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authorDavid Brown <davidb@codeaurora.org>2011-03-17 08:13:16 +0300
committerDavid Brown <davidb@codeaurora.org>2011-03-17 08:13:16 +0300
commit92c260f755c42337c550d8ac1f8ccd1b32bffb20 (patch)
tree6d04fefc1adeecabfb2b00c201e0db78fa2b5529 /Documentation/scheduler/sched-stats.txt
parent8e76a80960bf06c245160a484d5a363ca6b520bb (diff)
parent05e34754518b6a90d5c392790c032575fab12d66 (diff)
downloadlinux-92c260f755c42337c550d8ac1f8ccd1b32bffb20.tar.xz
Merge remote branch 'rmk/for-linus' into for-linus
* rmk/for-linus: (1557 commits) ARM: 6806/1: irq: introduce entry and exit functions for chained handlers ARM: 6781/1: Thumb-2: Work around buggy Thumb-2 short branch relocations in gas ARM: 6747/1: P2V: Thumb2 support ARM: 6798/1: aout-core: zero thread debug registers in a.out core dump ARM: 6796/1: Footbridge: Fix I/O mappings for NOMMU mode ARM: 6784/1: errata: no automatic Store Buffer drain on Cortex-A9 ARM: 6772/1: errata: possible fault MMU translations following an ASID switch ARM: 6776/1: mach-ux500: activate fix for errata 753970 ARM: 6794/1: SPEAr: Append UL to device address macros. ARM: 6793/1: SPEAr: Remove unused *_SIZE macros from spear*.h files ARM: 6792/1: SPEAr: Replace SIZE macro's with SZ_4K macros ARM: 6791/1: SPEAr3xx: Declare device structures after shirq code ARM: 6790/1: SPEAr: Clock Framework: Rename usbd clock and align apb_clk entry ARM: 6789/1: SPEAr3xx: Rename sdio to sdhci ARM: 6788/1: SPEAr: Include mach/hardware.h instead of mach/spear.h ARM: 6787/1: SPEAr: Reorder #includes in .h & .c files. ARM: 6681/1: SPEAr: add debugfs support to clk API ARM: 6703/1: SPEAr: update clk API support ARM: 6679/1: SPEAr: make clk API functions more generic ARM: 6737/1: SPEAr: formalized timer support ... Conflicts: arch/arm/mach-msm/board-msm7x27.c arch/arm/mach-msm/board-msm7x30.c arch/arm/mach-msm/board-qsd8x50.c arch/arm/mach-msm/board-sapphire.c arch/arm/mach-msm/include/mach/memory.h
Diffstat (limited to 'Documentation/scheduler/sched-stats.txt')
-rw-r--r--Documentation/scheduler/sched-stats.txt33
1 files changed, 15 insertions, 18 deletions
diff --git a/Documentation/scheduler/sched-stats.txt b/Documentation/scheduler/sched-stats.txt
index 01e69404ee5e..1cd5d51bc761 100644
--- a/Documentation/scheduler/sched-stats.txt
+++ b/Documentation/scheduler/sched-stats.txt
@@ -1,3 +1,7 @@
+Version 15 of schedstats dropped counters for some sched_yield:
+yld_exp_empty, yld_act_empty and yld_both_empty. Otherwise, it is
+identical to version 14.
+
Version 14 of schedstats includes support for sched_domains, which hit the
mainline kernel in 2.6.20 although it is identical to the stats from version
12 which was in the kernel from 2.6.13-2.6.19 (version 13 never saw a kernel
@@ -28,32 +32,25 @@ to write their own scripts, the fields are described here.
CPU statistics
--------------
-cpu<N> 1 2 3 4 5 6 7 8 9 10 11 12
-
-NOTE: In the sched_yield() statistics, the active queue is considered empty
- if it has only one process in it, since obviously the process calling
- sched_yield() is that process.
+cpu<N> 1 2 3 4 5 6 7 8 9
-First four fields are sched_yield() statistics:
- 1) # of times both the active and the expired queue were empty
- 2) # of times just the active queue was empty
- 3) # of times just the expired queue was empty
- 4) # of times sched_yield() was called
+First field is a sched_yield() statistic:
+ 1) # of times sched_yield() was called
Next three are schedule() statistics:
- 5) # of times we switched to the expired queue and reused it
- 6) # of times schedule() was called
- 7) # of times schedule() left the processor idle
+ 2) # of times we switched to the expired queue and reused it
+ 3) # of times schedule() was called
+ 4) # of times schedule() left the processor idle
Next two are try_to_wake_up() statistics:
- 8) # of times try_to_wake_up() was called
- 9) # of times try_to_wake_up() was called to wake up the local cpu
+ 5) # of times try_to_wake_up() was called
+ 6) # of times try_to_wake_up() was called to wake up the local cpu
Next three are statistics describing scheduling latency:
- 10) sum of all time spent running by tasks on this processor (in jiffies)
- 11) sum of all time spent waiting to run by tasks on this processor (in
+ 7) sum of all time spent running by tasks on this processor (in jiffies)
+ 8) sum of all time spent waiting to run by tasks on this processor (in
jiffies)
- 12) # of timeslices run on this cpu
+ 9) # of timeslices run on this cpu
Domain statistics