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| author | Paul Eggert <eggert@cs.ucla.edu> | 2005-09-09 20:50:51 +0000 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2005-09-09 20:50:51 +0000 |
| commit | 263672792f546ea88f0fe744bdbf75aec5280175 (patch) | |
| tree | 86566e5d9e51c7ceda09f8e306684792c5bf3247 /doc | |
| parent | 3de440458dc025ccc0a999fe8fc7ceb526470407 (diff) | |
| download | coreutils-263672792f546ea88f0fe744bdbf75aec5280175.tar.xz | |
(nice invocation): Document "niceness" versus
"nice value" versus "scheduling priority".
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/coreutils.texi | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/doc/coreutils.texi b/doc/coreutils.texi index 32b6977a6..17d6e2887 100644 --- a/doc/coreutils.texi +++ b/doc/coreutils.texi @@ -12517,6 +12517,16 @@ enforce more restrictive limits. An attempt to set the niceness outside the supported range is treated as an attempt to use the minimum or maximum supported value. +A niceness should not be confused with a scheduling priority, which +lets applications determine the order in which threads are scheduled +to run. Unlike a priority, a niceness is merely advice to the +scheduler, which the scheduler is free to ignore. Also, as a point of +terminology, @acronym{POSIX} defines the behavior of @command{nice} in +terms of a @dfn{nice value}, which is the nonnegative difference +between a niceness and the minimum niceness. Though @command{nice} +conforms to @command{POSIX}, its documentation and diagnostics use the +term ``niceness'' for compatibility with historical practice. + @var{command} must not be a special built-in utility (@pxref{Special built-in utilities}). |