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| author | Keika Kobayashi <kobayashi.kk@ncos.nec.co.jp> | 2008-07-25 12:48:54 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-25 21:53:47 +0400 |
| commit | 9b0975a20af1ff2f367e3b6b7c150eb114c6b500 (patch) | |
| tree | ace79e787e000f9061e69cbbf81ff0eaa180e190 /Documentation/accounting/delay-accounting.txt | |
| parent | 016ae219b920c4e606088761d3d6070cdf8ba706 (diff) | |
| download | linux-9b0975a20af1ff2f367e3b6b7c150eb114c6b500.tar.xz | |
per-task-delay-accounting: update document and getdelays.c for memory reclaim
Update document and make getdelays.c show delay accounting for memory reclaim.
For making a distinction between "swapping in pages" and "memory reclaim"
in getdelays.c, MEM is changed to SWAP.
Signed-off-by: Keika Kobayashi <kobayashi.kk@ncos.nec.co.jp>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/accounting/delay-accounting.txt')
| -rw-r--r-- | Documentation/accounting/delay-accounting.txt | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/Documentation/accounting/delay-accounting.txt b/Documentation/accounting/delay-accounting.txt index 1443cd71d263..8a12f0730c94 100644 --- a/Documentation/accounting/delay-accounting.txt +++ b/Documentation/accounting/delay-accounting.txt @@ -11,6 +11,7 @@ the delays experienced by a task while a) waiting for a CPU (while being runnable) b) completion of synchronous block I/O initiated by the task c) swapping in pages +d) memory reclaim and makes these statistics available to userspace through the taskstats interface. @@ -41,7 +42,7 @@ this structure. See include/linux/taskstats.h 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 etc. +delay seen for cpu, sync block I/O, swapin, memory reclaim etc. Taking the difference of two successive readings of a given counter (say cpu_delay_total) for a task will give the delay @@ -94,7 +95,9 @@ CPU count real total virtual total delay total 7876 92005750 100000000 24001500 IO count delay total 0 0 -MEM count delay total +SWAP count delay total + 0 0 +RECLAIM count delay total 0 0 Get delays seen in executing a given simple command @@ -108,5 +111,7 @@ CPU count real total virtual total delay total 6 4000250 4000000 0 IO count delay total 0 0 -MEM count delay total +SWAP count delay total + 0 0 +RECLAIM count delay total 0 0 |