Thread: Mingw task for Cirrus CI

Hi,

Andrew, CCIng you both because you might be interested in the CI bit, and
because you might know the answer.

On 2022-02-25 19:44:27 +0300, Melih Mutlu wrote:
> I've been working on adding Windows+MinGW environment into cirrus-ci tasks
> (discussion about ci is here [1]).
> It uses MSYS2 to set the environment. UCRT is chosen as C standard library,
> instead of MSVCRT.
> The task configures postgres with features that are available in MSYS2 (see
> available packages [2]) and tap tests are enabled.
> I already added the necessary docker image, you can find the related PR at
> [3] and a successful cirruc-ci run with these changes at [4].
> Attached patch adds a task runs on Windows with MinGW for cirrus-ci
>
> However, I cannot run configure with --with-python, --with-perl or
> --with-tcl.
> There are two issues I encountered while trying to enable.  e.g. for
> --with-python
>
> 1-  python_ldlibrary is set to "libpython3.9.dll.a". So the related line in
> configure cannot retrieve "ldlibrary"

This presumably is due to using mingw's python rather than python.org's
python. Seems like a reasonable thing to support for the mingw build.

Melih, you could try to build against the python.org python (i installed in
the CI container).


> 2-  src/pl/plpython/Makefile looks under "C:/Windows/system32/" for
> PYTHONDLL. gendef cannot open that file, give an error like " failed to
> open()" when creating a .def file.

On my win10 VM in which I installed python.org python I don't see a python dll
in c:/windows/system32 either. Looks like none of our windows mingw animals
build with python. So it might just be bitrot.


> In the end, make check-world still fails, even though I was able to run
> configure and make without any obvious error.
> I see bunch of errors in tests like:
> +ERROR:  language "plpython3u" does not exist
> +HINT:  Use CREATE EXTENSION to load the language into the database.

> Here is the logs from failed ci run:
> https://api.cirrus-ci.com/v1/artifact/task/4645682031099904/log/build/src/pl/plpython/regression.diffs

The URL to the rest of the CI run is https://cirrus-ci.com/task/4645682031099904


The relevant failure is earlier:

+ERROR:  could not load library "C:/cirrus/build/tmp_install/ucrt64/lib/postgresql/plpython3.dll": The specified module
couldnot be found.
 

Clearly plpython is being built, because we see some warnings:

[22:44:24.456] C:/msys64/ucrt64/include/python3.9/pyconfig.h:1474: warning: "SIZEOF_OFF_T" redefined
[22:44:24.456]  1474 | #define SIZEOF_OFF_T 8
[22:44:24.456]       |
[22:44:24.456] In file included from c:/cirrus/src/include/c.h:54,
[22:44:24.456]                  from c:/cirrus/src/include/postgres.h:46,
[22:44:24.456]                  from c:/cirrus/contrib/jsonb_plpython/jsonb_plpython.c:1:
[22:44:24.456] ../../src/include/pg_config.h:875: note: this is the location of the previous definition
[22:44:24.456]   875 | #define SIZEOF_OFF_T 4

Seems we're doing something wrong and end up with a 4 byte off_t, whereas
python ends up with an 8byte one. We probably need to fix that. But it's not
the cause of this problem.


You could take out -s from the make flags and see whether plpython3.dll is
being built and installed, and where to.


Greetings,

Andres Freund

On 2/25/22 19:27, Andres Freund wrote:
> Hi,
>
> Andrew, CCIng you both because you might be interested in the CI bit, and
> because you might know the answer.
>
>
>
>> 2-  src/pl/plpython/Makefile looks under "C:/Windows/system32/" for
>> PYTHONDLL. gendef cannot open that file, give an error like " failed to
>> open()" when creating a .def file.
> On my win10 VM in which I installed python.org python I don't see a python dll
> in c:/windows/system32 either. Looks like none of our windows mingw animals
> build with python. So it might just be bitrot.



There certainly was a time when python from python.org used to install
its DLL in the system32 directory, so I imagine that's why it's there.
I'm very glad to see that's no longer the case.


cheers


andrew

--
Andrew Dunstan
EDB: https://www.enterprisedb.com

On 3/3/22 05:16, Melih Mutlu wrote:
> Hi Andres, 
>  
>
>     This presumably is due to using mingw's python rather than
>     python.org <http://python.org>'s
>     python. Seems like a reasonable thing to support for the mingw build.
>
>     Melih, you could try to build against the python.org
>     <http://python.org> python (i installed in
>     the CI container).
>
>
> I tried to use the installed python from python.org
> <http://python.org> in the container. 
> The problem with this is that "LIBDIR" and "LDLIBRARY" configs of
> python for windows from python.org <http://python.org> are empty.
> Therefore python_libdir or other related variables in configure file
> are not set correctly.



Yeah, here's what it has:


# python -c "import sysconfig; import pprint; pp =
pprint.PrettyPrinter(); pp.pprint(sysconfig.get_config_vars())"
{'BINDIR': 'C:\\prog\\python310',
 'BINLIBDEST': 'C:\\prog\\python310\\Lib',
 'EXE': '.exe',
 'EXT_SUFFIX': '.cp310-win_amd64.pyd',
 'INCLUDEPY': 'C:\\prog\\python310\\Include',
 'LIBDEST': 'C:\\prog\\python310\\Lib',
 'SO': '.cp310-win_amd64.pyd',
 'TZPATH': '',
 'VERSION': '310',
 'abiflags': '',
 'base': 'C:\\prog\\python310',
 'exec_prefix': 'C:\\prog\\python310',
 'installed_base': 'C:\\prog\\python310',
 'installed_platbase': 'C:\\prog\\python310',
 'platbase': 'C:\\prog\\python310',
 'platlibdir': 'lib',
 'prefix': 'C:\\prog\\python310',
 'projectbase': 'C:\\prog\\python310',
 'py_version': '3.10.2',
 'py_version_nodot': '310',
 'py_version_nodot_plat': '310',
 'py_version_short': '3.10',
 'srcdir': 'C:\\prog\\python310',
 'userbase': 'C:\\Users\\Administrator\\AppData\\Roaming\\Python'}


The DLL lives in the BINDIR, so maybe I guess we should search there if
we can't get the other things.


cheers


andrew

--
Andrew Dunstan
EDB: https://www.enterprisedb.com

Hi,

On 2022-02-25 19:44:27 +0300, Melih Mutlu wrote:
> I've been working on adding Windows+MinGW environment into cirrus-ci tasks
> (discussion about ci is here [1]).

This doesn't apply anymore: http://cfbot.cputube.org/patch_37_3575.log

Could you rebase?

Greetings,

Andres Freund

Hi,

On 2022-03-22 19:00:42 +0300, Melih Mutlu wrote:
> Rebased it.
> I also removed the temp installation task and
> used NoDefaultCurrentDirectoryInExePath env variable instead.

Hm. But you're still using a separate build directory, from what I can see?
The NoDefaultCurrentDirectoryInExePath thing should only have an effect when
not using a separate build directory, no?

