| Ved-vampir | 602a517 | 2015-03-16 15:22:36 +0300 | [diff] [blame] | 1 | import time |
| 2 | |
| 3 | from discover import provides |
| 4 | from utils import SensorInfo, is_dev_accepted |
| 5 | |
| 6 | # 0 - cpu name |
| 7 | # 1 - user: normal processes executing in user mode |
| 8 | # 2 - nice: niced processes executing in user mode |
| 9 | # 3 - system: processes executing in kernel mode |
| 10 | # 4 - idle: twiddling thumbs |
| 11 | # 5 - iowait: waiting for I/O to complete |
| 12 | # 6 - irq: servicing interrupts |
| 13 | # 7 - softirq: servicing softirqs |
| 14 | |
| 15 | io_values_pos = [ |
| 16 | (1, 'user_processes', False), |
| 17 | (2, 'nice_processes', False), |
| 18 | (3, 'system_processes', False), |
| 19 | (4, 'idle_time', True), |
| 20 | ] |
| 21 | |
| 22 | |
| 23 | @provides("system-cpu") |
| 24 | def syscpu_stat(disallowed_prefixes=('intr', 'ctxt', 'btime', 'processes', |
| 25 | 'procs_running', 'procs_blocked', 'softirq'), |
| 26 | allowed_prefixes=None): |
| 27 | results = {} |
| 28 | usage_sum = {} |
| 29 | usage_with_idle = {} |
| 30 | for line in open('/proc/stat'): |
| 31 | vals = line.split() |
| 32 | dev_name = vals[0] |
| 33 | |
| 34 | dev_ok = is_dev_accepted(dev_name, |
| 35 | disallowed_prefixes, |
| 36 | allowed_prefixes) |
| 37 | |
| 38 | if dev_ok: |
| 39 | usage_sum[dev_name] = float(int(vals[1]) + int(vals[2]) + int(vals[3])) |
| 40 | usage_with_idle[dev_name] = usage_sum[dev_name] + int(vals[4]) |
| 41 | # wait for average CPU utilization calc |
| 42 | time.sleep(1) |
| 43 | |
| 44 | for line in open('/proc/stat'): |
| 45 | vals = line.split() |
| 46 | dev_name = vals[0] |
| 47 | |
| 48 | dev_ok = is_dev_accepted(dev_name, |
| 49 | disallowed_prefixes, |
| 50 | allowed_prefixes) |
| 51 | |
| 52 | if dev_ok: |
| 53 | for pos, name, accum_val in io_values_pos: |
| 54 | sensor_name = "{0}.{1}".format(dev_name, name) |
| 55 | results[sensor_name] = SensorInfo(int(vals[pos]), accum_val) |
| 56 | # utilization calc |
| 57 | sensor_name = "{0}.{1}".format(dev_name, "usage_percent") |
| 58 | |
| 59 | usage_sum_last = float(int(vals[1]) + int(vals[2]) + int(vals[3])) |
| 60 | usage_with_idle_last = usage_sum_last + int(vals[4]) |
| 61 | proc = usage_sum_last - usage_sum[dev_name] |
| 62 | idle = usage_with_idle_last - usage_with_idle[dev_name] |
| 63 | usage = proc / idle |
| 64 | |
| 65 | results[sensor_name] = SensorInfo(usage*100, False) |
| 66 | return results |
| 67 | |