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x86_energy_perf_policy fix #108

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x86_energy_perf_policy fix #108

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8fd6050
x86_energy_perf_policy fix
mikethebos Mar 12, 2019
28ab275
efficiency: exit_event_wait
mikethebos Mar 12, 2019
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20 changes: 7 additions & 13 deletions lenovo_fix.py
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Original file line number Diff line number Diff line change
Expand Up @@ -503,18 +503,9 @@ def calc_reg_values(platform_info, config):

def set_hwp(pref):
# set HWP energy performance hints
assert pref in ('performance', 'balance_performance', 'default', 'balance_power', 'power')
CPUs = [
'/sys/devices/system/cpu/cpu{:d}/cpufreq/energy_performance_preference'.format(x) for x in range(cpu_count())
]
for i, c in enumerate(CPUs):
with open(c, 'wb') as f:
f.write(pref.encode())
if args.debug:
with open(c) as f:
read_value = f.read().strip()
match = OK if pref == read_value else ERR
print('[D] HWP for cpu{:d} - write "{:s}" - read "{:s}" - match {}'.format(i, pref, read_value, match))
assert pref in ('performance', 'balance-performance', 'default', 'balance-power', 'power')
subprocess.run("x86_energy_perf_policy --all " + pref, shell=True)
print("x86_energy_perf_policy --all " + pref)


def power_thread(config, regs, exit_event):
Expand Down Expand Up @@ -592,7 +583,10 @@ def power_thread(config, regs, exit_event):
performance_mode = cpu_usage > 100.0 / (cpu_count() * 1.25)
# check again if we are on AC, since in the meantime we might have switched to BATTERY
if not is_on_battery(config):
set_hwp('performance' if performance_mode else 'balance_performance')
set_hwp('performance' if performance_mode else 'balance-performance')
elif power['source'] == 'BATTERY' and enable_hwp_mode:
exit_event.wait(wait_t)
set_hwp('balance-power')
else:
exit_event.wait(wait_t)

Expand Down