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List:       juniper-nsp
Subject:    [j-nsp] multicore JunOS CPU utilization collection method .. ?
From:       Michael Hare <michael.hare () wisc ! edu>
Date:       2017-12-27 16:14:27
Message-ID: CY4PR06MB2853CCC6692A4EF901800495F9070 () CY4PR06MB2853 ! namprd06 ! prod ! outlook ! com
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A bit of cli sleuthing and googling has left me blank, so before I spend time opening \
a jtac case...

In short, for multicore JunOS (MX 16.1, for example), does anyone have a method for \
retrieving per CPU core usage statistics?  SNMP would be preferred, XML tolerable.

Historically I used 1.3.6.1.4.1.2636.3.1.13.1.8 [jnxOperatingCPU] to retrieve Routing \
Engine CPU usage, but in 16.X it looks like jnxOperatingCPU still only returns a \
single CPU value for the RE.  To be clear, I am specifically interested in the \
following information(user/nice/system/interrupt summarized would be fine), which I \
can only get as far as I know interactively with the 'top' command from the shell

% top

last pid: 38153;  load averages:  0.08,  0.28,  0.36                                  \
up 0+13:45:04  09:38:01 90 processes:  2 running, 87 sleeping, 1 zombie
CPU 0:  2.0% user,  0.4% nice,  4.7% system,  0.4% interrupt, 92.5% idle
CPU 1:  1.2% user,  0.4% nice,  5.9% system,  1.2% interrupt, 91.3% idle
CPU 2:  2.0% user,  0.0% nice,  3.5% system,  0.4% interrupt, 94.1% idle
CPU 3:  0.4% user,  0.0% nice,  3.1% system,  0.4% interrupt, 96.1% idle

Specifically, "show chassis routing-engine" still only displays a system total, not a \
per-core breakdown.

> show chassis routing-engine
Routing Engine status:
  Slot 0:
...
   5 sec CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     0 percent
      Interrupt                  1 percent
      Idle                      99 percent

I do already grab load average, personal experience with runaway processes on \
multicore Cisco DSBU (Catalyst 38xx, for example) makes me want the per core CPU \
details.

-Michael
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