Does it work to not use the separate build dir? Without it we don't need the
the "preparing build tree" step, and that's quite slow on mingw:
https://cirrus-ci.com/task/4713509253545984?logs=configure#L392

[00:23:44.371] preparing build tree... done
[00:24:25.429] configure: creating ./config.status


Chatting about this patch with Thomas I started to wonder about other reasons
for the slow speed of configure. I briefly experimented locally, and it looks
like using 'dash' as the shell makes configure run a good bit quicker.


> ---
>  .cirrus.yml | 79 +++++++++++++++++++++++++++++++++++++++++++----------
>  1 file changed, 65 insertions(+), 14 deletions(-)
> 
> diff --git a/.cirrus.yml b/.cirrus.yml
> index e5335fede7..1ed40347cf 100644
> --- a/.cirrus.yml
> +++ b/.cirrus.yml
> @@ -23,7 +23,6 @@ env:
>    CHECKFLAGS: -Otarget
>    PROVE_FLAGS: --timer
>    PGCTLTIMEOUT: 120 # avoids spurious failures during parallel tests
> -  TEMP_CONFIG: ${CIRRUS_WORKING_DIR}/src/tools/ci/pg_ci_base.conf
>    PG_TEST_EXTRA: kerberos ldap ssl

This removes TEMP_CONFIG from all other tasks.  You added it back to the VS
windows task, but not the others? I assume that was accidental?


> +  env:
> +    CCACHE_DIR: C:/msys64/ccache
> +    BUILD_DIR: "%CIRRUS_WORKING_DIR%/build"

I think this should use TEMP_CONFIG too. Is the problem that you need to
change the path?


> +  ccache_cache:
> +    folder: ${CCACHE_DIR}
> +
> +  mingw_info_script:
> +    - C:\msys64\usr\bin\bash.exe -lc "where gcc"
> +    - C:\msys64\usr\bin\bash.exe -lc "gcc --version"
> +    - C:\msys64\usr\bin\bash.exe -lc "where perl"
> +    - C:\msys64\usr\bin\bash.exe -lc "perl --version"
> +
> +  configure_script:
> +    - C:\msys64\usr\bin\bash.exe -lc "mkdir %BUILD_DIR% &&
> +      cd %BUILD_DIR% &&
> +      %CIRRUS_WORKING_DIR%/configure

Could you try using dash to invoke configure here, and whether it makes configure faster?


> +        --host=x86_64-w64-mingw32
> +        --enable-cassert
> +        --enable-tap-tests
> +        --with-icu
> +        --with-libxml
> +        --with-libxslt
> +        --with-lz4
> +        --enable-debug
> +        CC='ccache gcc'
> +        CXX='ccache g++'"

I think this task should specify CFLAGS="-Og", CXXFLAGS="-Og" similar to other
tasks. We end up with -O2 otherwise, which makes the build measurably slower.



> +  tests_script:
> +  - set "NoDefaultCurrentDirectoryInExePath=0"

A comment about why NoDefaultCurrentDirectoryInExePath=0 is used would be
good.


Greetings,

Andres Freund

Hi,

On 2022-03-30 17:26:18 -0700, Andres Freund wrote:
> Hi,
>
> On 2022-03-22 19:00:42 +0300, Melih Mutlu wrote:
> > Rebased it.
> > I also removed the temp installation task and
> > used NoDefaultCurrentDirectoryInExePath env variable instead.
>
> Hm. But you're still using a separate build directory, from what I can see?
> The NoDefaultCurrentDirectoryInExePath thing should only have an effect when
> not using a separate build directory, no?

Melih chatted with me about making this work. Turns out it doesn't readily -
pg_ctl still fails.


The reason that NoDefaultCurrentDirectoryInExePath doesn't suffice to get a
working in-tree build, is that we break it ourselves:

int
find_my_exec(const char *argv0, char *retpath)
...
#ifdef WIN32
    /* Win32 checks the current directory first for names without slashes */
    join_path_components(retpath, cwd, argv0);
    if (validate_exec(retpath) == 0)
        return resolve_symlinks(retpath);
#endif

So even if windows doesn't actually use the current path, and the current
pg_ctl process isn't the one from the current directory, we *still* return
that.

Gah.


Maybe we should just use GetModuleFileName()?


But even after that the tests don't work. Commands started via IPC::Run do,
but when using system() they don't. Looks like perl parses the path the itself
:(.

- Andres

On 4/4/22 16:41, Andres Freund wrote:
> Hi,
>
> On 2022-03-30 17:26:18 -0700, Andres Freund wrote:
>> Hi,
>>
>> On 2022-03-22 19:00:42 +0300, Melih Mutlu wrote:
>>> Rebased it.
>>> I also removed the temp installation task and
>>> used NoDefaultCurrentDirectoryInExePath env variable instead.
>> Hm. But you're still using a separate build directory, from what I can see?
>> The NoDefaultCurrentDirectoryInExePath thing should only have an effect when
>> not using a separate build directory, no?
> Melih chatted with me about making this work. Turns out it doesn't readily -
> pg_ctl still fails.
>
>
> The reason that NoDefaultCurrentDirectoryInExePath doesn't suffice to get a
> working in-tree build, is that we break it ourselves:
>
> int
> find_my_exec(const char *argv0, char *retpath)
> ...
> #ifdef WIN32
>     /* Win32 checks the current directory first for names without slashes */
>     join_path_components(retpath, cwd, argv0);
>     if (validate_exec(retpath) == 0)
>         return resolve_symlinks(retpath);
> #endif
>
> So even if windows doesn't actually use the current path, and the current
> pg_ctl process isn't the one from the current directory, we *still* return
> that.
>
> Gah.




I notice a few things about the latest file in this thread.

You should set MSYSTEM=UCRT64 in the environment section. Given that,
there should be no need to specify a --host= setting for configure.

If it's not done already, the shebang line in
/ucrt64/bin/core_perl/prove needs to be modified to use /ucrt64/bin/perl.


cheers


andrew


--
Andrew Dunstan
EDB: https://www.enterprisedb.com

On 3/30/22 20:26, Andres Freund wrote:
> Could you try using dash to invoke configure here, and whether it makes configure faster?
>
>


I got weird failures re libxml/parser.h when I tried with dash. See
<https://cirrus-ci.com/task/5963254039052288> (It would be nice if we
could see config.log on failure.)


cheers


andrew


--
Andrew Dunstan
EDB: https://www.enterprisedb.com

Hi,

On 2022-04-06 11:03:37 -0400, Andrew Dunstan wrote:
> On 3/30/22 20:26, Andres Freund wrote:
> > Could you try using dash to invoke configure here, and whether it makes configure faster?
> I got weird failures re libxml/parser.h when I tried with dash.

Hm. Hadn't enabled that when I tried...


> See <https://cirrus-ci.com/task/5963254039052288> (It would be nice if we
> could see config.log on failure.)

