The patch titled
Subject: delayacct: update docs and fix some spelling errors
has been added to the -mm mm-nonmm-unstable branch. Its filename is
delayacct-add-delay-max-to-record-delay-peak-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/delayacct-add-delay-max-to-record-delay-peak-fix.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
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------------------------------------------------------
From: Yaxin Wang <wang.yaxin@xxxxxxxxxx>
Subject: delayacct: update docs and fix some spelling errors
Date: Fri, 13 Dec 2024 19:27:00 +0800 (CST)
Update delay-accounting.rst to include the 'delay max' in the output of
getdelays, and fix some spelling errors before.
Link: https://lkml.kernel.org/r/20241213192700771XKZ8H30OtHSeziGqRVMs0@xxxxxxxxxx
Signed-off-by: Yaxin Wang <wang.yaxin@xxxxxxxxxx>
Signed-off-by: Jiang Kun <jiang.kun2@xxxxxxxxxx>
Cc: Balbir Singh <bsingharora@xxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Fan Yu <fan.yu9@xxxxxxxxxx>
Cc: Peilin He <he.peilin@xxxxxxxxxx>
Cc: tuqiang <tu.qiang35@xxxxxxxxxx>
Cc: Wang Yong <wang.yong12@xxxxxxxxxx>
Cc: xu xin <xu.xin16@xxxxxxxxxx>
Cc: ye xingchen <ye.xingchen@xxxxxxxxxx>
Cc: Yunkai Zhang <zhang.yunkai@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/accounting/delay-accounting.rst | 38 ++++++++--------
kernel/delayacct.c | 2
2 files changed, 20 insertions(+), 20 deletions(-)
--- a/Documentation/accounting/delay-accounting.rst~delayacct-add-delay-max-to-record-delay-peak-fix
+++ a/Documentation/accounting/delay-accounting.rst
@@ -100,29 +100,29 @@ Get delays, since system boot, for pid 1
# ./getdelays -d -p 10
(output similar to next case)
-Get sum of delays, since system boot, for all pids with tgid 5::
+Get sum and peak of delays, since system boot, for all pids with tgid 242::
- # ./getdelays -d -t 5
+ bash-4.4# ./getdelays -d -t 242
print delayacct stats ON
- TGID 5
+ TGID 242
- CPU count real total virtual total delay total delay average
- 8 7000000 6872122 3382277 0.423ms
- IO count delay total delay average
- 0 0 0.000ms
- SWAP count delay total delay average
- 0 0 0.000ms
- RECLAIM count delay total delay average
- 0 0 0.000ms
- THRASHING count delay total delay average
- 0 0 0.000ms
- COMPACT count delay total delay average
- 0 0 0.000ms
- WPCOPY count delay total delay average
- 0 0 0.000ms
- IRQ count delay total delay average
- 0 0 0.000ms
+ CPU count real total virtual total delay total delay average delay max
+ 239 296000000 307724885 1127792 0.005ms 0.238382ms
+ IO count delay total delay average delay max
+ 0 0 0.000ms 0.000000ms
+ SWAP count delay total delay average delay max
+ 0 0 0.000ms 0.000000ms
+ RECLAIM count delay total delay average delay max
+ 0 0 0.000ms 0.000000ms
+ THRASHING count delay total delay average delay max
+ 0 0 0.000ms 0.000000ms
+ COMPACT count delay total delay average delay max
+ 0 0 0.000ms 0.000000ms
+ WPCOPY count delay total delay average delay max
+ 230 19100476 0.083ms 0.383822ms
+ IRQ count delay total delay average delay max
+ 0 0 0.000ms 0.000000ms
Get IO accounting for pid 1, it works only with -p::
--- a/kernel/delayacct.c~delayacct-add-delay-max-to-record-delay-peak-fix
+++ a/kernel/delayacct.c
@@ -93,7 +93,7 @@ void __delayacct_tsk_init(struct task_st
/*
* Finish delay accounting for a statistic using its timestamps (@start),
- * accumalator (@total) and @count
+ * accumulator (@total) and @count
*/
static void delayacct_end(raw_spinlock_t *lock, u64 *start, u64 *total, u32 *count, u64 *max)
{
_
Patches currently in -mm which might be from wang.yaxin@xxxxxxxxxx are
delayacct-add-delay-max-to-record-delay-peak.patch
delayacct-add-delay-max-to-record-delay-peak-fix.patch
