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Issue #2467: gc.DEBUG_STATS reports invalid elapsed times. 

Patch by Neil Schemenauer, very slightly modified.
This commit is contained in:
Antoine Pitrou 2008-12-17 22:46:54 +00:00
parent 1a707981c8
commit 73c0e65fc3
2 changed files with 30 additions and 23 deletions
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4
Misc/NEWS
View File

@ -12,6 +12,10 @@ What's New in Python 2.7 alpha 1
Core and Builtins
-----------------
- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
print elapsed times, not only when some objects are uncollectable /
unreachable. Original patch by Neil Schemenauer.
- Issue #3439: Add a bit_length method to int and long.
- Issue #2183: Simplify and optimize bytecode for list comprehensions.

49
Modules/gcmodule.c
View File

@ -740,6 +740,24 @@ clear_freelists(void)
(void)PyFloat_ClearFreeList();
}
static double
get_time(void)
{
double result = 0;
if (tmod != NULL) {
PyObject *f = PyObject_CallMethod(tmod, "time", NULL);
if (f == NULL) {
PyErr_Clear();
}
else {
if (PyFloat_Check(f))
result = PyFloat_AsDouble(f);
Py_DECREF(f);
}
}
return result;
}
/* This is the main function. Read this to understand how the
* collection process works. */
static Py_ssize_t
@ -762,16 +780,7 @@ collect(int generation)
}
if (debug & DEBUG_STATS) {
if (tmod != NULL) {
PyObject *f = PyObject_CallMethod(tmod, "time", NULL);
if (f == NULL) {
PyErr_Clear();
}
else {
t1 = PyFloat_AsDouble(f);
Py_DECREF(f);
}
}
t1 = get_time();
PySys_WriteStderr("gc: collecting generation %d...\n",
generation);
PySys_WriteStderr("gc: objects in each generation:");
@ -844,17 +853,6 @@ collect(int generation)
if (debug & DEBUG_COLLECTABLE) {
debug_cycle("collectable", FROM_GC(gc));
}
if (tmod != NULL && (debug & DEBUG_STATS)) {
PyObject *f = PyObject_CallMethod(tmod, "time", NULL);
if (f == NULL) {
PyErr_Clear();
}
else {
t1 = PyFloat_AsDouble(f)-t1;
Py_DECREF(f);
PySys_WriteStderr("gc: %.4fs elapsed.\n", t1);
}
}
}
/* Clear weakrefs and invoke callbacks as necessary. */
@ -876,14 +874,19 @@ collect(int generation)
debug_cycle("uncollectable", FROM_GC(gc));
}
if (debug & DEBUG_STATS) {
double t2 = get_time();
if (m == 0 && n == 0)
PySys_WriteStderr("gc: done.\n");
PySys_WriteStderr("gc: done");
else
PySys_WriteStderr(
"gc: done, "
"%" PY_FORMAT_SIZE_T "d unreachable, "
"%" PY_FORMAT_SIZE_T "d uncollectable.\n",
"%" PY_FORMAT_SIZE_T "d uncollectable",
n+m, n);
if (t1 && t2) {
PySys_WriteStderr(", %.4fs elapsed", t2-t1);
}
PySys_WriteStderr(".\n");
}
/* Append instances in the uncollectable set to a Python