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SubjectRe: [PATCH] Documentation: add descs for guest fields in stat procfs files
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Le mardi 24 juin 2008 à 22:43 +1000, AP a écrit :
> Git patch 5e84cfde51cf303d368fcb48f22059f37b3872de introduced a new
> field to /proc/stat that represents guest (virtual cpu) time.
>
> Git patch 9ac52315d4cf5f561f36dabaf0720c00d3553162 introduced the same
> to /proc/<pid>/stat along with a guest time of the tasks children.
>
> The patch below adds descriptions of these fields to the procfs
> documentation included in the kernel.
>
> Signed-Off-By: Andrew P <ap@zip.com.au>

It looks good to me.

Laurent

> diff -aur linux-2.6.26-rc7-git2.orig/Documentation/filesystems/proc.txt linux-2.6.26-rc7-git2/Documentation/filesystems/proc.txt
> --- linux-2.6.26-rc7-git2.orig/Documentation/filesystems/proc.txt 2008-06-23 22:27:13.000000000 +1000
> +++ linux-2.6.26-rc7-git2/Documentation/filesystems/proc.txt 2008-06-24 22:16:53.000000000 +1000
> @@ -210,9 +210,9 @@
> cmin_flt number of minor faults with child's
> maj_flt number of major faults
> cmaj_flt number of major faults with child's
> - utime user mode jiffies
> + utime user mode jiffies (including gtime below*)
> stime kernel mode jiffies
> - cutime user mode jiffies with child's
> + cutime user mode jiffies with child's (including cgtime below*)
> cstime kernel mode jiffies with child's
> priority priority level
> nice nice level
> @@ -239,6 +239,11 @@
> rt_priority realtime priority
> policy scheduling policy (man sched_setscheduler)
> blkio_ticks time spent waiting for block IO
> + gtime guest (virtual CPU) CPU time in jiffies
> + cgtime guests' children's CPU time in jiffies
> +
> +* gtime and cgtime are included in these values so that applications that are
> + not aware of these fields do not lose time in their calculations.
> ..............................................................................
>
>
> @@ -828,9 +833,9 @@
> since the system first booted. For a quick look, simply cat the file:
>
> > cat /proc/stat
> - cpu 2255 34 2290 22625563 6290 127 456 0
> - cpu0 1132 34 1441 11311718 3675 127 438 0
> - cpu1 1123 0 849 11313845 2614 0 18 0
> + cpu 2255 34 2290 22625563 6290 127 456 0 0
> + cpu0 1132 34 1441 11311718 3675 127 438 0 0
> + cpu1 1123 0 849 11313845 2614 0 18 0 0
> intr 114930548 113199788 3 0 5 263 0 4 [... lots more numbers ...]
> ctxt 1990473
> btime 1062191376
> @@ -843,7 +848,8 @@
> different kinds of work. Time units are in USER_HZ (typically hundredths of a
> second). The meanings of the columns are as follows, from left to right:
>
> -- user: normal processes executing in user mode
> +- user: normal processes executing in user mode (includes guest time below so
> + that guest-unaware applications do not lose time)
> - nice: niced processes executing in user mode
> - system: processes executing in kernel mode
> - idle: twiddling thumbs
> @@ -851,6 +857,7 @@
> - irq: servicing interrupts
> - softirq: servicing softirqs
> - steal: involuntary wait
> +- guest: time used to run a virtual CPU
>
> The "intr" line gives counts of interrupts serviced since boot time, for each
> of the possible system interrupts. The first column is the total of all
>
--
------------- Laurent.Vivier@bull.net ---------------
"The best way to predict the future is to invent it."
- Alan Kay
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