linux-kernel - Re: [PATCH] docs/zh_CN: Update zh_CN/accounting/delay-accounting.rst

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Date:   Thu, 13 Jan 2022 10:11:09 +0800
From:   teng sterling <sterlingteng@...il.com>
To:     yongw.pur@...il.com
Cc:     Alex Shi <alexs@...nel.org>, Yanteng Si <siyanteng@...ngson.cn>,
        Jonathan Corbet <corbet@....net>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        linux-kernel@...r.kernel.org, wang.yong12@....com.cn,
        yang.yang29@....com.cn
Subject: Re: [PATCH] docs/zh_CN: Update zh_CN/accounting/delay-accounting.rst

Hi Yong,
<yongw.pur@...il.com> 于2022年1月13日周四 07:27写道：
>
> From: wangyong <wang.yong12@....com.cn>
>
> Update zh_CN/accounting/delay-accounting.rst.
> The document modification has been merged which refers to the following link:
> https://lore.kernel.org/all/1639583021-92977-1-git-send-email-wang.yong12@zte.com.cn/
The normal way to handle this is to add an appropriate Fixes tag.

By the way, this patch should be submitted together as part of that
patch series where you modified the original documentation. Also check
out the documentation for other languages and send it in the same way.
If you get stuck, simply --CC the maintainer is an elegant way to
handle it. >_<


>
> Signed-off-by: wangyong <wang.yong12@....com.cn>
> Reviewed-by: Yang Yang <yang.yang29@....com.cn>
This looks like the first version of the patch and doesn't seem to
have been reviewed by anyone yet, so you can't sign it instead of
someone else.

Thanks,
Yanteng
> ---
>  .../zh_CN/accounting/delay-accounting.rst          | 62 +++++++++++-----------
>  1 file changed, 30 insertions(+), 32 deletions(-)
>
> diff --git a/Documentation/translations/zh_CN/accounting/delay-accounting.rst b/Documentation/translations/zh_CN/accounting/delay-accounting.rst
> index 67d5606..f184941 100644
> --- a/Documentation/translations/zh_CN/accounting/delay-accounting.rst
> +++ b/Documentation/translations/zh_CN/accounting/delay-accounting.rst
> @@ -17,6 +17,8 @@ a) 等待一个CPU（任务为可运行）
>  b) 完成由该任务发起的块I/O同步请求
>  c) 页面交换
>  d) 内存回收
> +e) 页缓存抖动
> +f) 直接规整
>
>  并将这些统计信息通过taskstats接口提供给用户空间。
>
> @@ -37,10 +39,10 @@ d) 内存回收
>  向用户态返回一个通用数据结构，对应每pid或每tgid的统计信息。延时计数功能填写
>  该数据结构的特定字段。见
>
> -     include/linux/taskstats.h
> +     include/uapi/linux/taskstats.h
>
>  其描述了延时计数相关字段。系统通常以计数器形式返回 CPU、同步块 I/O、交换、内存
> -回收等的累积延时。
> +回收、页缓存抖动、直接规整等的累积延时。
>
>  取任务某计数器两个连续读数的差值，将得到任务在该时间间隔内等待对应资源的总延时。
>
> @@ -72,40 +74,36 @@ kernel.task_delayacct进行开关。注意，只有在启用延时计数后启
>
>  getdelays命令的一般格式::
>
> -       getdelays [-t tgid] [-p pid] [-c cmd...]
> +       getdelays [-dilv] [-t tgid] [-p pid]
>
>  获取pid为10的任务从系统启动后的延时信息::
>
> -       # ./getdelays -p 10
> +       # ./getdelays -d -p 10
>         （输出信息和下例相似）
>
>  获取所有tgid为5的任务从系统启动后的总延时信息::
>
> -       # ./getdelays -t 5
> -
> -
> -       CPU     count   real total      virtual total   delay total
> -               7876    92005750        100000000       24001500
> -       IO      count   delay total
> -               0       0
> -       SWAP    count   delay total
> -               0       0
> -       RECLAIM count   delay total
> -               0       0
> -
> -获取指定简单命令运行时的延时信息::
> -
> -  # ./getdelays -c ls /
> -
> -  bin   data1  data3  data5  dev  home  media  opt   root  srv        sys  usr
> -  boot  data2  data4  data6  etc  lib   mnt    proc  sbin  subdomain  tmp  var
> -
> -
> -  CPU  count   real total      virtual total   delay total
> -       6       4000250         4000000         0
> -  IO   count   delay total
> -       0       0
> -  SWAP count   delay total
> -       0       0
> -  RECLAIM      count   delay total
> -       0       0
> +       # ./getdelays -d -t 5
> +       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              0ms
> +       SWAP            count    delay total  delay average
> +                           0              0              0ms
> +       RECLAIM         count    delay total  delay average
> +                           0              0              0ms
> +       THRASHING       count    delay total  delay average
> +                           0              0              0ms
> +       COMPACT         count    delay total  delay average
> +                           0              0              0ms
> +
> +获取pid为1的IO计数，它只和-p一起使用::
> +       # ./getdelays -i -p 1
> +       printing IO accounting
> +       linuxrc: read=65536, write=0, cancelled_write=0
> +
> +上面的命令与-v一起使用，可以获取更多调试信息。
> --
> 2.7.4
>