High CPU utilization (%sys) due to the time spent in avtab_search_node() because of custom SELinux policy.
Issue
- High CPU utilization (%sys) observed in the system
12:00:02 AM CPU %user %nice %system %iowait %steal %idle
12:10:01 AM all 35.32 0.03 48.49 0.02 0.31 15.83
12:20:01 AM all 34.86 0.03 48.66 0.03 0.35 16.07
12:30:02 AM all 34.90 0.03 48.10 0.02 0.31 16.64
12:40:01 AM all 34.94 0.03 48.08 0.03 0.33 16.60
12:50:01 AM all 33.70 0.03 46.76 0.03 0.31 19.17
01:00:01 AM all 34.65 0.03 47.73 0.03 0.32 17.24
01:10:01 AM all 34.79 0.03 47.56 0.03 0.32 17.27
01:20:01 AM all 34.99 0.03 47.96 0.03 0.34 16.65
01:30:02 AM all 35.79 0.03 48.25 0.03 0.34 15.57
01:40:02 AM all 34.06 0.03 48.08 0.02 0.32 17.48
01:50:02 AM all 34.75 0.03 47.55 0.03 0.33 17.32
02:00:01 AM all 34.52 0.03 47.51 0.03 0.32 17.60
02:10:01 AM all 34.92 0.03 47.38 0.03 0.35 17.29
02:20:01 AM all 34.71 0.03 46.94 0.02 0.32 17.98
02:30:01 AM all 46.28 0.03 45.20 0.17 0.90 7.42
02:40:01 AM all 38.95 0.03 47.90 0.02 0.34 12.76
02:50:01 AM all 34.80 0.03 47.56 0.03 0.31 17.29
03:00:01 AM all 34.79 0.03 47.20 0.03 0.31 17.64
03:10:01 AM all 32.92 0.03 48.12 0.03 0.30 18.61
03:20:01 AM all 34.76 0.09 47.05 0.08 0.34 17.68
03:30:01 AM all 33.05 0.02 41.90 0.03 0.28 24.73
Average: all 35.34 0.03 47.33 0.04 0.35 16.90
Environment
- Red Hat Enterprise Linux 7.9
- Custom SELinux policy
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