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Update CPU idle tracking for apple hosts #93657

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Feb 6, 2022
Merged

Update CPU idle tracking for apple hosts #93657

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44 changes: 22 additions & 22 deletions src/ci/cpu-usage-over-time.py
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Original file line number Diff line number Diff line change
Expand Up @@ -108,37 +108,37 @@ def idle_since(self, prev):
from ctypes import *
libc = cdll.LoadLibrary('/usr/lib/libc.dylib')

PROESSOR_CPU_LOAD_INFO = c_int(2)
class host_cpu_load_info_data_t(Structure):
_fields_ = [("cpu_ticks", c_uint * 4)]

host_statistics = libc.host_statistics
host_statistics.argtypes = [
c_uint,
c_int,
POINTER(host_cpu_load_info_data_t),
POINTER(c_int)
]
host_statistics.restype = c_int

CPU_STATE_USER = 0
CPU_STATE_SYSTEM = 1
CPU_STATE_IDLE = 2
CPU_STATE_NICE = 3
c_int_p = POINTER(c_int)

class State:
def __init__(self):
num_cpus_u = c_uint(0)
cpu_info = c_int_p()
cpu_info_cnt = c_int(0)
err = libc.host_processor_info(
stats = host_cpu_load_info_data_t()
count = c_int(4) # HOST_CPU_LOAD_INFO_COUNT
err = libc.host_statistics(
libc.mach_host_self(),
PROESSOR_CPU_LOAD_INFO,
byref(num_cpus_u),
byref(cpu_info),
byref(cpu_info_cnt),
c_int(3), # HOST_CPU_LOAD_INFO
byref(stats),
byref(count),
)
assert err == 0
self.user = 0
self.system = 0
self.idle = 0
self.nice = 0
cur = 0
while cur < cpu_info_cnt.value:
self.user += cpu_info[cur + CPU_STATE_USER]
self.system += cpu_info[cur + CPU_STATE_SYSTEM]
self.idle += cpu_info[cur + CPU_STATE_IDLE]
self.nice += cpu_info[cur + CPU_STATE_NICE]
cur += num_cpus_u.value
self.system = stats.cpu_ticks[CPU_STATE_SYSTEM]
self.user = stats.cpu_ticks[CPU_STATE_USER]
self.idle = stats.cpu_ticks[CPU_STATE_IDLE]
self.nice = stats.cpu_ticks[CPU_STATE_NICE]

def idle_since(self, prev):
user = self.user - prev.user
Expand Down