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author | Georg Brandl <georg@python.org> | 2008-07-16 03:43:04 (GMT) |
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committer | Georg Brandl <georg@python.org> | 2008-07-16 03:43:04 (GMT) |
commit | 86b2fb9d77e483cc56e85bc4c96ac54f55427d39 (patch) | |
tree | 1f0a034d417db72fa03cfb506b0e27daf1dc0a4f /Python | |
parent | 3ccb78724127e3501067e8693fa15807e2777e9c (diff) | |
download | cpython-86b2fb9d77e483cc56e85bc4c96ac54f55427d39.zip cpython-86b2fb9d77e483cc56e85bc4c96ac54f55427d39.tar.gz cpython-86b2fb9d77e483cc56e85bc4c96ac54f55427d39.tar.bz2 |
Merged revisions 64623,64640,64665,64687,64689-64690,64719,64721,64735,64742,64744-64746,64756-64761,64767-64769,64771-64772,64774-64775,64788,64793,64835-64836 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r64623 | benjamin.peterson | 2008-07-01 21:51:54 +0200 (Tue, 01 Jul 2008) | 1 line
write a short little section for multiprocessing; it still needs help
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r64640 | georg.brandl | 2008-07-01 22:56:03 +0200 (Tue, 01 Jul 2008) | 2 lines
Add a comment about incref'ing w.
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r64665 | jesse.noller | 2008-07-02 18:56:51 +0200 (Wed, 02 Jul 2008) | 1 line
Add #!/usr/bin/env python for ben
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r64687 | andrew.kuchling | 2008-07-03 14:50:03 +0200 (Thu, 03 Jul 2008) | 1 line
Tweak wording
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r64689 | benjamin.peterson | 2008-07-03 14:57:35 +0200 (Thu, 03 Jul 2008) | 1 line
lowercase glossary term
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r64690 | benjamin.peterson | 2008-07-03 15:01:17 +0200 (Thu, 03 Jul 2008) | 1 line
let the term be linked
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r64719 | raymond.hettinger | 2008-07-05 04:11:55 +0200 (Sat, 05 Jul 2008) | 1 line
Update comment on prediction macros.
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r64721 | georg.brandl | 2008-07-05 12:07:18 +0200 (Sat, 05 Jul 2008) | 2 lines
Fix tabs.
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r64735 | mark.dickinson | 2008-07-05 17:25:48 +0200 (Sat, 05 Jul 2008) | 3 lines
Minor rewrite of cmath_log to work around a Sun compiler bug. See issue
#3168.
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r64742 | benjamin.peterson | 2008-07-05 18:29:38 +0200 (Sat, 05 Jul 2008) | 1 line
make regrtest aware of the lib2to3 resource
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r64744 | georg.brandl | 2008-07-05 18:43:45 +0200 (Sat, 05 Jul 2008) | 2 lines
Keep below 80 chars.
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r64745 | facundo.batista | 2008-07-05 21:19:50 +0200 (Sat, 05 Jul 2008) | 3 lines
Issue 3289. Removed two lines that ended doing nothing.
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r64746 | facundo.batista | 2008-07-05 22:39:59 +0200 (Sat, 05 Jul 2008) | 4 lines
Issue #3239. Differentiate the ascii call from the curses one and
the builtin one.
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r64756 | gregory.p.smith | 2008-07-06 09:16:40 +0200 (Sun, 06 Jul 2008) | 3 lines
- Issue #2113: Fix error in subprocess.Popen if the select system call is
interrupted by a signal.
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r64757 | benjamin.peterson | 2008-07-06 14:39:09 +0200 (Sun, 06 Jul 2008) | 1 line
remove test_compact_freelists from test_sys
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r64758 | gregory.p.smith | 2008-07-06 19:06:29 +0200 (Sun, 06 Jul 2008) | 2 lines
fix issue3304 - remove an incorrect PyMem_Free in fileio_init
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r64759 | georg.brandl | 2008-07-06 19:36:20 +0200 (Sun, 06 Jul 2008) | 2 lines
Fix opensearch template.
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r64760 | andrew.kuchling | 2008-07-06 19:43:16 +0200 (Sun, 06 Jul 2008) | 1 line
Wording fix
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r64761 | andrew.kuchling | 2008-07-06 19:44:17 +0200 (Sun, 06 Jul 2008) | 1 line
Add two items; rewrap paragraph
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r64767 | gregory.p.smith | 2008-07-07 06:31:58 +0200 (Mon, 07 Jul 2008) | 4 lines
- Issue #3309: Fix bz2.BZFile itererator to release its internal lock
properly when raising an exception due to the bz2file being closed.
Prevents a deadlock.
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r64768 | josiah.carlson | 2008-07-07 06:51:46 +0200 (Mon, 07 Jul 2008) | 2 lines
Fixed bugs 760475, 953599, and 1519.
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r64769 | gregory.p.smith | 2008-07-07 06:54:31 +0200 (Mon, 07 Jul 2008) | 2 lines
Add commented out #_sha256 and #_sha512 lines per issue 3183.
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r64771 | gregory.p.smith | 2008-07-07 07:09:12 +0200 (Mon, 07 Jul 2008) | 4 lines
- Issue #3094: httplib.HTTPSConnection Host: headers no longer include the
redundant ":443" port number designation when the connection is using the
default https port (443).
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r64772 | skip.montanaro | 2008-07-07 13:16:14 +0200 (Mon, 07 Jul 2008) | 2 lines
Correct grammar.
