From 2701b511e491f95d829a340c2540d602db5c63d8 Mon Sep 17 00:00:00 2001 From: wangyong Date: Wed, 12 Jan 2022 08:04:42 -0800 Subject: docs/zh_CN: Update zh_CN/accounting/delay-accounting.rst 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/ Signed-off-by: wangyong Reviewed-by: Yang Yang Reviewed-by: Alex Shi Link: https://lore.kernel.org/r/1642003482-48935-1-git-send-email-wang.yong12@zte.com.cn Signed-off-by: Jonathan Corbet --- .../zh_CN/accounting/delay-accounting.rst | 62 +++++++++++----------- 1 file changed, 30 insertions(+), 32 deletions(-) (limited to 'Documentation/translations/zh_CN/accounting') diff --git a/Documentation/translations/zh_CN/accounting/delay-accounting.rst b/Documentation/translations/zh_CN/accounting/delay-accounting.rst index 67d5606e5401..f1849411018e 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。 -- cgit v1.2.3