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Diffstat (limited to 'Documentation/accounting/delay-accounting.rst')
| -rw-r--r-- | Documentation/accounting/delay-accounting.rst | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/accounting/delay-accounting.rst b/Documentation/accounting/delay-accounting.rst index 197fe319cbec..241d1a87f2cd 100644 --- a/Documentation/accounting/delay-accounting.rst +++ b/Documentation/accounting/delay-accounting.rst @@ -15,6 +15,7 @@ c) swapping in pages d) memory reclaim e) thrashing page cache f) direct compact +g) write-protect copy and makes these statistics available to userspace through the taskstats interface. @@ -48,7 +49,7 @@ this structure. See for a description of the fields pertaining to delay accounting. It will generally be in the form of counters returning the cumulative delay seen for cpu, sync block I/O, swapin, memory reclaim, thrash page -cache, direct compact etc. +cache, direct compact, write-protect copy etc. Taking the difference of two successive readings of a given counter (say cpu_delay_total) for a task will give the delay @@ -117,6 +118,8 @@ Get sum of delays, since system boot, for all pids with tgid 5:: 0 0 0ms COMPACT count delay total delay average 0 0 0ms + WPCOPY count delay total delay average + 0 0 0ms Get IO accounting for pid 1, it works only with -p:: |