measurement book

Serialization | Iot framework ServerSuperIO tutorial-17. Supports real-time databases and high-concurrency storage of measurement point data. Appendix: Release and version update instructions ., Serversuperio 1. C # Introduction to cross-platform Iot communication framework ServerSuperIO (SSIO) Serialization | Iot framework ServerSuperIO tutorial 1.4 communication modes and mechanisms. Serialization | Iot framework ServerSuperIO tutorial 2. service in

1. First, we need to determine the basic environment of the pressure measurement, mainly server, network, disk.Server CPU frequency and cache size has a large impact on the speed of program execution, in general, the impact of IO-intensive operations cache more, CPU-intensive operation of the main frequency impact more; Server CPU cores have a large impact on multithreaded programs, and for high-level languages, due to the number of CPU cores that can

Measurement of rapid development platform, the construction of the business system, in the hands of customers to use, it is generally necessary to create customer use help documents. Because the measurement rapid development platform is an integrated platform integrating C/S,B/S, it is easy to make use of HTML documents to create business system help documents.Example:---------------------------------------

Previously, the use of swingbench for the performance stress test of Oracle RAC DB was used in the most basic and intuitive graphical mode to meet most requirements.However, in some scenarios, the graphics mode may itself consume too much resources, especially when generating a large amount of test data, it is likely due to the instability of the graphics itself caused by the death of the card or even direct exit, seriously affecting the efficiency and testing experience.In the case of silent mo

maximum iops of the disk can be calculated, that isIops = 1000 MS/(tseek + troatation ),Ignore the data transmission time. Assuming that the average physical tracing time of a disk is 3 ms, and the disk speed is, 10 K, and 15 K rpm, the theoretical maximum iops of the disk is,Iops = 1000/(3 + 60000/7200/2) = 140Iops = 1000/(3 + 60000/10000/2) = 167Iops = 1000/(3 + 60000/15000/2) = 200SSD is an electronic device that avoids the time spent on track finding and rotating traditional disks and great

Android custom control series tutorial-view measurement and LayoutAs mentioned above, when a view interface is drawn on an android screen, it must go through the following phases: measure, layout, and draw, we can see these functions in the view class, and there are several functions in it: onmeasure, onlayout, ondraw. These functions are the ones we need to pay attention to when rewriting the control, let's talk about the functions and functions of t

In a cc2640r2f project over the past few days, production tests require measurement of emission current, reception current, and sleep current. It is best to measure the current according to the method, so that the module is in a specific State (launch, receive, sleep), read the current table data, this measurement method is called solution 1.However, in actual production, we hope to control the module to di

Source: http://www.51testing.com/cgi-bin/viewthread.php? Tid = 5888 fpage = 1 Highlight = % C8 % B1 % CF % DD % B7 % D6 % Ce % F6 Quantitative management is a development trend of project management. For testing, it is very helpful to manage and improve the measurement of testing costs, results and benefits. You cannot manage what you cannot see and understand, and for understanding testing, you must collect and track test process and test validity

LoadRunner interface voltage measurement, request message is in JSON formatFocus on the parameterization of request messages:The request method is as follows:"Follow 1" "EncType=application/json", 　　　//指定响应头的Content-Type，这里是JSON "RecContentType=application/json", 　　//指定请求头的Content-Type，这里是JSON"Attention 2" "Be aware of the parameterization processThe original text of each parameter in the middle of the comma, before and after increasi

Tags: postgrep sql geometry measurement function1. Measuring area st_area (geometry)2, according to the latitude and longitude points to calculate the distance on the earth surface, unit meters, the earth radius value of 6370986 meters st_distance_sphere (point, point)Similarly, using the specified earth ellipsoid parameter st_distance_spheroid (point, Point, spheroid)3. Measuring 2D object length st_length2d (geometry)4. Measuring 3D object length st

The scope discussed in this paper does not include geometry reconstruction, texture reconstruction, but only three-dimensional measurement algorithm based on the existing three-dimensional triangular mesh model (the human triangular grid). In fact, the circumference measurement is a three-dimensional model with a specific plane intersection, and the intersection further analysis of the intersection of the s

How to automatically add units of measurement when Excel enters data When we do data entry in a cell, we often need to add some units. For example, amount per unit yuan, fractional unit element. If the frequent repetition of these units significantly more trouble, in fact, we can use the custom format to implement automatic add units of measurement. Select the cells that you want to automatically add unit

algorithm [4].Finally, we wowould like to mention that although the concept of an algorithm is a very broad one, in this book we restrict ourselves to algorithms designed to be executed on a computer.It is relatively easy to invent algorithms. in practice, however, one wants not only algorithms, one wants good algorithms. thus, the objective is to invent good algorithms and prove that they are good. the "Goodness" of an algorithm can be appraised by

There are many times in the computer field. The first is called CPU time or execution time, which is used to measure the amount of time the CPU spends executing a program. The second is called the Wall clock time, which measures the total time when a program is executed. The wall clock time is also known as elapsed time or elapsed time. The wall clock time is usually longer than the CPU time, because the program that the CPU performs the measurement m

When we do data entry in a cell, we often need to add some units. For example, amount per unit yuan, fractional unit element. If the frequent repetition of these units significantly more trouble, in fact, we can use the custom format to implement automatic add units of measurement. Select the cells that you want to automatically add units of measurement to, and then open the Cells command under the Format

Tag: The extraction algorithm specifies that the relational computes the HTML member model FFFFFFThe scope discussed in this paper does not include geometry reconstruction, texture reconstruction, but only three-dimensional measurement algorithm based on the existing three-dimensional triangular mesh model (the human triangular grid). In fact, the circumference measurement is a three-dimensional model with

been welded in advance, no external connection required). The buzzer picks up the P2.1. 3. Algorithm part By detecting whether the key is pressed or pressed, start detection and then detect if the key is released. At the same time buzzer sound prompts to start detection, to trig feet at least 10us high level signal, the module automatically send 8 40khz square wave, automatic detection of whether there is a signal return, there is a signal return, through the echo foot output a high level, high

http://www.ibm.com/developerworks/cn/linux/l-netperf/ When building or managing a network system, we are more concerned about the availability of the network, that is, whether the network connectivity, but for its overall performance is often not considered, or even consider the problem of performance, but found no appropriate means to test the performance of the network. When we develop a network application, we will find that in the actual use of the network environment, the use of network ap

--oltp-num-tables=10--oltp-table-size=500000--report-interval=10--max-requests=0-- Oltp-test-mode=nontrx--oltp-nontrx-mode=select--oltp-read-only=off--max-time= $time -- num-threads= $thread runecho "======================================================================= ===================================================================== "done>>/tmp/ sysbench.log.100.2In fact, the test time should not be only 3600s, the number of tables and the number of rows is not too large, if you want to g

Highcharts translation series 12: gauge measurement chartDescription Measurement charts require highcharts-more.js support Attribute ParametersDescriptionDefault ValueAnimationAnimationTrueColorMain color or sequence colorNullCursorCursorNullDataLabelsSame as bar, see Level 2 Title datalabelsDialDial, see dialEnableMouseTrackingEnables or disables mouse tracking of a specific sequenceTrueEventsEvent, see Le