Resguardo inicial

linux-7.2.3/tools/testing/selftests/turbostat/added_perf_counters.py

@@ -0,0 +1,178 @@
+#!/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+
+import subprocess
+from shutil import which
+from os import pread
+
+class PerfCounterInfo:
+	def __init__(self, subsys, event):
+		self.subsys = subsys
+		self.event = event
+
+	def get_perf_event_name(self):
+		return f'{self.subsys}/{self.event}/'
+
+	def get_turbostat_perf_id(self, counter_scope, counter_type, column_name):
+		return f'perf/{self.subsys}/{self.event},{counter_scope},{counter_type},{column_name}'
+
+PERF_COUNTERS_CANDIDATES = [
+	PerfCounterInfo('msr', 'mperf'),
+	PerfCounterInfo('msr', 'aperf'),
+	PerfCounterInfo('msr', 'tsc'),
+	PerfCounterInfo('cstate_core', 'c1-residency'),
+	PerfCounterInfo('cstate_core', 'c6-residency'),
+	PerfCounterInfo('cstate_core', 'c7-residency'),
+	PerfCounterInfo('cstate_pkg', 'c2-residency'),
+	PerfCounterInfo('cstate_pkg', 'c3-residency'),
+	PerfCounterInfo('cstate_pkg', 'c6-residency'),
+	PerfCounterInfo('cstate_pkg', 'c7-residency'),
+	PerfCounterInfo('cstate_pkg', 'c8-residency'),
+	PerfCounterInfo('cstate_pkg', 'c9-residency'),
+	PerfCounterInfo('cstate_pkg', 'c10-residency'),
+]
+present_perf_counters = []
+
+def check_perf_access():
+	perf = which('perf')
+	if perf is None:
+		print('SKIP: Could not find perf binary, thus could not determine perf access.')
+		return False
+
+	def has_perf_counter_access(counter_name):
+		proc_perf = subprocess.run([perf, 'stat', '-e', counter_name, '--timeout', '10'],
+							 capture_output = True)
+
+		if proc_perf.returncode != 0:
+			print(f'SKIP: Could not read {counter_name} perf counter.')
+			return False
+
+		if b'<not supported>' in proc_perf.stderr:
+			print(f'SKIP: Could not read {counter_name} perf counter.')
+			return False
+
+		return True
+
+	for counter in PERF_COUNTERS_CANDIDATES:
+		if has_perf_counter_access(counter.get_perf_event_name()):
+			present_perf_counters.append(counter)
+
+	if len(present_perf_counters) == 0:
+		print('SKIP: Could not read any perf counter.')
+		return False
+
+	if len(present_perf_counters) != len(PERF_COUNTERS_CANDIDATES):
+		print(f'WARN: Could not access all of the counters - some will be left untested')
+
+	return True
+
+if not check_perf_access():
+	exit(0)
+
+turbostat_counter_source_opts = ['']
+
+turbostat = which('turbostat')
+if turbostat is None:
+	print('Could not find turbostat binary')
+	exit(1)
+
+timeout = which('timeout')
+if timeout is None:
+	print('Could not find timeout binary')
+	exit(1)
+
+proc_turbostat = subprocess.run([turbostat, '--list'], capture_output = True)
+if proc_turbostat.returncode != 0:
+	print(f'turbostat failed with {proc_turbostat.returncode}')
+	exit(1)
+
+EXPECTED_COLUMNS_DEBUG_DEFAULT = [b'usec', b'Time_Of_Day_Seconds', b'APIC', b'X2APIC']
+
+expected_columns = [b'CPU']
+counters_argv = []
+for counter in present_perf_counters:
+	if counter.subsys == 'cstate_core':
+		counter_scope = 'core'
+	elif counter.subsys == 'cstate_pkg':
+		counter_scope = 'package'
+	else:
+		counter_scope = 'cpu'
+
+	counter_type = 'delta'
+	column_name = counter.event
+
+	cparams = counter.get_turbostat_perf_id(
+		counter_scope = counter_scope,
+		counter_type = counter_type,
+		column_name = column_name
+	)
+	expected_columns.append(column_name.encode())
+	counters_argv.extend(['--add', cparams])
+
+expected_columns_debug = EXPECTED_COLUMNS_DEBUG_DEFAULT + expected_columns
+
+def gen_user_friendly_cmdline(argv_):
+	argv = argv_[:]
+	ret = ''
+
+	while len(argv) != 0:
+		arg = argv.pop(0)
+		arg_next = ''
+
+		if arg in ('-i', '--show', '--add'):
+			arg_next = argv.pop(0) if len(argv) > 0 else ''
+
+		ret += f'{arg} {arg_next} \\\n\t'
+
+	# Remove the last separator and return
+	return ret[:-4]
+
+#
+# Run turbostat for some time and send SIGINT
+#
+timeout_argv = [timeout, '--preserve-status', '-s', 'SIGINT', '-k', '3', '0.2s']
+turbostat_argv = [turbostat, '-i', '0.50', '--show', 'CPU'] + counters_argv
+
+def check_columns_or_fail(expected_columns: list, actual_columns: list):
+	if len(actual_columns) != len(expected_columns):
+		print(f'turbostat column check failed\n{expected_columns=}\n{actual_columns=}')
+		exit(1)
+
+	failed = False
+	for expected_column in expected_columns:
+		if expected_column not in actual_columns:
+			print(f'turbostat column check failed: missing column {expected_column.decode()}')
+			failed = True
+
+	if failed:
+		exit(1)
+
+cmdline = gen_user_friendly_cmdline(turbostat_argv)
+print(f'Running turbostat with:\n\t{cmdline}\n... ', end = '', flush = True)
+proc_turbostat = subprocess.run(timeout_argv + turbostat_argv, capture_output = True)
+if proc_turbostat.returncode != 0:
+	print(f'turbostat failed with {proc_turbostat.returncode}')
+	exit(1)
+
+actual_columns = proc_turbostat.stdout.split(b'\n')[0].split(b'\t')
+check_columns_or_fail(expected_columns, actual_columns)
+print('OK')
+
+#
+# Same, but with --debug
+#
+# We explicitly specify '--show CPU' to make sure turbostat
+# don't show a bunch of default counters instead.
+#
+turbostat_argv.append('--debug')
+
+cmdline = gen_user_friendly_cmdline(turbostat_argv)
+print(f'Running turbostat (in debug mode) with:\n\t{cmdline}\n... ', end = '', flush = True)
+proc_turbostat = subprocess.run(timeout_argv + turbostat_argv, capture_output = True)
+if proc_turbostat.returncode != 0:
+	print(f'turbostat failed with {proc_turbostat.returncode}')
+	exit(1)
+
+actual_columns = proc_turbostat.stdout.split(b'\n')[0].split(b'\t')
+check_columns_or_fail(expected_columns_debug, actual_columns)
+print('OK')