All *.log files are preserved on failure. There's a file directory brower at
the top to navigate around:
https://api.cirrus-ci.com/v1/artifact/task/5963254039052288/log/build/config.log

Greetings,

Andres Freund

Hi,

On 2022-04-06 11:03:37 -0400, Andrew Dunstan wrote:
> On 3/30/22 20:26, Andres Freund wrote:
> > Could you try using dash to invoke configure here, and whether it makes configure faster?
> I got weird failures re libxml/parser.h when I tried with dash. See
> <https://cirrus-ci.com/task/5963254039052288> (It would be nice if we
> could see config.log on failure.)

Since dash won't help us to get the build time down sufficiently, and the
tests don't pass without a separate build tree, I looked at what makes
config/prep_buildtree so slow.

It's largely just bad code. The slowest part are spawning one expr and mkdir
-p for each directory. One 'cmp' for each makefile doesn't help either.

The expr can be replaced with
  subdir=${item#$sourcetree}
that's afaics posix syntax ([1]), not bash.

Spawning one mkdir for each directory can be replaced by a single mkdir
invocation with all the directories. On my linux workstation that gets the
time for the first loop down from 1005ms to 38ms, really.

That has the danger of the commandline getting too long. But since we rely on
the final link of the backend to be done in a single command, I don't think
it's making things worse? We could try to use xargs otherwise, iirc that's in
posix as well.

Using parameter substitution in the second loop takes it down from 775ms to
533ms. Not calling cmp when the file doesn't exist cuts it down to 337ms.

I don't know of a way to batch the call to ln. The time with ln replaced with
: is 151ms, fwiw.

On windows that makes prep_buildtree go from 42.4s to 5.8s for me.

Greetings,

Andres Freund

[1] https://pubs.opengroup.org/onlinepubs/009604499/utilities/xcu_chap02.html

On 4/6/22 12:34, Andres Freund wrote:
> Hi,
>
> On 2022-04-06 11:03:37 -0400, Andrew Dunstan wrote:
>> On 3/30/22 20:26, Andres Freund wrote:
>>> Could you try using dash to invoke configure here, and whether it makes configure faster?
>> I got weird failures re libxml/parser.h when I tried with dash.
> Hm. Hadn't enabled that when I tried...
>
>
>> See <https://cirrus-ci.com/task/5963254039052288> (It would be nice if we
>> could see config.log on failure.)
> All *.log files are preserved on failure. There's a file directory brower at
> the top to navigate around:
> https://api.cirrus-ci.com/v1/artifact/task/5963254039052288/log/build/config.log



Thanks.


I got it working with this added to the config settings:


--with-includes='/ucrt64/include/libxml2 /c/cirrus/src/include/port/win32'


I conclude tentatively that while bash translates widows paths to msys
paths, dash does not.


see https://cirrus-ci.com/task/5968968560148480?logs=configure#L1


cheers


andrew


--
Andrew Dunstan
EDB: https://www.enterprisedb.com

On 4/7/22 13:10, Andres Freund wrote:
> Hi,
>
> On 2022-04-06 11:03:37 -0400, Andrew Dunstan wrote:
>> On 3/30/22 20:26, Andres Freund wrote:
>>> Could you try using dash to invoke configure here, and whether it makes configure faster?
>> I got weird failures re libxml/parser.h when I tried with dash. See
>> <https://cirrus-ci.com/task/5963254039052288> (It would be nice if we
>> could see config.log on failure.)
> Since dash won't help us to get the build time down sufficiently, and the
> tests don't pass without a separate build tree, I looked at what makes
> config/prep_buildtree so slow.
>
> It's largely just bad code. The slowest part are spawning one expr and mkdir
> -p for each directory. One 'cmp' for each makefile doesn't help either.
>
> The expr can be replaced with
>   subdir=${item#$sourcetree}
> that's afaics posix syntax ([1]), not bash.
>
> Spawning one mkdir for each directory can be replaced by a single mkdir
> invocation with all the directories. On my linux workstation that gets the
> time for the first loop down from 1005ms to 38ms, really.
>
> That has the danger of the commandline getting too long. But since we rely on
> the final link of the backend to be done in a single command, I don't think
> it's making things worse? We could try to use xargs otherwise, iirc that's in
> posix as well.
>
> Using parameter substitution in the second loop takes it down from 775ms to
> 533ms. Not calling cmp when the file doesn't exist cuts it down to 337ms.
>
> I don't know of a way to batch the call to ln. The time with ln replaced with
> : is 151ms, fwiw.


AFAIK Msy2s 'ln -s' by default copies a non-directory rather than
actually symlinking it. If we want real symlinks, then we need
MSYS=|winsymlinks:nativestrict set. The is will fail unless the calling
user is an Administrator or has the SeCreateSymbolicLink privilege. See
|

|<https://postgr.es/m/|e05b213c-1257-84d4-f079-5c4d8c79e3ad@dunslane.net>
for more details.


> On windows that makes prep_buildtree go from 42.4s to 5.8s for me.


That's pretty good.


I think we can get rid of the CVS pruning, it's only 15 years or so
since we've had that in the tree.


+        if test ! -d "$buildtree/$subdir"; then
+            echo "$buildtree/$subdir"
+        fi


I would probably just write that as


test -d "$buildtree/$subdir' || echo "$buildtree/$subdir"


although it's really just a matter of taste.


cheers


andrew


--
Andrew Dunstan
EDB: https://www.enterprisedb.com

On 4/7/22 16:48, Andrew Dunstan wrote:
> On 4/7/22 13:10, Andres Freund wrote:
>> Hi,
>>
>> On 2022-04-06 11:03:37 -0400, Andrew Dunstan wrote:
>>> On 3/30/22 20:26, Andres Freund wrote:
>>>> Could you try using dash to invoke configure here, and whether it makes configure faster?
>>> I got weird failures re libxml/parser.h when I tried with dash. See
>>> <https://cirrus-ci.com/task/5963254039052288> (It would be nice if we
>>> could see config.log on failure.)
>> Since dash won't help us to get the build time down sufficiently, and the
>> tests don't pass without a separate build tree, I looked at what makes
>> config/prep_buildtree so slow.
>>
>> It's largely just bad code. The slowest part are spawning one expr and mkdir
>> -p for each directory. One 'cmp' for each makefile doesn't help either.
>>
>> The expr can be replaced with
>>   subdir=${item#$sourcetree}
>> that's afaics posix syntax ([1]), not bash.
>>
>> Spawning one mkdir for each directory can be replaced by a single mkdir
>> invocation with all the directories. On my linux workstation that gets the
>> time for the first loop down from 1005ms to 38ms, really.
>>
>> That has the danger of the commandline getting too long. But since we rely on
>> the final link of the backend to be done in a single command, I don't think
>> it's making things worse? We could try to use xargs otherwise, iirc that's in
>> posix as well.
>>
>> Using parameter substitution in the second loop takes it down from 775ms to
>> 533ms. Not calling cmp when the file doesn't exist cuts it down to 337ms.
>>
>> I don't know of a way to batch the call to ln. The time with ln replaced with
>> : is 151ms, fwiw.
>
> AFAIK Msy2s 'ln -s' by default copies a non-directory rather than
> actually symlinking it. If we want real symlinks, then we need
> MSYS=|winsymlinks:nativestrict set. The is will fail unless the calling
> user is an Administrator or has the SeCreateSymbolicLink privilege. See
> |


Sometimes I hate Thunderbird. Of course the | is spurious above, we
would need

MSYS=winsymlinks:nativestrict

set.


cheers

andrew


--
Andrew Dunstan
EDB: https://www.enterprisedb.com

On 2022-Apr-07, Andres Freund wrote:

> Since dash won't help us to get the build time down sufficiently, and the
> tests don't pass without a separate build tree, I looked at what makes
> config/prep_buildtree so slow.

