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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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