Commit f5bb4ee0 authored by Tomáš Peterka's avatar Tomáš Peterka Committed by Rafael Monnerat

[format] Switch exclusive CPU to 'realtime' performant mode

parent 02b9607e
......@@ -263,7 +263,7 @@ class CGroupManager(Manager):
short_name = 'cgroup'
cpu_exclusive_file = ".slapos-cpu-exclusive"
cpuset_path = "/sys/fs/cgroup/cpuset/"
task_write_mode = "at"
task_write_mode = "wt"
def __init__(self, computer):
"""Extract necessary information from the ``computer``.
......@@ -403,10 +403,27 @@ class CGroupManager(Manager):
return self._move_task(pid, exclusive_cpu)[1]
return -1
def _move_task(self, pid, cpu_id):
"""Move ``pid`` to ``cpu_id``."""
def _move_task(self, pid, cpu_id, cpu_mode="performance"):
"""Move ``pid`` to ``cpu_id``.
cpu_mode can be "performance" or "powersave"
known_cpu_mode_list = ("performance", "powersave")
with open(os.path.join(self.cpuset_path, "cpu" + str(cpu_id), "tasks"), self.task_write_mode) as fo:
fo.write(str(pid) + "\n")
# set the core to `cpu_mode`
scaling_governor_file = "/sys/devices/system/cpu/cpu{:d}/cpufreq/scaling_governor".format(cpu_id)
if os.path.exists(scaling_governor_file):
if cpu_mode not in known_cpu_mode_list:
logger.warning("Cannot set CPU to mode \"{}\"! Known modes {!s}".format(
cpu_mode, known_cpu_mode_list))
with open(scaling_governor_file, self.task_write_mode) as fo:
fo.write(cpu_mode + "\n") # default is "powersave"
except IOError as e:
# handle permission error
logger.error("Failed to write \"{}\" to {}".format(cpu_mode, scaling_governor_file))
return pid, cpu_id
def _prepare_folder(self, folder):
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