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Message-ID: <20241213192700771XKZ8H30OtHSeziGqRVMs0@zte.com.cn>
Date: Fri, 13 Dec 2024 19:27:00 +0800 (CST)
From: <jiang.kun2@....com.cn>
To: <bsingharora@...il.com>, <akpm@...ux-foundation.org>, <david@...hat.com>
Cc: <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
<linux-doc@...r.kernel.org>, <wang.yong12@....com.cn>,
<wang.yaxin@....com.cn>, <fan.yu9@....com.cn>, <he.peilin@....com.cn>,
<tu.qiang35@....com.cn>, <qiu.yutan@....com.cn>,
<zhang.yunkai@....com.cn>, <ye.xingchen@....com.cn>,
<xu.xin16@....com.cn>
Subject: [PATCH linux next] delayacct: update docs and fix some spelling errors
From: Yaxin Wang <wang.yaxin@....com.cn>
Update delay-accounting.rst to include the 'delay max' in the output
of getdelays, and fix some spelling errors before.
Signed-off-by: Yaxin Wang <wang.yaxin@....com.cn>
Signed-off-by: Jiang Kun <jiang.kun2@....com.cn>
---
Some fixes according to:
https://lore.kernel.org/all/20241203170816.3fe81941fe1866ca1672eba8@linux-foundation.org/
1.fix some spelling errors
2.update Documentation/accounting/delay-accounting.rst
Documentation/accounting/delay-accounting.rst | 42 +++++++++----------
kernel/delayacct.c | 2 +-
2 files changed, 22 insertions(+), 22 deletions(-)
diff --git a/Documentation/accounting/delay-accounting.rst b/Documentation/accounting/delay-accounting.rst
index f61c01fc376e..8a0277428ccf 100644
--- a/Documentation/accounting/delay-accounting.rst
+++ b/Documentation/accounting/delay-accounting.rst
@@ -100,29 +100,29 @@ Get delays, since system boot, for pid 10::
# ./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
-
-
- 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
+ TGID 242
+
+
+ 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::
diff --git a/kernel/delayacct.c b/kernel/delayacct.c
index d64ad2a48b4f..23212a0c88e4 100644
--- a/kernel/delayacct.c
+++ b/kernel/delayacct.c
@@ -93,7 +93,7 @@ void __delayacct_tsk_init(struct task_struct *tsk)
/*
* 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)
{
--
2.25.1
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