linux-7.2.3/tools/testing/selftests/turbostat/defcolumns.py

@@ -0,0 +1,60 @@
+#!/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+
+import subprocess
+from shutil import which
+
+turbostat = which('turbostat')
+if turbostat is None:
+	print('Could not find turbostat binary')
+	exit(1)
+
+timeout = which('timeout')
+if timeout is None:
+	print('Could not find timeout binary')
+	exit(1)
+
+proc_turbostat = subprocess.run([turbostat, '--list'], capture_output = True)
+if proc_turbostat.returncode != 0:
+	print(f'turbostat failed with {proc_turbostat.returncode}')
+	exit(1)
+
+#
+# By default --list reports also "usec" and "Time_Of_Day_Seconds" columns
+# which are only visible when running with --debug.
+#
+expected_columns_debug = proc_turbostat.stdout.replace(b',', b'\t').strip()
+expected_columns = expected_columns_debug.replace(b'usec\t', b'').replace(b'Time_Of_Day_Seconds\t', b'').replace(b'X2APIC\t', b'').replace(b'APIC\t', b'')
+
+#
+# Run turbostat with no options for 10 seconds and send SIGINT
+#
+timeout_argv = [timeout, '--preserve-status', '-s', 'SIGINT', '-k', '3', '1s']
+turbostat_argv = [turbostat, '-i', '0.250']
+
+print(f'Running turbostat with {turbostat_argv=}... ', end = '', flush = True)
+proc_turbostat = subprocess.run(timeout_argv + turbostat_argv, capture_output = True)
+if proc_turbostat.returncode != 0:
+	print(f'turbostat failed with {proc_turbostat.returncode}')
+	exit(1)
+actual_columns = proc_turbostat.stdout.split(b'\n')[0]
+if expected_columns != actual_columns:
+	print(f'turbostat column check failed\n{expected_columns=}\n{actual_columns=}')
+	exit(1)
+print('OK')
+
+#
+# Same, but with --debug
+#
+turbostat_argv.append('--debug')
+
+print(f'Running turbostat with {turbostat_argv=}... ', end = '', flush = True)
+proc_turbostat = subprocess.run(timeout_argv + turbostat_argv, capture_output = True)
+if proc_turbostat.returncode != 0:
+	print(f'turbostat failed with {proc_turbostat.returncode}')
+	exit(1)
+actual_columns = proc_turbostat.stdout.split(b'\n')[0]
+if expected_columns_debug != actual_columns:
+	print(f'turbostat column check failed\n{expected_columns_debug=}\n{actual_columns=}')
+	exit(1)
+print('OK')

