def test_set_rates(self):
supported_rates = []
errors = 0
print('EMC frequency scaling:')
print('======================')
with debugfs.open('emc/supported_rates') as f:
for line in f:
supported_rates.extend(line.split())
width = max([len(x) for x in supported_rates])
with debugfs.open('emc/rate') as f:
current = f.read().strip()
print('- supported rates: (* = current)');
for rate in supported_rates:
if rate == current:
print(' - %*s' % (width, rate), '*')
else:
print(' - %*s' % (width, rate))
print('- testing:')
for rate in supported_rates:
log.begin(' - %*s...' % (width, rate))
actual = emc_set_rate(rate)
if actual != rate:
log.end('reported %s' % actual)
errors += 1
else:
log.end()
log.begin('- resetting to old rate: %s...' % current)
actual = emc_set_rate(current)
if actual != current:
log.end('reported %s' % actual)
else:
log.end()
self.longMessage = False
self.assertEqual(errors, 0, 'not all rate changes succeeded')
def stopTest(self, test):
super().stopTest(test)
sys.stderr = self.stderr
sys.stdout = self.stdout
log.end()
def test_set_rates(self):
cpuset = system.CPUSet()
for cpu in cpuset:
print('- CPU#%u' % cpu.num)
cpu = CPU(cpu.num)
log.begin(' - switching to userspace governor')
governor = cpu.governor
try:
cpu.governor = 'userspace'
except Exception as e:
log.end(e)
continue
else:
log.end()
for rate in cpu.supported_rates:
log.begin(' - setting rate %s' % rate)
try:
cpu.rate = rate
except Exception as e:
log.end(e)
else:
log.end()
log.begin(' - restoring %s governor' % governor)
try:
cpu.governor = governor
except Exception as e:
log.end(e)
else:
log.end()