Commit Graph

24 Commits

Author SHA1 Message Date
Walter Dörwald 2e4fd3765f Fix typo. 2006-11-15 16:23:46 +00:00
Tim Peters 9ea89d2a19 In a PYMALLOC_DEBUG build obmalloc adds extra debugging info
to each allocated block.  This was using 4 bytes for each such
piece of info regardless of platform.  This didn't really matter
before (proof: no bug reports, and the debug-build obmalloc would
have assert-failed if it was ever asked for a chunk of memory
>= 2**32 bytes), since container indices were plain ints.  But after
the Py_ssize_t changes, it's at least theoretically possible to
allocate a list or string whose guts exceed 2**32 bytes, and the
PYMALLOC_DEBUG routines would fail then (having only 4 bytes
to record the originally requested size).

Now we use sizeof(size_t) bytes for each of a PYMALLOC_DEBUG
build's extra debugging fields.  This won't make any difference
on 32-bit boxes, but will add 16 bytes to each allocation in
a debug build on a 64-bit box.
2006-06-04 03:26:02 +00:00
Martin v. Löwis d18d5a3153 Update instructions for EXTRA_CFLAGS: configure ignores
them; they have to be passed to make.
2006-04-16 18:55:07 +00:00
Brett Cannon 789fd005e0 Fix typo in envvar name. 2005-11-07 21:42:42 +00:00
Brett Cannon 08cd598c21 Introduced EXTRA_CFLAGS as an environment variable used by the Makefile. Meant
to be used for flags that change binary compatibility.

Distutils was tweaked to also use the variable if used during compilation of
the interpreter.
2005-04-24 22:26:38 +00:00
Brett Cannon 49ab700cc1 Clarify usage of OPT by noting that if it is set the default values will be
left out.
2005-04-20 20:49:39 +00:00
Brett Cannon a267563f43 Add a line explaining what env var to use to set the compiler flags and an
example of how to do it so that it is passed directly to ./configure .
2005-04-19 20:28:09 +00:00
Michael W. Hudson 46e6d92dc1 tweaks, small updates 2005-01-18 15:53:59 +00:00
Michael W. Hudson 800ba2375a This is my patch:
[ 1005891 ] support --with-tsc on PPC

plus a trivial change to settscdump's docstring and a Misc/NEWS entry.
2004-08-12 18:19:17 +00:00
Tim Peters 21d7d4d5ca _Py_PrintReferenceAddresses(): also print the type name. In real use
I'm finding some pretty baffling output, like reprs consisting entirely
of three left parens.  At least this will let us know what type the object
is (it's not str -- there's no quote character in the repr).

New tool combinerefs.py, to combine the two output blocks produced via
PYTHONDUMPREFS.
2003-04-18 00:45:59 +00:00
Tim Peters 78be7993b6 When Py_TRACE_REFS is defined, a list of all live objects is maintained in
a doubly-linked list, exposed by sys.getobjects().  Unfortunately, it's not
really all live objects, and it seems my fate to bump into programs where
sys.gettotalrefcount() keeps going up but where the reference leaks aren't
accounted for by anything in the list of all objects.

This patch helps a little:  if COUNT_ALLOCS is also defined, from now on
type objects will also appear in this list, provided at least one object
of a type has been allocated.
2003-03-23 02:51:01 +00:00
Jeremy Hylton 985eba53f5 Small function call optimization and special build option for call stats.
-DCALL_PROFILE: Count the number of function calls executed.

When this symbol is defined, the ceval mainloop and helper functions
count the number of function calls made.  It keeps detailed statistics
about what kind of object was called and whether the call hit any of
the special fast paths in the code.

Optimization:

When we take the fast_function() path, which seems to be taken for
most function calls, and there is minimal frame setup to do, avoid
call PyEval_EvalCodeEx().  The eval code ex function does a lot of
work to handle keywords args and star args, free variables,
generators, etc.  The inlined version simply allocates the frame and
copies the arguments values into the frame.

The optimization gets a little help from compile.c which adds a
CO_NOFREE flag to code objects that don't have free variables or cell
variables.  This change allows fast_function() to get into the fast
path with fewer tests.

I measure a couple of percent speedup in pystone with this change, but
there's surely more that can be done.
2003-02-05 23:13:00 +00:00
Michael W. Hudson 202a4b6fdd Repair fill-paragraph damage.
Clarify LLTRACE description.  It was introduced in 1992, revision 2.20 of
ceval.c, well before Python 1.0!
2002-07-30 15:25:57 +00:00
Michael W. Hudson a6255238b2 add description of LLTRACE. 2002-07-30 09:49:29 +00:00
Guido van Rossum 0c08864fbb Replace rare tabs with 4 spaces, assuming that's what was intended. 2002-07-11 01:04:32 +00:00
Tim Peters 8acdf7a935 Noted the releases in which COUNT_ALLOCS can blow up. 2002-07-11 00:38:05 +00:00
Tim Peters 62fc52e6a1 Recorded the introduction release for each gimmick, as best I was able to
reconstruct that info.
Filled out some sketchy explanations of pragmatics.
2002-07-11 00:23:58 +00:00
Tim Peters 20c8a04a08 Some clarifications. 2002-07-11 00:02:52 +00:00
Tim Peters 889f61dcfb Documented PYMALLOC_DEBUG. This completes primary coverage of all the
"special builds" I ever use.  If you use others, document them here, or
don't be surprised if I rip out the code for them <0.5 wink>.
2002-07-10 19:29:49 +00:00
Tim Peters a788f5ef02 Clarified sys.getobjects() pragmatics. 2002-07-10 18:47:03 +00:00
Tim Peters 44c1a7bc51 Typo repair. 2002-07-09 19:27:20 +00:00
Tim Peters 48ba649ae3 Moved COUNT_ALLOCS down and finished writing its description. 2002-07-09 19:24:54 +00:00
Tim Peters 3486f617a1 Checkin comment. 2002-07-09 18:48:32 +00:00
Tim Peters 6045d48e5c New file to try to document the "special build" preprocessor symbols.
Incomplete.  Add to it!  Once it settles down, it would make a nice
appendix in the real docs.
2002-07-09 18:35:34 +00:00