Maybe we can replace prep_buildtree with a Perl script.  Surely that
should be faster.

-- 
Álvaro Herrera        Breisgau, Deutschland  —  https://www.EnterpriseDB.com/
"Sallah, I said NO camels! That's FIVE camels; can't you count?"
(Indiana Jones)

Hi,

On 2022-04-08 17:04:34 +0200, Alvaro Herrera wrote:
> > Since dash won't help us to get the build time down sufficiently, and the
> > tests don't pass without a separate build tree, I looked at what makes
> > config/prep_buildtree so slow.
>
> Maybe we can replace prep_buildtree with a Perl script.  Surely that
> should be faster.

Currently building doesn't depend on perl :(

I think the improvements that I suggested are big enough that they're worth
doing on their own, particularly for windows, but also other OSs.


I just realized that the second find is pretty expensive compared to the
first.

time find "$sourcetree" -type d \( \( -name CVS -prune \) -o \( -name .git -prune \) -o -print \) | grep -v
"$sourcetree/doc/src/sgml/\+"> /dev/null
 
real    0m0.019s
user    0m0.008s
sys    0m0.017s

second:
time find "$sourcetree" -name Makefile -print -o -name GNUmakefile -print | grep -v "$sourcetree/doc/src/sgml/images/"
>/dev/null
 

real    0m0.118s
user    0m0.071s
sys    0m0.053s

It think we could just obsolete the second find, by checking for the existence
of Makefile / GNUmakefile in the first loop...


The invocation of ln -s is quite measurable - looks like it's mostly the
process startup overhead (on linux, at least). Doing a ln --version > /dev/null
each iteration takes about the same time as actually creating the symlinks.

Greetings,

Andres Freund

On Thu, Apr 07, 2022 at 10:10:21AM -0700, Andres Freund wrote:
> Hi,
> 
> On 2022-04-06 11:03:37 -0400, Andrew Dunstan wrote:
> > On 3/30/22 20:26, Andres Freund wrote:
> > > Could you try using dash to invoke configure here, and whether it makes configure faster?
> > I got weird failures re libxml/parser.h when I tried with dash. See
> > <https://cirrus-ci.com/task/5963254039052288> (It would be nice if we
> > could see config.log on failure.)
> 
> Since dash won't help us to get the build time down sufficiently, and the
> tests don't pass without a separate build tree, I looked at what makes
> config/prep_buildtree so slow.
> 
> It's largely just bad code. The slowest part are spawning one expr and mkdir
> -p for each directory. One 'cmp' for each makefile doesn't help either.
> 
> The expr can be replaced with
>   subdir=${item#$sourcetree}
> that's afaics posix syntax ([1]), not bash.
> 
> Spawning one mkdir for each directory can be replaced by a single mkdir
> invocation with all the directories. On my linux workstation that gets the
> time for the first loop down from 1005ms to 38ms, really.

Even better?

(cd "$sourcetree" && find . -print |grep -E '/Makefile$|/GNUmakefile$' |grep -v "$sourcetree/doc/src/sgml/images/"
|xargstar c) |
 
        (cd "$buildtree" && tar x)

Hi,

On 2022-04-08 19:27:58 -0500, Justin Pryzby wrote:
> On Thu, Apr 07, 2022 at 10:10:21AM -0700, Andres Freund wrote:
> > On 2022-04-06 11:03:37 -0400, Andrew Dunstan wrote:
> > > On 3/30/22 20:26, Andres Freund wrote:
> > > > Could you try using dash to invoke configure here, and whether it makes configure faster?
> > > I got weird failures re libxml/parser.h when I tried with dash. See
> > > <https://cirrus-ci.com/task/5963254039052288> (It would be nice if we
> > > could see config.log on failure.)
> > 
> > Since dash won't help us to get the build time down sufficiently, and the
> > tests don't pass without a separate build tree, I looked at what makes
> > config/prep_buildtree so slow.
> > 
> > It's largely just bad code. The slowest part are spawning one expr and mkdir
> > -p for each directory. One 'cmp' for each makefile doesn't help either.
> > 
> > The expr can be replaced with
> >   subdir=${item#$sourcetree}
> > that's afaics posix syntax ([1]), not bash.
> > 
> > Spawning one mkdir for each directory can be replaced by a single mkdir
> > invocation with all the directories. On my linux workstation that gets the
> > time for the first loop down from 1005ms to 38ms, really.
> 
> Even better?
> 
> (cd "$sourcetree" && find . -print |grep -E '/Makefile$|/GNUmakefile$' |grep -v "$sourcetree/doc/src/sgml/images/"
|xargstar c) |
 
>         (cd "$buildtree" && tar x)

Don't think we depend on tar for building, at the moment. But yes, it'd be
faster... Tar is certainly a smaller dependency than perl, not sure if there's
any relevant platform without it?

Greetings,

Andres Freund

On 2022-Apr-08, Andres Freund wrote:

> I just realized that the second find is pretty expensive compared to the
> first.
> 
> time find "$sourcetree" -type d \( \( -name CVS -prune \) -o \( -name .git -prune \) -o -print \) | grep -v
"$sourcetree/doc/src/sgml/\+"> /dev/null
 
> real    0m0.019s
> user    0m0.008s
> sys    0m0.017s
> 
> second:
> time find "$sourcetree" -name Makefile -print -o -name GNUmakefile -print | grep -v
"$sourcetree/doc/src/sgml/images/"> /dev/null
 
> 
> real    0m0.118s
> user    0m0.071s
> sys    0m0.053s

Hmm, ISTM that time can be reduced a bit with -prune,

time find "$sourcetree"  \( -name .git -prune \) -o -name Makefile -print -o -name GNUmakefile -print | grep -v
"$sourcetree/doc/src/sgml/images/"> /dev/null
 

I thought it might work to do away with the grep and use find's -path
instead to prune that subdir, but "time" shows almost no difference for
me:

time find "$sourcetree"  \( -name .git -prune \) -o \( -path '*doc/src/sgml/images' -prune \) -o -name Makefile -print
-o-name GNUmakefile -print > /dev/null
 

Maybe find's -path is equally expensive.  Still, that seems a good
change anyway.  (The times are lower in my system than those you show.)

> It think we could just obsolete the second find, by checking for the existence
> of Makefile / GNUmakefile in the first loop...

