diff options
Diffstat (limited to 'share/man/man9/hz.9')
| -rw-r--r-- | share/man/man9/hz.9 | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/share/man/man9/hz.9 b/share/man/man9/hz.9 index 8da7c556169..0bf15d706e4 100644 --- a/share/man/man9/hz.9 +++ b/share/man/man9/hz.9 @@ -1,4 +1,4 @@ -.\" $OpenBSD: hz.9,v 1.2 1999/09/10 05:00:48 tholo Exp $ +.\" $OpenBSD: hz.9,v 1.3 2000/10/12 18:05:59 aaron Exp $ .\" .\" Copyright (c) 1999 Marc Espie .\" All rights reserved. @@ -37,7 +37,7 @@ .Nm tick , .Nm tickadj , .Nm stathz , -.Nm profhz +.Nm profhz .Nd system time model. .Sh SYNOPSIS .Va extern int hz; @@ -58,13 +58,13 @@ frequency, and are used to keep track of real time. .Pp On systems where another independent clock is available, it is set at .Va stathz -frequency, and used to gather timing statistics. Ideally, it would be -better to drive +frequency, and used to gather timing statistics. +Ideally, it would be better to drive .Va stathz with a slightly randomized clock, that is still a fixed number on average, -as this would prevent malicious processes from working around the -scheduler. If a separate clock is not available, -.Va stathz +as this would prevent malicious processes from working around the scheduler. +If a separate clock is not available, +.Va stathz is set to .Va hz . .Pp @@ -76,15 +76,15 @@ which must be a multiple of .Va stathz . This will give higher resolution profiling information. .Pp -Normally, +Normally, .Xr hardclock 9 increments .Va time -by +by .Va tick each time it is called. -If the system clock has drifted, -.Xr adjtime 2 +If the system clock has drifted, +.Xr adjtime 2 may be used to skew this increment, but by no more than ten times .Va tickadj . |