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bpo-46072: Add --with-pystats configure option to simplify gathering of VM stats (GH-30116)

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* Simplify specialization stats collection macros.

* Add --enable-pystats option to configure.

* Update specialization summary script to handle larger number of kinds
This commit is contained in:
Mark Shannon 2021-12-15 15:32:32 +00:00 • committed by GitHub
parent 3a60bfef49
commit 342b93f9f2
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GPG key ID: 4AEE18F83AFDEB23
9 changed files with 73 additions and 44 deletions
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45
Python/specialize.c
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@ -39,7 +39,7 @@
*/
Py_ssize_t _Py_QuickenedCount = 0;
#if COLLECT_SPECIALIZATION_STATS
#ifdef Py_STATS
SpecializationStats _specialization_stats[256] = { 0 };
#define ADD_STAT_TO_DICT(res, field) \
@ -71,7 +71,6 @@ stats_to_dict(SpecializationStats *stats)
ADD_STAT_TO_DICT(res, miss);
ADD_STAT_TO_DICT(res, deopt);
ADD_STAT_TO_DICT(res, unquickened);
#if COLLECT_SPECIALIZATION_STATS_DETAILED
PyObject *failure_kinds = PyTuple_New(SPECIALIZATION_FAILURE_KINDS);
if (failure_kinds == NULL) {
Py_DECREF(res);
@ -92,7 +91,6 @@ stats_to_dict(SpecializationStats *stats)
return NULL;
}
Py_DECREF(failure_kinds);
#endif
return res;
}
#undef ADD_STAT_TO_DICT
@ -113,7 +111,7 @@ add_stat_dict(
return err;
}
#if COLLECT_SPECIALIZATION_STATS
#ifdef Py_STATS
PyObject*
_Py_GetSpecializationStats(void) {
PyObject *stats = PyDict_New();
@ -151,35 +149,34 @@ print_stats(FILE *out, SpecializationStats *stats, const char *name)
PRINT_STAT(name, miss);
PRINT_STAT(name, deopt);
PRINT_STAT(name, unquickened);
#if PRINT_SPECIALIZATION_STATS_DETAILED
for (int i = 0; i < SPECIALIZATION_FAILURE_KINDS; i++) {
fprintf(out, " %s.specialization_failure_kinds[%d] : %" PRIu64 "\n",
name, i, stats->specialization_failure_kinds[i]);
}
#endif
}
#undef PRINT_STAT
void
_Py_PrintSpecializationStats(void)
_Py_PrintSpecializationStats(int to_file)
{
FILE *out = stderr;
#if PRINT_SPECIALIZATION_STATS_TO_FILE
/* Write to a file instead of stderr. */
if (to_file) {
/* Write to a file instead of stderr. */
# ifdef MS_WINDOWS
const char *dirname = "c:\\temp\\py_stats\\";
const char *dirname = "c:\\temp\\py_stats\\";
# else
const char *dirname = "/tmp/py_stats/";
const char *dirname = "/tmp/py_stats/";
# endif
char buf[48];
sprintf(buf, "%s%u_%u.txt", dirname, (unsigned)clock(), (unsigned)rand());
FILE *fout = fopen(buf, "w");
if (fout) {
out = fout;
char buf[48];
sprintf(buf, "%s%u_%u.txt", dirname, (unsigned)clock(), (unsigned)rand());
FILE *fout = fopen(buf, "w");
if (fout) {
out = fout;
}
}
else {
fprintf(out, "Specialization stats:\n");
}
#else
fprintf(out, "Specialization stats:\n");
#endif
print_stats(out, &_specialization_stats[LOAD_ATTR], "load_attr");
print_stats(out, &_specialization_stats[LOAD_GLOBAL], "load_global");
print_stats(out, &_specialization_stats[LOAD_METHOD], "load_method");
@ -194,7 +191,7 @@ _Py_PrintSpecializationStats(void)
}
}
#if COLLECT_SPECIALIZATION_STATS_DETAILED
#ifdef Py_STATS
#define SPECIALIZATION_FAIL(opcode, kind) _specialization_stats[opcode].specialization_failure_kinds[kind]++
@ -860,7 +857,7 @@ success:
}
#if COLLECT_SPECIALIZATION_STATS_DETAILED
#ifdef Py_STATS
static int
load_method_fail_kind(DesciptorClassification kind)
{
@ -1086,7 +1083,7 @@ success:
return 0;
}
#if COLLECT_SPECIALIZATION_STATS_DETAILED
#ifdef Py_STATS
static int
binary_subscr_fail_kind(PyTypeObject *container_type, PyObject *sub)
{
@ -1380,7 +1377,7 @@ specialize_py_call(
return 0;
}
#if COLLECT_SPECIALIZATION_STATS_DETAILED
#ifdef Py_STATS
static int
builtin_call_fail_kind(int ml_flags)
{
@ -1459,7 +1456,7 @@ specialize_c_call(PyObject *callable, _Py_CODEUNIT *instr, int nargs,
}
}
#if COLLECT_SPECIALIZATION_STATS_DETAILED
#ifdef Py_STATS
static int
call_fail_kind(PyObject *callable)
{