Hmm, if that's going to require one more shell command per dir, it
sounds more expensive. It's worth trying, I guess.

> The invocation of ln -s is quite measurable - looks like it's mostly the
> process startup overhead (on linux, at least). Doing a ln --version > /dev/null
> each iteration takes about the same time as actually creating the symlinks.

Is this running with some locale settings enabled?  Maybe we can save
some time by making sure we're under LC_ALL=C or something like that, to
avoid searching for translation files.

-- 
Álvaro Herrera         PostgreSQL Developer  —  https://www.EnterpriseDB.com/
"Las navajas y los monos deben estar siempre distantes"   (Germán Poo)

On 4/8/22 21:02, Andres Freund wrote:
> Hi,
>
> On 2022-04-08 19:27:58 -0500, Justin Pryzby wrote:
>> On Thu, Apr 07, 2022 at 10:10:21AM -0700, Andres Freund wrote:
>>> On 2022-04-06 11:03:37 -0400, Andrew Dunstan wrote:
>>>> On 3/30/22 20:26, Andres Freund wrote:
>>>>> Could you try using dash to invoke configure here, and whether it makes configure faster?
>>>> I got weird failures re libxml/parser.h when I tried with dash. See
>>>> <https://cirrus-ci.com/task/5963254039052288> (It would be nice if we
>>>> could see config.log on failure.)
>>> Since dash won't help us to get the build time down sufficiently, and the
>>> tests don't pass without a separate build tree, I looked at what makes
>>> config/prep_buildtree so slow.
>>>
>>> It's largely just bad code. The slowest part are spawning one expr and mkdir
>>> -p for each directory. One 'cmp' for each makefile doesn't help either.
>>>
>>> The expr can be replaced with
>>>   subdir=${item#$sourcetree}
>>> that's afaics posix syntax ([1]), not bash.
>>>
>>> Spawning one mkdir for each directory can be replaced by a single mkdir
>>> invocation with all the directories. On my linux workstation that gets the
>>> time for the first loop down from 1005ms to 38ms, really.
>> Even better?
>>
>> (cd "$sourcetree" && find . -print |grep -E '/Makefile$|/GNUmakefile$' |grep -v "$sourcetree/doc/src/sgml/images/"
|xargstar c) |
 
>>         (cd "$buildtree" && tar x)
> Don't think we depend on tar for building, at the moment. But yes, it'd be
> faster... Tar is certainly a smaller dependency than perl, not sure if there's
> any relevant platform without it?
>
>


Couple of things here.


1. The second grep should lose "$sourcetree" I think.

2. Isn't this going to be a change in behaviour in that it will copy
rather than symlinking the Makefiles? That is in fact the default
behaviour of msys2's 'ln -s', as I pointed out upthread, but I don't
think it's what we really want, especially in the general case. If you
modify the Makefile and you're using a vpath you want to see the change
reflected in your vpath.


cheers


andrew

--
Andrew Dunstan
EDB: https://www.enterprisedb.com

I think the "only_if" should allow separately running one but not both of the
windows instances, like:

+  only_if: $CIRRUS_CHANGE_MESSAGE !=~ '.*\nci-os-only:.*' || $CIRRUS_CHANGE_MESSAGE =~ '.*\nci-os-only:[^\n]*mingw64'

I'm not sure, but maybe this task should only run "by request", and omit the
first condition:

+  only_if: $CIRRUS_CHANGE_MESSAGE =~ '.*\nci-os-only:[^\n]*mingw64'

I think it should include something like

+  setup_additional_packages_script: |
+    REM C:\msys64\usr\bin\pacman.exe -S --noconfirm ...

Let's see what others think about those.

Do you know if this handles logging of crash dumps ?

With tweaks to prep_buildtree, and with ./configure --cache-file, that step
goes down to ~36sec (unless configure needs to be re-run).

I also looked into using busybox to avoid running separate processes for each
"ln", but I think 36sec is good enough.

At one point, I tried setting "CIRRUS_SHELL: bash" to avoid writing "bash -c"
over and over, but never got it working.

-- 
Justin

I noticed that this says:

[01:01:45.657] sqlda.pgc: In function 'dump_sqlda':
[01:01:45.657] sqlda.pgc:45:33: warning: format '%d' expects argument
of type 'int', but argument 3 has type 'long long int' [-Wformat=]
[01:01:45.657] 45 | "name sqlda descriptor: '%s' value %I64d\n",
[01:01:45.657] | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[01:01:45.657] ......
[01:01:45.657] 49 | sqlda->sqlvar[i].sqlname.data, *(long long int
*)sqlda->sqlvar[i].sqldata);
[01:01:45.657] | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[01:01:45.657] | |
[01:01:45.657] | long long int

... but fairywren doesn't.  Why would they disagree on recognising %I64d?

The other warning I'm seeing is present on both, so it's not really
relevant to this thread, just mentioning it...  seems kinda like a
worlds-colliding-problem without an elegant fix (POSIX says you have
to declare it yourself exactly like that, but Windows says linkage
ain't going to work the way you want unless you sprinkle the right
linkage dust on it...), so maybe we just want to put #if
!defined(something something mings) around it and to MinGW's header's
declaration...

[00:48:08.925] c:/cirrus/src/backend/postmaster/postmaster.c: In
function 'PostmasterMain':
[00:48:08.925] c:/cirrus/src/backend/postmaster/postmaster.c:973:31:
warning: '__p__environ' redeclared without dllimport attribute:
previous dllimport ignored [-Wattributes]
[00:48:08.925] 973 | extern char **environ;
[00:48:08.925] | ^~~~~~~

On Thu, Aug 4, 2022 at 2:04 PM Thomas Munro <thomas.munro@gmail.com> wrote:
> I noticed that this says:
>
> [01:01:45.657] sqlda.pgc: In function 'dump_sqlda':
> [01:01:45.657] sqlda.pgc:45:33: warning: format '%d' expects argument
> of type 'int', but argument 3 has type 'long long int' [-Wformat=]
> [01:01:45.657] 45 | "name sqlda descriptor: '%s' value %I64d\n",
> [01:01:45.657] | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> [01:01:45.657] ......
> [01:01:45.657] 49 | sqlda->sqlvar[i].sqlname.data, *(long long int
> *)sqlda->sqlvar[i].sqldata);
> [01:01:45.657] | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> [01:01:45.657] | |
> [01:01:45.657] | long long int
>
> ... but fairywren doesn't.  Why would they disagree on recognising %I64d?

Oops, I was looking in the wrong place.  fairywren does also shows the warning:

https://buildfarm.postgresql.org/cgi-bin/show_stage_log.pl?nm=fairywren&dt=2022-08-02%2022%3A05%3A30&stg=ecpg-check

Something to fix, but not directly relevant to this patch.  Sorry for the noise.

Inline notes about changes since the last version.

