test'
* rs/sha1-array-test:
  sha1-lookup: handle duplicates in sha1_pos()
  sha1-array: add test-sha1-array and basic tests
2014-10-14 10:49:56 -07:00
Christian Couder
6634f05454 trailer: add interpret-trailers command
This patch adds the "git interpret-trailers" command.
This command uses the previously added process_trailers()
function in trailer.c.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-13 13:55:27 -07:00
Christian Couder
9385b5d706 trailer: add data structures and basic functions
We will use a doubly linked list to store all information
about trailers and their configuration.

This way we can easily remove or add trailers to or from
trailer lists while traversing the lists in either direction.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-13 13:55:26 -07:00
René Scharfe
38d905bf58 sha1-array: add test-sha1-array and basic tests
Helped-by: Jeff King <peff@peff.net>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-01 13:32:10 -07:00
Junio C Hamano
05fcf66b74 Merge branch 'ir/makefile-typofix'
* ir/makefile-typofix:
  Makefile: fix some typos in the preamble
2014-09-19 11:38:41 -07:00
Junio C Hamano
70f003e107 Merge branch 'tb/crlf-tests'
* tb/crlf-tests:
  MinGW: update tests to handle a native eol of crlf
  Makefile: propagate NATIVE_CRLF to C
  t0027: Tests for core.eol=native, eol=lf, eol=crlf
2014-09-19 11:38:37 -07:00
Ian Liu Rodrigues
3b2c5413c9 Makefile: fix some typos in the preamble
Signed-off-by: Ian Liu Rodrigues <ian.liu88@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-09-15 12:00:52 -07:00
Junio C Hamano
683b4d828c Merge branch 'jk/make-simplify-dependencies'
Admit that keeping LIB_H up-to-date, only for those that do not use
the automatically generated dependencies, is a losing battle, and
make it conservative by making everything depend on anything.

* jk/make-simplify-dependencies:
  Makefile: drop CHECK_HEADER_DEPENDENCIES code
  Makefile: use `find` to determine static header dependencies
  i18n: treat "make pot" as an explicitly-invoked target
2014-09-11 10:33:29 -07:00
Junio C Hamano
56f214e071 Merge branch 'ta/config-set'
Add in-core caching layer to let us avoid reading the same
configuration files number of times.

* ta/config-set:
  test-config: add tests for the config_set API
  add `config_set` API for caching config-like files
2014-09-02 13:24:18 -07:00
Pat Thoyts
5491e9e29e Makefile: propagate NATIVE_CRLF to C
Commit 95f31e9a (convert: The native line-ending is \r\n on MinGW,
2010-09-04) correctly points out that the NATIVE_CRLF setting is
incorrectly set on Mingw git. However, the Makefile variable is not
propagated to the C preprocessor and results in no change. This patch
pushes the definition to the C code and adds a test to validate that
when core.eol as native is crlf, we actually normalize text files to
this line ending convention when core.autocrlf is false.

Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
Signed-off-by: Stepan Kasal <kasal@ucw.cz>
Signed-off-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-09-02 12:09:40 -07:00
Jeff King
14821f8822 Makefile: drop CHECK_HEADER_DEPENDENCIES code
This code was useful when we kept a static list of header
files, and it was easy to forget to update it. Since the last
commit, we generate the list dynamically.

Technically this could still be used to find a dependency
that our dynamic check misses (e.g., a header file without a
".h" extension).  But that is reasonably unlikely to be
added, and even less likely to be noticed by this tool
(because it has to be run manually)., It is not worth
carrying around the cruft in the Makefile.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-08-26 12:56:31 -07:00
Junio C Hamano
212d781c96 Merge branch 'jk/fix-profile-feedback-build'
Fix profile-feedback build broken in 2.1 for tarball releases.

* jk/fix-profile-feedback-build:
  Makefile: make perf tests optional for profile build
2014-08-26 11:16:25 -07:00
Jeff King
d85b0dff72 Makefile: use find to determine static header dependencies
Most modern platforms will use automatically computed header
dependencies to figure out when a C file needs rebuilt due
to a header changing. With old compilers, however, we
fallback to a static list of header files. If any of them
changes, we recompile everything. This is overly
conservative, but the best we can do on older platforms.

