Often we encounter some problems, the process of writing files, writing is very slow, and the total number of Io (BI,BO) is very low, but the Vmstat display iowait is very high, is the following figure in the WA option.Iowait_oenhan
The man Vmstat Manual is explained as follows:
Wa:time spent waiting for IO. Prior to Linux 2.5.41, included in idle.CPU time spent on the IO wait, that is, the process of IO by the CPU dispatched, and did not perform immediately, resulting in an extension o
work, weight;/* If SOFTIRQ window was exhuasted then punt. * Allow this to run for 2 Jiff IES since which would allow * an average latency of 1.5/hz. */if (Unlikely (Budget By the visible, the main work of the lower half is to traverse the list of devices that have data frames waiting to be received, and for each device, execute its corresponding poll function.For non-NAPI devices, the poll function is initialized to Process_backlog () in the Net_dev
released. Even so, users can at least use their powerful features to easily save expensive hardware upgrades.Zend founder Jiff Sulaski (Zeev Suraski) recently interviewed the media about the Zend Server Community Edition and its non-free version, and why the team spent so much time developing PHP 6.Reporter: Zend server and the existing Zend platform software similarities and differences?Sulaski: At the beginning, we plan to run the two products at t
corresponds to the number of times a specific interruption has occurred since the system was started."Ctxt" indicates the number of times the CPU context has been exchanged since the system was started."Btime" indicates the time (in seconds) that has elapsed since the system was started.The number of tasks created since the system started "processes (total_forks."Procs_running": number of tasks in the current queue."Procs_blocked": Number of blocked tasks.
The following two methods can be used
main function of the bluetooth module, it is mainly used to obtain the system time to determine whether the task in the task list has a scheduled task time, and needs to be scheduled. There are about 70 tasks in this task list, and the current time will be updated by calling the gettimeofday system before each task is judged cyclically. By reading the gettimeofday system call in the kernel, we found that in our system, the benchmark is based on the system's
Scitex Continuous Tone TGA Truevision Targa tif Tagged Image file format wmf Windows Meta File WPG wordpefect Bitmap . ACA the role document used by the Microsoft Agent System Management Configuration . ACM Audio Compression Management driver for Windows system to provide a variety of voice format encoding and decoding functions . ACS and ACM, but kept in local . ADE Microsoft Access Project Extensions . ADN a blank project template for Microsoft access . ADP . Ac
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