On Thu, Jul 28, 2022 at 05:44:28PM -0500, Justin Pryzby wrote:
> I think the "only_if" should allow separately running one but not both of the
> windows instances, like:
> 
> +  only_if: $CIRRUS_CHANGE_MESSAGE !=~ '.*\nci-os-only:.*' || $CIRRUS_CHANGE_MESSAGE =~
'.*\nci-os-only:[^\n]*mingw64'
> 
> I'm not sure, but maybe this task should only run "by request", and omit the
> first condition:
> 
> +  only_if: $CIRRUS_CHANGE_MESSAGE =~ '.*\nci-os-only:[^\n]*mingw64'

The patch shouldn't say this during development, or else cfbot doesn't run it..
Oops.

> I think it should include something like
> 
> +  setup_additional_packages_script: |
> +    REM C:\msys64\usr\bin\pacman.exe -S --noconfirm ...
> 
> Let's see what others think about those.
> 
> Do you know if this handles logging of crash dumps ?

It does now, although I hardcoded "postgres.exe" ...

> +  setup_additional_packages_script: |
> +    REM C:\msys64\usr\bin\pacman.exe -S --noconfirm busybox

This should include choco, too.

> -        CXXFLAGS='-Og -ggdb'"
> +        CXXFLAGS='-Og -ggdb' && break;
> +        rm -v ${CCACHE_DIR}/configure.cache;
> +        done

I noticed that this doesn't seem to do the right thing with the exit status -
configure can fail without cirrusci noticing, and then the build fails at the
next step.

>  for item in `find "$sourcetree" -name Makefile -print -o -name GNUmakefile -print | grep -v
"$sourcetree/doc/src/sgml/images/"`;do
 
> -    filename=`expr "$item" : "$sourcetree\(.*\)"`
> -    if test ! -f "${item}.in"; then
> -        if cmp "$item" "$buildtree/$filename" >/dev/null 2>&1; then : ; else
> -            ln -fs "$item" "$buildtree/$filename" || exit 1
> -        fi
> -    fi
> +    filename=${item#$sourcetree}
> +    [ -e "$buildtree/$filename" ] && continue

I fixed this to check for ".in" files as intended.

It'd be a lot better if the image didn't take so long to start. :(

-- 
Justin

On Sat, Sep 03, 2022 at 12:52:54AM +0300, Melih Mutlu wrote:
> Justin Pryzby <pryzby@telsasoft.com>, 19 Ağu 2022 Cum, 05:34 tarihinde şunu yazdı:
> 
> > Inline notes about changes since the last version.
> >
> > On Thu, Jul 28, 2022 at 05:44:28PM -0500, Justin Pryzby wrote:
> > > I think the "only_if" should allow separately running one but not both
> > of the
> > > windows instances, like:
> > >
> > > +  only_if: $CIRRUS_CHANGE_MESSAGE !=~ '.*\nci-os-only:.*' || $CIRRUS_CHANGE_MESSAGE =~
'.*\nci-os-only:[^\n]*mingw64'
> > >
> > > I'm not sure, but maybe this task should only run "by request", and omit the
> > > first condition:
> > >
> > > +  only_if: $CIRRUS_CHANGE_MESSAGE =~ '.*\nci-os-only:[^\n]*mingw64'
> >
> > The patch shouldn't say this during development, or else cfbot doesn't run it..
> > Oops.
>
> Actually, making MinGW task optional for now might make sense. Due to
> windows resource limits on Cirrus CI and slow builds on Windows, adding
> this task as non-optional may not be an efficient decision
> I think that continuing with this patch by changing MinGW to optional for
> now, instead of waiting for more resource on Cirrus or faster builds on
> Windows, could be better. I don't see any harm.

I agree that maybe it should be optional if merged to postgres.

But cfbot should run the Mingw task for this patch's own commitfest
entry.  But right now (because cfbot doesn't include the original commit
message/s), it doesn't get run :(

> +  only_if: $CIRRUS_CHANGE_MESSAGE =~ '.*\nci-os-include:[^\n]*mingw.* ||
>             $CIRRUS_CHANGE_MESSAGE =~ '.*\nci-os-only:[^\n]*mingw.*'
> 
> Added this line to allow run only mingw task or run all tasks including
> mingw.
> 
> What do you all think about this change? Does it make sense?

You're allowing to write "ci-os-include: mingw" to "opt-in" to the task,
without opting-out of all the other tasks (and without enumerating all
the tasks by writing "ci-os-only: mingw,windows,macos,freebsd,linux".
That makes sense, and the logic looks right.  But that still has to be
commented during development to be run by cfbot.

Also, the first half was missing a closing quote.
https://cirrus-ci.com/build/5874178241855488

> > +  setup_additional_packages_script: |
> > > +    REM C:\msys64\usr\bin\pacman.exe -S --noconfirm busybox
> >
> > This should include choco, too.
> 
> Added pacman.exe line. Do we really need choco here? I don't think mingw
> would require any package via choco.

I guess choco isn't needed.

> Also is ending pacman.exe line with busybox intentional? I just added that
> line with "..." at the end instead of any package name.

Yeah, the busybox part was unintentional.

> > >  for item in `find "$sourcetree" -name Makefile -print -o -name GNUmakefile -print | grep -v
"$sourcetree/doc/src/sgml/images/"`;do
 
> > > -    filename=`expr "$item" : "$sourcetree\(.*\)"`
> > > -    if test ! -f "${item}.in"; then
> > > -        if cmp "$item" "$buildtree/$filename" >/dev/null 2>&1; then : ; else
> > > -            ln -fs "$item" "$buildtree/$filename" || exit 1
> > > -        fi
> > > -    fi
> > > +    filename=${item#$sourcetree}
> > > +    [ -e "$buildtree/$filename" ] && continue
> >
> > I fixed this to check for ".in" files as intended.
> >
> > It'd be a lot better if the image didn't take so long to start. :(
> 
> One question would be that should this patch include "prep_buildtree"? It
> doesn't seem to me like it's directly related to adding MinGW into CI but
> more like an improvement for builds on Windows.
> Maybe we can make it a seperate patch if it's necessary.

I don't know what direction that idea is going, but it makes working
with this patch a bit easier when configure is less slow.  Fine with me
to split it into a separate patch :)

> Sharing a new version of the patch. It also moves the above line so that it
> will apply to mingw task too. Otherwise mingw task was failing.

I saw that but hadn't tracked it down yet.  Do you know if the tar
failures were from a TAP test added since you first posted the mingw
patch, or ??

Also: your original patch said --host=x86_64-w64-mingw32, but the task
is called MinGW64.  The most recent patches don't use --host at all, and
were building for a 32 bit environment, even though the OS image says
MSYSTEM=UCRT64.

Also: right now src/test and src/interfaces/*/test aren't being built
during the build phase, which means that they're 1) not compiled in
parallel; and 2) not cached.  This isn't specific to MinGW.  Other than
compiling those dirs specifically, one option is to put
"always: upload_caches: ccache" after "test_world_script" (in that case,
if the CI instance is rescheduled during tests, the compilation won't be
pushed to cache).  Actually, it seems better to compile stuff during
"build" or else any compilation warnings should up in the middle of
"check-world.."

