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[3.9] bpo-40630: Add tracemalloc.reset_peak (GH-20102) (GH-20545)

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* bpo-40630: Add tracemalloc.reset_peak (GH-20102, cherrypick 8b62644)

The reset_peak function sets the peak memory size to the current size,
representing a resetting of that metric. This allows for recording the
peak of specific sections of code, ignoring other code that may have
had a higher peak (since the most recent `tracemalloc.start()` or
tracemalloc.clear_traces()` call).

* Adjust docs to point to 3.9
This commit is contained in:
Huon Wilson 2020-06-02 03:26:22 +10:00 • committed by GitHub
parent 410b730c20
commit 3c7609a23c
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7 changed files with 138 additions and 1 deletions
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25
Modules/_tracemalloc.c
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@ -1643,6 +1643,30 @@ _tracemalloc_get_traced_memory_impl(PyObject *module)
return Py_BuildValue("nn", size, peak_size);
}
/*[clinic input]
_tracemalloc.reset_peak
Set the peak size of memory blocks traced by tracemalloc to the current size.
Do nothing if the tracemalloc module is not tracing memory allocations.
[clinic start generated code]*/
static PyObject *
_tracemalloc_reset_peak_impl(PyObject *module)
/*[clinic end generated code: output=140c2870f691dbb2 input=18afd0635066e9ce]*/
{
if (!_Py_tracemalloc_config.tracing) {
Py_RETURN_NONE;
}
TABLES_LOCK();
tracemalloc_peak_traced_memory = tracemalloc_traced_memory;
TABLES_UNLOCK();
Py_RETURN_NONE;
}
static PyMethodDef module_methods[] = {
_TRACEMALLOC_IS_TRACING_METHODDEF
@ -1654,6 +1678,7 @@ static PyMethodDef module_methods[] = {
_TRACEMALLOC_GET_TRACEBACK_LIMIT_METHODDEF
_TRACEMALLOC_GET_TRACEMALLOC_MEMORY_METHODDEF
_TRACEMALLOC_GET_TRACED_MEMORY_METHODDEF
_TRACEMALLOC_RESET_PEAK_METHODDEF
/* sentinel */
{NULL, NULL}
};