It is unfortunately easy for our static header list to grow
stale, as none of the regular developers make use of it.
Instead of trying to keep it up to date, let's invoke "find"
to generate the list dynamically.

Since we do not use the value $(LIB_H) unless either
COMPUTE_HEADER_DEPENDENCIES is turned on or the user is
building "po/git.pot" (where it comes in via $(LOCALIZED_C),
make is smart enough to not even run this "find" in most
cases. However, we do need to stop using the "immediate"
variable assignment ":=" for $(LOCALIZED_C). That's OK,
because it was not otherwise useful here.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-08-25 14:03:07 -07:00
Jonathan Nieder
1f31963e92 i18n: treat "make pot" as an explicitly-invoked target
po/git.pot is normally used as-is and not regenerated by people
building git, so it is okay if an explicit "make po/git.pot" always
automatically regenerates it.  Depend on the magic FORCE target
instead of explicitly keeping track of dependencies.

This simplifies the makefile, in particular preparing for a moment
when $(LIB_H), which is part of $(LOCALIZED_C), can be computed on the
fly. It also fixes a slight breakage in which changes to perl and shell
scripts did not trigger a rebuild of po/git.pot.

We still need a dependency on GENERATED_H, to force those files to be
built when regenerating git.pot.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-08-25 12:23:01 -07:00
Jeff King
93b5393611 Makefile: make perf tests optional for profile build
The perf tests need a repository to operate on; if none is
defined, we fall back to the repository containing our build
directory.  That fails, though, for an exported tarball of
git.git, which has no repository.

Since 5d7fd6d we run the perf tests as part of "make
profile". Therefore "make profile" fails out of the box on
released tarballs of v2.1.0.

We can fix this by making the perf tests optional; if they
are skipped, we still run the regular test suite, which
should give a lot of profile data (and is what we used to do
prior to 5d7fd6d anyway).

Signed-off-by: Jeff King <peff@peff.net>
Acked-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-08-19 09:59:22 -07:00
Tanay Abhra
4c715ebb96 test-config: add tests for the config_set API
Expose the `config_set` C API as a set of simple commands in order to
facilitate testing. Add tests for the `config_set` API as well as for
`git_config_get_*()` family for the usual config files.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-29 14:33:36 -07:00
Junio C Hamano
9f2de9c121 Merge branch 'kb/perf-trace'
* kb/perf-trace:
  api-trace.txt: add trace API documentation
  progress: simplify performance measurement by using getnanotime()
  wt-status: simplify performance measurement by using getnanotime()
  git: add performance tracing for git's main() function to debug scripts
  trace: add trace_performance facility to debug performance issues
  trace: add high resolution timer function to debug performance issues
  trace: add 'file:line' to all trace output
  trace: move code around, in preparation to file:line output
  trace: add current timestamp to all trace output
  trace: disable additional trace output for unit tests
  trace: add infrastructure to augment trace output with additional info
  sha1_file: change GIT_TRACE_PACK_ACCESS logging to use trace API
  Documentation/git.txt: improve documentation of 'GIT_TRACE*' variables
  trace: improve trace performance
  trace: remove redundant printf format attribute
  trace: consistently name the format parameter
  trace: move trace declarations from cache.h to new trace.h
2014-07-22 10:59:19 -07:00
Junio C Hamano
3b3b61c5d5 Merge branch 'ak/profile-feedback-build'
* ak/profile-feedback-build:
  Fix profile feedback with -jN and add profile-fast
  Run the perf test suite for profile feedback too
  Don't define away __attribute__ on gcc
  Use BASIC_FLAGS for profile feedback
2014-07-21 11:17:47 -07:00
Junio C Hamano
788cef81d4 Merge branch 'nd/split-index'
An experiment to use two files (the base file and incremental
changes relative to it) to represent the index to reduce I/O cost
of rewriting a large index when only small part of the working tree
changes.