Also: I'm having second thoughts about the loop around ./configure.  It
could happen that a cached configure would succeed, but then the build
would later fail, and it wouldn't fix itself.  I think a slow configure
is okay for an "opt-in" task.

Also: my backtrace call was using a path to cygwin rather than msys.
This seemed to work before, but doesn't seem to be working now...

-- 
Justin

Hi,

On 2022-09-05 06:50:55 -0500, Justin Pryzby wrote:
> I saw that but hadn't tracked it down yet.  Do you know if the tar
> failures were from a TAP test added since you first posted the mingw
> patch, or ??

I think it's that msys now includes tar by default, but not sure.


> Also: your original patch said --host=x86_64-w64-mingw32, but the task
> is called MinGW64.  The most recent patches don't use --host at all, and
> were building for a 32 bit environment, even though the OS image says
> MSYSTEM=UCRT64.

I don't think you should need to use --host, that indicates cross compiling,
which we shouldn't do. I don't think the patch without --host targets 32bit -
the last time CI ran the patch, it built a 64bit PG:

https://cirrus-ci.com/task/5489471041830912?logs=configure#L231
[13:47:54.539] checking size of void *... (cached) 8
[13:47:54.557] checking size of size_t... (cached) 8

and the underlying commit didn't specify --host.


> Also: right now src/test and src/interfaces/*/test aren't being built
> during the build phase, which means that they're 1) not compiled in
> parallel; and 2) not cached.  This isn't specific to MinGW.  Other than
> compiling those dirs specifically, one option is to put
> "always: upload_caches: ccache" after "test_world_script" (in that case,
> if the CI instance is rescheduled during tests, the compilation won't be
> pushed to cache).  Actually, it seems better to compile stuff during
> "build" or else any compilation warnings should up in the middle of
> "check-world.."

I'd tackle that independently of this commit.


> Also: I'm having second thoughts about the loop around ./configure.  It
> could happen that a cached configure would succeed, but then the build
> would later fail, and it wouldn't fix itself.  I think a slow configure
> is okay for an "opt-in" task.

Agreed.

I think we can convert this to meson soon, and that seems a *lot* faster at
configure than autoconf on mingw. Not even close to as fast as on a modern-ish
linux, but not that painful.


Greetings,

Andres Freund

On Mon, Sep 05, 2022 at 04:52:17PM -0700, Andres Freund wrote:
> I don't think you should need to use --host, that indicates cross compiling,

This made me consider the idea of cross-compiling for windows under a
new linux task, and then running tests under Windows with a dependent
task.  I suppose that use -Og, in addition to CompilerWarnings, which
uses -O2.

cirrusci caches are (or can be) shared between tasks.  I got this mostly
working, with a few kludges to compile and install stuff under src/test.
This may be yet another idea that's obsoleted by meson.  WDYT?

-- 
Justin

Hi,

On 2022-09-21 16:18:43 +0300, Melih Mutlu wrote:
> I've been thinking about how to make the mingw task run only for this patch
> on cfbot and not for others. TBH, I couldn't come up with a nice way to
> achieve this.
> 
> Does anyone have any suggestions on this?

Add a commented-out trigger-type: manual and note in the commit message that
the committer needs to adjust that piece.

Greetings,

Andres Freund

Hi Melih,

On 2022-09-05 16:52:17 -0700, Andres Freund wrote:
> I think we can convert this to meson soon, and that seems a *lot* faster at
> configure than autoconf on mingw. Not even close to as fast as on a modern-ish
> linux, but not that painful.

Now that meson has been merged, could you try to adjust this patch so it
builds with meson?

Regards,

Andres

Hi,

On 2022-10-07 20:00:56 +0300, Melih Mutlu wrote:
> Attached patch is the adjusted version to build with meson.

Thanks!


> diff --git a/.cirrus.yml b/.cirrus.yml
> index 9f2282471a..7e6ebdf7b7 100644
> --- a/.cirrus.yml
> +++ b/.cirrus.yml
> @@ -35,6 +35,7 @@ on_failure_ac: &on_failure_ac
>        - "**/*.log"
>        - "**/*.diffs"
>        - "**/regress_log_*"
> +      - "**/*.stackdump"
>      type: text/plain


I think it might be easier to just set MSYS=winjitdebug
https://www.msys2.org/wiki/JIT-Debugging/#native-windows-processes-started-from-msys2
and then rely on the existing windows crash reporting stuff.

>    setup_additional_packages_script: |
>      REM choco install -y --no-progress ...
> -
>    # Use /DEBUG:FASTLINK to avoid high memory usage during linking
>    configure_script: |

You removed a bunch of newlines here and nearby - I assume that wasn't
intentional?


> +  mingw_info_script:
> +    - C:\msys64\usr\bin\dash.exe -lc "where gcc"
> +    - C:\msys64\usr\bin\dash.exe -lc "gcc --version"
> +    - C:\msys64\usr\bin\dash.exe -lc "where perl"
> +    - C:\msys64\usr\bin\dash.exe -lc "perl --version"
> +
> +  configure_script:
> +    - C:\msys64\usr\bin\dash.exe -lc "cd %CIRRUS_WORKING_DIR% &&
> +      meson setup --buildtype debug -Dcassert=true -Db_pch=true -DTAR=%TAR% build"

There's no need to use dash anymore, the amount of shell script run is
minimal.


> +  build_script:
> +    - C:\msys64\usr\bin\dash.exe -lc "cd %CIRRUS_WORKING_DIR% && ninja -C %BUILD_DIR%"
> +  upload_caches: ccache
> +
> +  test_world_script:
> +    - C:\msys64\usr\bin\dash.exe -lc "cd %CIRRUS_WORKING_DIR% && meson test --print-errorlogs --num-processes
%TEST_JOBS%-C %BUILD_DIR%"
 
> +

I think the "cd"s here are superfluous given the ninja -C %BUILD_DIR% etc.

Greetings,

Andres Freund

Hi,

On 2022-10-11 11:23:36 -0700, Andres Freund wrote:
> > +  build_script:
> > +    - C:\msys64\usr\bin\dash.exe -lc "cd %CIRRUS_WORKING_DIR% && ninja -C %BUILD_DIR%"
> > +  upload_caches: ccache

Only remembered that just after sending my email: When using b_pch=true (which
saves a lot of time on mingw) ccache won't cache much (IIRC just the pch files
themselves) unless you do something like
export CCACHE_SLOPPINESS=pch_defines,time_macros

$ ccache -z -C
Clearing... 100.0% [==============================================================================]

$ ninja clean && ccache -z && CCACHE_SLOPPINESS= time ninja src/bin/pg_test_fsync/pg_test_fsync.exe && ccache -s
[2/2] Cleaning
Cleaning... 200 files.
Statistics zeroed
[124/124] Linking target src/bin/pg_test_fsync/pg_test_fsync.exe
0.00user 0.01system 0:07.60elapsed 0%CPU (0avgtext+0avgdata 4936maxresident)k
0inputs+0outputs (1314major+0minor)pagefaults 0swaps
Summary:
  Hits:               0 /    1 (0.00 %)
    Direct:           0 /    1 (0.00 %)
    Preprocessed:     0 /    1 (0.00 %)
  Misses:             1
    Direct:           1
    Preprocessed:     1
  Uncacheable:      110

As you can see, most of the files are determined to be unachable. The build
took 7.6s.


