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proc.5: Reorganize text describing /proc/stat "cpu" fields 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2012-12-26 20:36:20 +01:00
parent aa610245c8
commit ae3b804737
1 changed files with 32 additions and 21 deletions
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53
man5/proc.5
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@ -58,7 +58,7 @@
.\" to see what information could be imported from that file
.\" into this file.
.\"
.TH PROC 5 2012-12-22 "Linux" "Linux Programmer's Manual"
.TH PROC 5 2012-12-27 "Linux" "Linux Programmer's Manual"
.SH NAME
proc \- process information pseudo-file system
.SH DESCRIPTION
@ -2049,32 +2049,43 @@ USER_HZ (1/100ths of a second on most architectures, use
.IR sysconf(_SC_CLK_TCK)
to obtain the right value),
.\" 1024 on Alpha and ia64
that the system spent in user mode,
user mode with low priority (nice), system mode, and the
idle task, respectively.
that the system spent in various states:
.RS
.TP
.I user
Time spent in user mode.
.TP
.I nice
Time spent in user mode with low priority (nice)
.TP
.I system
Time spent in system mode
.TP
.I idle
Time spent in the idle task.
.\" FIXME Actually, the following info about the /proc/stat 'cpu' field
.\" does not seem to be quite right (at least in 2.6.12)
The last value should be USER_HZ times the
This value should be USER_HZ times the
second entry in the uptime pseudo-file.
In Linux 2.6 this line includes three additional columns:
.I iowait
\- time waiting for I/O to complete (since 2.5.41);
.I irq
\- time servicing interrupts (since 2.6.0-test4);
.I softirq
\- time servicing softirqs (since 2.6.0-test4).
Since Linux 2.6.11, there is an eighth column,
.I steal
\- stolen time, which is the time spent in other operating systems when
.TP
.IR iowait " (since Linux 2.5.41)"
Time waiting for I/O to complete.
.TP
.IR irq " (since Linux 2.6.0-test4)"
Time servicing interrupts.
.TP
.I softirq " (since Linux 2.6.0-test4)"
Time servicing softirqs.
.TP
.IR steal " (since Linux 2.6.11)"
Stolen time, which is the time spent in other operating systems when
running in a virtualized environment
Since Linux 2.6.24, there is a ninth column,
.IR guest ,
which is the time spent running a virtual CPU for guest
.TP
.IR guest " (since Linux 2.6.24)"
The time spent running a virtual CPU for guest
operating systems under the control of the Linux kernel.
.\" See Changelog entry for 5e84cfde51cf303d368fcb48f22059f37b3872de
.RE
.TP
\fIpage 5741 1808\fP
The number of pages the system paged in and the number that were paged