linux-7.2.3/tools/testing/selftests/turbostat/smi_aperf_mperf.py

@@ -0,0 +1,157 @@
+#!/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+
+import subprocess
+from shutil import which
+from os import pread
+
+# CDLL calls dlopen underneath.
+# Calling it with None (null), we get handle to the our own image (python interpreter).
+# We hope to find sched_getcpu() inside ;]
+# This is a bit ugly, but helps shipping working software, so..
+try:
+	import ctypes
+
+	this_image = ctypes.CDLL(None)
+	BASE_CPU = this_image.sched_getcpu()
+except:
+	BASE_CPU = 0 # If we fail, set to 0 and pray it's not offline.
+
+MSR_IA32_MPERF = 0x000000e7
+MSR_IA32_APERF = 0x000000e8
+
+def check_perf_access():
+	perf = which('perf')
+	if perf is None:
+		print('SKIP: Could not find perf binary, thus could not determine perf access.')
+		return False
+
+	def has_perf_counter_access(counter_name):
+		proc_perf = subprocess.run([perf, 'stat', '-e', counter_name, '--timeout', '10'],
+					    capture_output = True)
+
+		if proc_perf.returncode != 0:
+			print(f'SKIP: Could not read {counter_name} perf counter, assuming no access.')
+			return False
+
+		if b'<not supported>' in proc_perf.stderr:
+			print(f'SKIP: Could not read {counter_name} perf counter, assuming no access.')
+			return False
+
+		return True
+
+	if not has_perf_counter_access('msr/mperf/'):
+		return False
+	if not has_perf_counter_access('msr/aperf/'):
+		return False
+	if not has_perf_counter_access('msr/smi/'):
+		return False
+
+	return True
+
+def check_msr_access():
+	try:
+		file_msr = open(f'/dev/cpu/{BASE_CPU}/msr', 'rb')
+	except:
+		return False
+
+	if len(pread(file_msr.fileno(), 8, MSR_IA32_MPERF)) != 8:
+		return False
+
+	if len(pread(file_msr.fileno(), 8, MSR_IA32_APERF)) != 8:
+		return False
+
+	return True
+
+has_perf_access = check_perf_access()
+has_msr_access = check_msr_access()
+
+turbostat_counter_source_opts = ['']
+
+if has_msr_access:
+	turbostat_counter_source_opts.append('--no-perf')
+else:
+	print('SKIP: doesn\'t have MSR access, skipping run with --no-perf')
+
+if has_perf_access:
+	turbostat_counter_source_opts.append('--no-msr')
+else:
+	print('SKIP: doesn\'t have perf access, skipping run with --no-msr')
+
+if not has_msr_access and not has_perf_access:
+	print('SKIP: No MSR nor perf access detected. Skipping the tests entirely')
+	exit(0)
+
+turbostat = which('turbostat')
+if turbostat is None:
+	print('Could not find turbostat binary')
+	exit(1)
+
+timeout = which('timeout')
+if timeout is None:
+	print('Could not find timeout binary')
+	exit(1)
+
+proc_turbostat = subprocess.run([turbostat, '--list'], capture_output = True)
+if proc_turbostat.returncode != 0:
+	print(f'turbostat failed with {proc_turbostat.returncode}')
+	exit(1)
+
+EXPECTED_COLUMNS_DEBUG_DEFAULT = b'usec\tTime_Of_Day_Seconds\tAPIC\tX2APIC'
+
+SMI_APERF_MPERF_DEPENDENT_BICS = [
+	'SMI',
+	'Avg_MHz',
+	'Busy%',
+	'Bzy_MHz',
+]
+if has_perf_access:
+	SMI_APERF_MPERF_DEPENDENT_BICS.append('IPC')
+
+for bic in SMI_APERF_MPERF_DEPENDENT_BICS:
+	for counter_source_opt in turbostat_counter_source_opts:
+
+		# Ugly special case, but it is what it is..
+		if counter_source_opt == '--no-perf' and bic == 'IPC':
+			continue
+
+		expected_columns = bic.encode()
+		expected_columns_debug = EXPECTED_COLUMNS_DEBUG_DEFAULT + f'\t{bic}'.encode()
+
+		#
+		# Run turbostat for some time and send SIGINT
+		#
+		timeout_argv = [timeout, '--preserve-status', '-s', 'SIGINT', '-k', '3', '0.2s']
+		turbostat_argv = [turbostat, '-i', '0.50', '--show', bic]
+
+		if counter_source_opt:
+			turbostat_argv.append(counter_source_opt)
+
+		print(f'Running turbostat with {turbostat_argv=}... ', end = '', flush = True)
+		proc_turbostat = subprocess.run(timeout_argv + turbostat_argv, capture_output = True)
+		if proc_turbostat.returncode != 0:
+			print(f'turbostat failed with {proc_turbostat.returncode}')
+			exit(1)
+
+		actual_columns = proc_turbostat.stdout.split(b'\n')[0]
+		if expected_columns != actual_columns:
+			print(f'turbostat column check failed\n{expected_columns=}\n{actual_columns=}')
+			exit(1)
+		print('OK')
+
+		#
+		# Same, but with --debug
+		#
+		turbostat_argv.append('--debug')
+
+		print(f'Running turbostat with {turbostat_argv=}... ', end = '', flush = True)
+		proc_turbostat = subprocess.run(timeout_argv + turbostat_argv, capture_output = True)
+		if proc_turbostat.returncode != 0:
+			print(f'turbostat failed with {proc_turbostat.returncode}')
+			exit(1)
+
+		actual_columns = proc_turbostat.stdout.split(b'\n')[0]
+		if expected_columns_debug != actual_columns:
+			print(f'turbostat column check failed\n{expected_columns_debug=}\n{actual_columns=}')
+			exit(1)
+		print('OK')