performance profiling

BLE-NRF51822 tutorial 3-SDK framework profiling NordicBLE technology exchange group 498676838This section describes the framework and does not involve too much code details. 51822 of the official sdks are actually not framework-resistant. What is a framework? For example, TI's ble sdk has an operating system abstraction layer (OSAL) which is a round training scheduling. You need to create tasks according to their methods. In essence, SDK 51822 only

Keyvaluepairmodelbinderprovider (),New Complexmodeldtomodelbinderprovider (),New Arraymodelbinderprovider (),New Dictionarymodelbinderprovider (),New Collectionmodelbinderprovider (),New Mutableobjectmodelbinderprovider ());SetsingleSetmultipleNew Datamembermodelvalidatorprovider ()); This is a ordered list,so put the most common providers at the top.SetmultipleNew Routedatavalueproviderfactory ()); Modelvalidatorcache Validatorcache = new Modelvalidatorcache (New lazySetsingle Setsing

= This.configuration.getTypeHandlerRegistry (); }At this point, the data source creation ends. Let's take a look at how to use it.Third, detailed1. Mybatis DataSource Structure2. MyBatis JNDIMyBatis Jndi has been analyzed before the source code, which is not analyzed here, the original link: Click to open the link3. MyBatis unpooledMyBatis unpooled The idea of creating a data source, first create a data source factory with the default construction method (at which time unpooled DataSource is c

, which mainly includes:With "*\ r\ nThe form writes count to the Rio object in the format of a string, returning the number of bytes written. size_t Riowritebulkcount (Rio *r, char prefix, int count);//with "$\ r\n\ r\ n"format writes the binary security string to the Rio object. size_t Riowritebulkstring (Rio *r, const char *BUF, size_t len);//with "$\ r\ n\ r\ n"To write a long Long value to the Rio object. size_t Riowritebulklonglong (Rio *r, Long long L);//To "$\ r\n\ r\ n' format writes a

borrowed object entity;}}; int _tmain (INTARGC, _tchar* argv[]) {funcptrfuncp;derive der;//This is simply replacing the parent class object with a derived class object, which is obviously satisfying the "is-a" relationship;//* (FUNCP.PF) (8) ;//Compile error, equivalent to (*PF1) (5);; /(Der.* (DER.PF)) (9);//borrowing class entities to achieve;//der.callfuncptr; other oth1 (1);//define two different object entities so that the same function pointer points to different functions; other oth2 (2)

ratio this function and equal series A bit similar, are dynamic control wide height, different is this function relative control can be itself: The height of the control 6 and the width of its own 1:2 scale, after the simulator runs, the width is twice times higher.6, Align This is mainly used for all kinds of alignmentLeading, trailing, top, bottom, center, Hor, Ver are left-aligned, right-aligned, bottom-aligned, horizontal-center-aligned, vertical-centered, and can be offset by constant.Base

invoke the method provided by WebService as you would call a local class):Error may occur: (Package name and existence path consistent, my resolved)Workaround (, the following package name should be wrong to write cn.com.webxml)1.2.3.4.5.6.7.Test: Packagecn.test;ImportCn.com.webxml.MobileCodeWS;ImportCn.com.webxml.MobileCodeWSSoap; Public classWebServiceTest { Public Static voidMain (string[] args) {mobilecodews ws=Newmobilecodews (); Mobilecodewssoap Soap=Ws.getmobilecodewssoap (); String Info

STL source code profiling algorithm set Set AlgorithmsBytes ------------------------------------------------------------------------------------ Description: Set_union, set_difference, set_intersection, set accepted by set_symmetric_difference algorithm, It must be an ordered interval. It is applicable to set/multiset with RB-tree as the underlying layer and not to hash_set/hash_multiset with hash as the underlying layer. Of course, it is also applic

STL source code profiling algorithm stl_algo.h -- random_shuffle Random_shuffle Certificate -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Description: sorts the elements of [first, last) at random. Ideas: Must be RandomAccessIterator 1. Traverse intervals 2. Generate a random number rand in [0, I) and exchange * (first + rand)

STL source code profiling algorithm stl_algo.h -- pre_permutation Pre_permutation---------------------------------------------------------------- Description: gets the first permutation and combination of the sequence marked by [first, last. If no value exists, false is returned. If yes, true is returned. Ideas: From the back to the front 1. Find two adjacent elements, set the left-side element to * I, and the right-side element to * ii, which meets

STL source code profiling algorithm stl_heap.h Heap------------------------------------------------------------------------- Binary heap is a Complete binary Tree. Implicit representation: tree is expressed in array. Tip: Keep the #0 element of array, and the left and right subnodes of element I are 2i and 2i + 1, respectively, The parent node is I/2 --> STL does not use this trick. Changing the size of an array cannot be changed dynamically. Theref

Process address space for Linux kernel profiling (III) This section describes page missing exception handling programs and heap management.Page missing exception handling program Two scenarios of triggering a page missing exception program: 1. Exceptions caused by programming errors (such as out-of-bounds access, the address does not belong to the process address space ). 2. The address belongs to the linear address space, but the kernel has not alloc

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without first checking. A typical example of the Set method is the Unlock () method in the lock class. A thread holding a lock is always able to unlock successfully without checking that the lock is in an unlocked state.The program flow of the set method is usually as follows: Set internal state Notifies the waiting thread Here is an example of the Unlock () method: Public class lock{ Privatebooleanfalse; Public synchronized void unlock () { false; Notify (

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OnPause method of key activity such as the login window.Of course, the operation industry has specialized, professional things to the professional people to do. Ali Poly Security Products Security Components SDK has security signature, security encryption, secure storage, simulator detection, anti-debugging, anti-injection, anti-activity hijacking and other functions. Developers need to simply integrate the security Components SDK can effectively solve the above login window by Trojan virus hij

OnPause method of key activity such as the login window.Of course, the operation industry has specialized, professional things to the professional people to do. Ali Poly Security Products Security Components SDK has security signature, security encryption, secure storage, simulator detection, anti-debugging, anti-injection, anti-activity hijacking and other functions. Developers need to simply integrate the security Components SDK can effectively solve the above login window by Trojan virus hij

that at this point we match the view parameter is to be in the form of a list or a tuple to get, when the match will be separated by itself, then our final function body is Which???After my thinking, he is namespace, is not a very familiar name, namespace, we know each of the Python variables, each Han Shuming, each column name, is stored in our namespace, through the relationship mapping, wecan find his corresponding value, thus executing our function body, get the final result.Perhaps everyon

Pages_to_scan file defines the number of pages that can be scanned in a given scan. Any user can view these files, but users must have root permissions to modify them.There are also 5 monitored files (all read-only) that are exported via SYSFS, which indicate the operation and effectiveness of the KSMD. The Full_scans file indicates the number of full-zone scans that have been performed. The remaining 4 files indicate KSM's page-level stats:PAGES_SHARED:KSM The number of non-exchangeable kernel

Subtlety: Timebinlog_group_commit_sync_no_delay_count=10-30: Number of transactionsDeferred replicationTo keep a fixed time delay from the library and the main library (Sql_thread)Usage ScenariosUsing delayed replication to perform misoperation recoveryUsing delayed replication to do statistical analysis environment processingStop slave Sql_threadChange Master to Master_delay=n; #N单位是SMulti-source ReplicationMultiple m corresponds to one sScene:Centralized backupData Analysis AggregationShard D