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Oracle OL: How To Add Timestamps To dmesg Kernel Boot Log (Doc ID 2070905.1)

Last updated on AUGUST 04, 2018

Applies to:

Linux OS - Version Oracle Linux 4.4 and later
Oracle VM - Version 3.0.1 and later
Linux x86-64


 During problem analysis or day-to-day operation, it is sometimes difficult to determine what exactly slows the system, especially during the boot process.  One contributor to this difficulty is output of the following command:

 # dmesg
NET: Registered protocol family 10
ip6_tables: (C) 2000-2006 Netfilter Core Team
nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
ip_tables: (C) 2000-2006 Netfilter Core Team
type=1305 audit(1445931490.439:4): audit_pid=1333 old=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:auditd_t:s0 res=1
SELinux: initialized (dev autofs, type autofs), uses genfs_contexts
SELinux: initialized (dev autofs, type autofs), uses genfs_contexts

The kernel ring buffer is displayed but is not timestamped.  No information about the relative times of each entry is output.


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