$ ninja clean && ccache -z && CCACHE_SLOPPINESS=pch_defines,time_macros time ninja
src/bin/pg_test_fsync/pg_test_fsync.exe&& ccache -s
 
[2/2] Cleaning
Cleaning... 200 files.
Statistics zeroed
[124/124] Linking target src/bin/pg_test_fsync/pg_test_fsync.exe
0.00user 0.01system 0:09.91elapsed 0%CPU (0avgtext+0avgdata 4936maxresident)k
0inputs+0outputs (1313major+0minor)pagefaults 0swaps
Summary:
  Hits:               0 /  111 (0.00 %)
    Direct:           0 /  111 (0.00 %)
    Preprocessed:     0 /  111 (0.00 %)
  Misses:           111
    Direct:         111
    Preprocessed:   111
Primary storage:
  Hits:               0 /  216 (0.00 %)
  Misses:           216
  Cache size (GB): 0.05 / 5.00 (0.98 %)

Files are cachable, but are cache misses (because we cleaned the cache
above). The build took 9.91s.


$ ninja clean && ccache -z && CCACHE_SLOPPINESS=pch_defines,time_macros time ninja
src/bin/pg_test_fsync/pg_test_fsync.exe&& ccache -s
 
[2/2] Cleaning
Cleaning... 200 files.
Statistics zeroed
[124/124] Linking target src/bin/pg_test_fsync/pg_test_fsync.exe
0.00user 0.01system 0:02.40elapsed 0%CPU (0avgtext+0avgdata 4936maxresident)k
0inputs+0outputs (1314major+0minor)pagefaults 0swaps
Summary:
  Hits:             111 /  111 (100.0 %)
    Direct:         111 /  111 (100.0 %)
    Preprocessed:     0 /    0
  Misses:             0
    Direct:           0
    Preprocessed:     0
Primary storage:
  Hits:             222 /  222 (100.0 %)
  Misses:             0
  Cache size (GB): 0.05 / 5.00 (0.98 %)

Files are cachable, and hit the cache. The build takes 2.4s.


Using ccache's depend mode reduce the cache-miss case to 7.51s and the cache
hit case to 1.75s. So we should likely export CCACHE_DEPEND=1 as well.

Greetings,

Andres Freund

You can find the updated patch attached.

Hi,

On 2022-10-19 00:23:46 +0300, Melih Mutlu wrote:
>  Right, setting CHERE_INVOKING and removing all cd's work and look better.
> Thanks for the suggestion.

Agreed, good idea.


> +
> +  env:
> +    CCACHE_DIR: C:/msys64/ccache

It's a bit odd to separate the CCACHE_* variables from each other
(e.g. BUILD_DIR is inbetween them)...


> +    BUILD_DIR: "%CIRRUS_WORKING_DIR%/build"
> +    PYTHONHOME: C:/msys64/ucrt64

Perhaps add a comment explaining that otherwise plpython tests fail?


> +    MSYS: winjitdebug

With this src/tools/ci/cores_backtrace.sh shouldn't need to be modified
anymore afaict?


> +    CCACHE_SLOPPINESS: pch_defines,time_macros
> +    CCACHE_DEPEND: 1

I experimented a bit and it looks like ccache doesn't yet quite work in CI,
but only because the ccache needs to be larger. Looks like we need about
~400MB.

A fully cached build is ~2min


> +  configure_script: |
> +    %BASH_EXE% -lc "meson setup --buildtype debug -Dcassert=true -Db_pch=true -DTAR=%TAR% build"

With these buildflags the tests take about 23min37s. Using -Og I saw 18min26s,
with -O1 18m57s and with -O2 18m38s. There's obviously a fair bit of variance,
but it looks like we should use -Og. I think we considered that making compile
times too bad before, but it seems kinda ok now, with 11min. -O2 is 13min,
without providing further benefits.

I'd replace --buildtype debug with -Ddebug=true -Doptimization=g.


> +  build_script: |
> +    %BASH_EXE% -lc "cd %CIRRUS_WORKING_DIR% && ninja -C build"
>
Why do we still need this cd?


> +  upload_caches: ccache
> +
> +  test_world_script: |
> +    %BASH_EXE% -lc "meson test --print-errorlogs --num-processes %TEST_JOBS% -C build"

Seems like this could use %MTEST_ARGS%?


Greetings,

Andres Freund

Hi,

On 2022-10-19 17:59:22 +0300, Melih Mutlu wrote:
> All the things you mentioned above are done.

> Then I should increase CCACHE_MAXSIZE, right? Made it 500MB for MinGW.

Yes.

> +
> +  on_failure:
> +    <<: *on_failure_meson
> +    cores_script: |
> +      %BASH_EXE% -lc "cd build src/tools/ci/cores_backtrace.sh msys build/tmp_install"
> +

This is wrong - it should just archive the same files that the current windows
task does.

Other than that, I think this is basically ready?

Greetings,

Andres Freund

Hi,

On 2022-10-24 14:13:06 +0300, Melih Mutlu wrote:
> If you say so, then I think it's ready.

I pushed it with a few changes:

- I added an only_if, otherwise the task shows up (without running) even if
  you use ci-os-only: linux
- I added -Dnls=disabled - It seemed to add about 1.5min to the cached build
- Inlined the -l into BASH_EXE and renamed it to BASH
- The indentation of WINDOWS_ENVIRONMENT_BASE was irregular, leading to a
  larger diff. Some other similar cleanups.
- I added 'mingw' as a ci-os-only choice. Perhaps not the
  be-all-end-all. Perhaps we should use windows-{msvc,mingw,cygwin}? Or add
  ci-task-only?


I suspect we can make at least -Dssl=openssl work. Perhaps one of the uuid
implementation is available in msys as well?

Currently we end up with:
   External libraries
     bonjour                : NO
     bsd_auth               : NO
     gss                    : NO
     icu                    : YES 72.1
     ldap                   : YES
     libxml                 : YES 2.10.3
     libxslt                : YES 1.1.37
     llvm                   : NO
     lz4                    : YES 1.9.4
     nls                    : NO
     pam                    : NO
     plperl                 : YES
     plpython               : YES 3.10
     pltcl                  : YES
     readline               : YES
     selinux                : NO
     ssl                    : NO
     systemd                : NO
     uuid                   : NO
     zlib                   : YES 1.2.13
     zstd                   : YES 1.5.2

gss should also work if the is available in the msys repo.

Bonjour is apple only, bsd_auth bsd specific, selinux and systemd linux
specific and pam unixoid specific.

It could also be interesting to see if llvm works, but that might be more
work.

Greetings,

Andres Freund