[src/trunk]: src/share/man/man7 Document kern.hist

[pgoyette <pgoyette%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a6867d2ebb38
branches:  trunk
changeset: 820151:a6867d2ebb38
user:      pgoyette <pgoyette%NetBSD.org@localhost>
date:      Sun Jan 01 23:59:19 2017 +0000

description:
Document kern.hist

diffstat:

 share/man/man7/sysctl.7 |  23 ++++++++++++++++++++++-
 1 files changed, 22 insertions(+), 1 deletions(-)

diffs (37 lines):

diff -r 5203cf16e32f -r a6867d2ebb38 share/man/man7/sysctl.7
--- a/share/man/man7/sysctl.7   Sun Jan 01 23:58:47 2017 +0000
+++ b/share/man/man7/sysctl.7   Sun Jan 01 23:59:19 2017 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: sysctl.7,v 1.104 2016/11/17 01:22:00 pgoyette Exp $
+.\"    $NetBSD: sysctl.7,v 1.105 2017/01/01 23:59:19 pgoyette Exp $
 .\"
 .\" Copyright (c) 1993
 .\"    The Regents of the University of California.  All rights reserved.
@@ -547,6 +547,27 @@
 Returns the number of
 .Xr hardclock 9
 ticks.
+.It Li kern.hist
+This variable contains kernel history data if the kernel was
+configured for any of the options
+.Dv UVHMIST ,
+.Dv USB_DEBUG ,
+.Dv BIOHIST ,
+or
+.Dv SCDEBUG .
+(See
+.Xr options 4
+for more details.)
+The third-level names correspond to each available history table.
+The values of the history tables are in an internal format, and can be
+decoded by the
+.Xr vmstat 1
+utility's
+.Dv -U
+and
+.Dv u
+options;
+the -l option can be used to see which tables are available.
 .It Li kern.hostid ( Dv KERN_HOSTID )
 Get or set the host identifier.
 This is aimed to replace the legacy