* nd/split-index: (32 commits)
  t1700: new tests for split-index mode
  t2104: make sure split index mode is off for the version test
  read-cache: force split index mode with GIT_TEST_SPLIT_INDEX
  read-tree: note about dropping split-index mode or index version
  read-tree: force split-index mode off on --index-output
  rev-parse: add --shared-index-path to get shared index path
  update-index --split-index: do not split if $GIT_DIR is read only
  update-index: new options to enable/disable split index mode
  split-index: strip pathname of on-disk replaced entries
  split-index: do not invalidate cache-tree at read time
  split-index: the reading part
  split-index: the writing part
  read-cache: mark updated entries for split index
  read-cache: save deleted entries in split index
  read-cache: mark new entries for split index
  read-cache: split-index mode
  read-cache: save index SHA-1 after reading
  entry.c: update cache_changed if refresh_cache is set in checkout_entry()
  cache-tree: mark istate->cache_changed on prime_cache_tree()
  cache-tree: mark istate->cache_changed on cache tree update
  ...
2014-07-16 11:25:40 -07:00
Karsten Blees
148d6771bf trace: add high resolution timer function to debug performance issues
Add a getnanotime() function that returns nanoseconds since 01/01/1970 as
unsigned 64-bit integer (i.e. overflows in july 2554). This is easier to
work with than e.g. struct timeval or struct timespec. Basing the timer on
the epoch allows using the results with other time-related APIs.

To simplify adaption to different platforms, split the implementation into
a common getnanotime() and a platform-specific highres_nanos() function.

The common getnanotime() function handles errors, falling back to
gettimeofday() if highres_nanos() isn't implemented or doesn't work.

getnanotime() is also responsible for normalizing to the epoch. The offset
to the system clock is calculated only once on initialization, i.e.
manually setting the system clock has no impact on the timer (except if
the fallback gettimeofday() is in use). Git processes are typically short
lived, so we don't need to handle clock drift.

The highres_nanos() function returns monotonically increasing nanoseconds
relative to some arbitrary point in time (e.g. system boot), or 0 on
failure. Providing platform-specific implementations should be relatively
easy, e.g. adapting to clock_gettime() as defined by the POSIX realtime
extensions is seven lines of code.

This version includes highres_nanos() implementations for:
 * Linux: using clock_gettime(CLOCK_MONOTONIC)
 * Windows: using QueryPerformanceCounter()

Todo:
 * enable clock_gettime() on more platforms
 * add Mac OSX version, e.g. using mach_absolute_time + mach_timebase_info

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-13 21:25:20 -07:00
Andi Kleen
066dd2632a Fix profile feedback with -jN and add profile-fast
Profile feedback always failed for me with -jN. The problem
was that there was no implicit ordering between the profile generate
stage and the profile use stage. So some objects in the later stage
would be linked with profile generate objects, and fail due
to the missing -lgcov.

This adds a new profile target that implicitely enforces the
correct ordering by using submakes. Plus a profile-install target
to also install. This is also nicer to type that PROFILE=...

Plus I always run the performance test suite now for the full
profile run.

In addition I also added a profile-fast / profile-fast-install
target the only runs the performance test suite instead of the
whole test suite. This significantly speeds up the profile build,
which was totally dominated by test suite run time. However
it may have less coverage of course.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-08 10:56:47 -07:00
Andi Kleen
5d7fd6d06f Run the perf test suite for profile feedback too
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-08 10:56:37 -07:00
Andi Kleen
0be314c207 Use BASIC_FLAGS for profile feedback
Use BASIC_CFLAGS instead of CFLAGS to set up the profile feedback
option in the Makefile.

This allows still overriding CFLAGS on the make command line
without disabling profile feedback.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-07 14:01:11 -07:00
Junio C Hamano
a9041df7ab Merge branch 'nd/index-pack-one-fd-per-thread' into maint
We used to disable threaded "git index-pack" on platforms without
thread-safe pread(); use a different workaround for such
platforms to allow threaded "git index-pack".

* nd/index-pack-one-fd-per-thread:
  index-pack: work around thread-unsafe pread()
2014-06-25 11:47:58 -07:00