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r64774 | andrew.kuchling | 2008-07-07 18:51:09 +0200 (Mon, 07 Jul 2008) | 1 line
Fix example to match text
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r64775 | facundo.batista | 2008-07-07 19:02:59 +0200 (Mon, 07 Jul 2008) | 3 lines
Issue 3306. Better control for a lenght in findmax() function.
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r64788 | georg.brandl | 2008-07-08 09:05:23 +0200 (Tue, 08 Jul 2008) | 2 lines
Add missing ABCs to list.
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r64793 | nick.coghlan | 2008-07-08 16:21:42 +0200 (Tue, 08 Jul 2008) | 1 line
Add missing NEWS and ACK entries for r64791
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r64835 | raymond.hettinger | 2008-07-10 11:31:08 +0200 (Thu, 10 Jul 2008) | 1 line
Issue 3287: Raise correct exception for float inputs.
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r64836 | raymond.hettinger | 2008-07-10 12:28:41 +0200 (Thu, 10 Jul 2008) | 1 line
Use operator.index() instead of n.__index__().
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Diffstat (limited to 'Python')
-rw-r--r-- | Python/ceval.c | 24 | ||||
-rw-r--r-- | Python/pythonrun.c | 24 |
2 files changed, 25 insertions, 23 deletions
diff --git a/Python/ceval.c b/Python/ceval.c index ec279bf..c75caf6 100644 --- a/Python/ceval.c +++ b/Python/ceval.c @@ -617,18 +617,20 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) COMPARE_OP is often followed by JUMP_IF_FALSE or JUMP_IF_TRUE. And, those opcodes are often followed by a POP_TOP. - Verifying the prediction costs a single high-speed test of register + Verifying the prediction costs a single high-speed test of a register variable against a constant. If the pairing was good, then the - processor has a high likelihood of making its own successful branch - prediction which results in a nearly zero overhead transition to the - next opcode. - - A successful prediction saves a trip through the eval-loop including - its two unpredictable branches, the HAS_ARG test and the switch-case. - - If collecting opcode statistics, turn off prediction so that - statistics are accurately maintained (the predictions bypass - the opcode frequency counter updates). + processor's own internal branch predication has a high likelihood of + success, resulting in a nearly zero-overhead transition to the + next opcode. A successful prediction saves a trip through the eval-loop + including its two unpredictable branches, the HAS_ARG test and the + switch-case. Combined with the processor's internal branch prediction, + a successful PREDICT has the effect of making the two opcodes run as if + they were a single new opcode with the bodies combined. + + If collecting opcode statistics, your choices are to either keep the + predictions turned-on and interpret the results as if some opcodes + had been combined or turn-off predictions so that the opcode frequency + counter updates for both opcodes. */ #ifdef DYNAMIC_EXECUTION_PROFILE diff --git a/Python/pythonrun.c b/Python/pythonrun.c index d13563f..3a6cc91 100644 --- a/Python/pythonrun.c +++ b/Python/pythonrun.c @@ -229,14 +229,14 @@ Py_InitializeEx(int install_sigs) if (install_sigs) initsigs(); /* Signal handling stuff, including initintr() */ - /* Initialize warnings. */ - _PyWarnings_Init(); - if (PySys_HasWarnOptions()) { - PyObject *warnings_module = PyImport_ImportModule("warnings"); - if (!warnings_module) - PyErr_Clear(); - Py_XDECREF(warnings_module); - } + /* Initialize warnings. */ + _PyWarnings_Init(); + if (PySys_HasWarnOptions()) { + PyObject *warnings_module = PyImport_ImportModule("warnings"); + if (!warnings_module) + PyErr_Clear(); + Py_XDECREF(warnings_module); + } initmain(); /* Module __main__ */ if (!Py_NoSiteFlag) @@ -1246,7 +1246,7 @@ PyErr_PrintEx(int set_sys_last_vars) PyException_SetTraceback(v, tb); if (exception == NULL) return; - /* Now we know v != NULL too */ + /* Now we know v != NULL too */ if (set_sys_last_vars) { PySys_SetObject("last_type", exception); PySys_SetObject("last_value", v); @@ -2096,14 +2096,14 @@ PyRun_AnyFileFlags(FILE *fp, const char *name, PyCompilerFlags *flags) PyAPI_FUNC(PyObject *) PyRun_File(FILE *fp, const char *p, int s, PyObject *g, PyObject *l) { - return PyRun_FileExFlags(fp, p, s, g, l, 0, NULL); + return PyRun_FileExFlags(fp, p, s, g, l, 0, NULL); } #undef PyRun_FileEx PyAPI_FUNC(PyObject *) PyRun_FileEx(FILE *fp, const char *p, int s, PyObject *g, PyObject *l, int c) { - return PyRun_FileExFlags(fp, p, s, g, l, c, NULL); + return PyRun_FileExFlags(fp, p, s, g, l, c, NULL); } #undef PyRun_FileFlags @@ -2111,7 +2111,7 @@ PyAPI_FUNC(PyObject *) PyRun_FileFlags(FILE *fp, const char *p, int s, PyObject *g, PyObject *l, PyCompilerFlags *flags) { - return PyRun_FileExFlags(fp, p, s, g, l, 0, flags); + return PyRun_FileExFlags(fp, p, s, g, l, 0, flags); } #undef PyRun_SimpleFile |