tx2 jetson

First, the overall is in accordance with the group of documents "TK1 Wireless network Connection" step operation, but also encountered some problems, as follows:1. sudo apt-get update and sudo apt-get upgrade error: (Problems after the Ubuntu update

First, the preparatory work 1. Download the latest kernel on the website Source Code : https://developer.nvidia.com/embedded/downloads#?tx= $software, L4T-TX1 2, ubuntu16.04 compilation environment preparation: Download two cross compiler Aarch64

Hardware platform: NVIDIA Jetson TX2 System platform: Ubuntu16.04 LTS Sogou Input Method: 1, Sogou website to download Sogou Input method http://pinyin.sogou.com/linux/ 2, installation, right mouse button installation. 3, reboot, it's okay. Google Pinyin Input Method 1, by instruction: sudo apt-get install Fcitx-googlepinyin 2, set the keyboard input method system to FCITX

isolation level may not provide data-efficient protection when your system's requirements for concurrency control are very stringent, but this isolation level is sufficient for most applications. We use the following experiment to test: First configure the SQL Server 2000 database and attach the Dbapp database. Then set up a management console application in Visual Studio. NET to add the necessary namespace references: Using system;using system.data;using system.data.sqlclient;using system.conf

has strict requirements on concurrency control, this default isolation level may not provide effective data protection, but this isolation level is sufficient for most applications. We use the following experiment for testing: First, configure the SQL Server 2000 database and add the dbapp database. Create a Management Console Application in Visual Studio. NET and add necessary namespace references: using System;using System.Data;using System.Data.SqlClient;using System.Configuration; Then crea

for testing: First, configure the SQL Server 2000 database and add the dbapp database. Create a Management Console Application in Visual Studio. NET and add necessary namespace references: using System;using System.Data;using System.Data.SqlClient;using System.Configuration; Then create two database links and adopt different transaction isolation levels: private static SqlConnection conn1;private static SqlConnection conn2;private static SqlTransaction tx1;private static SqlTransaction

has strict requirements on concurrency control, this default isolation level may not provide effective data protection, but this isolation level is sufficient for most applications. We use the following experiment for testing: First, configure the SQL Server 2000 database and add the dbapp database. Create a Management Console Application in Visual Studio. NET and add necessary namespace references: using System;using System.Data;using System.Data.SqlClient;using System.Configuration; Then crea

issues with reading uncommitted data, but it still cannot avoid repeated reads (including Phantom reads. When your system has strict requirements on concurrency control, this default isolation level may not provide effective data protection, but this isolation level is sufficient for most applications. We use the following experiment for testing: First, configure the SQL Server 2000 database and add the dbapp database. Create a Management Console Application in Visual Studio. NET and add necess

to avoid the problem of non-repeatable reads (including Phantom reads). This default isolation level may not provide data-efficient protection when your system is demanding concurrency control, but this isolation level is sufficient for most applications.We use the following experiment to test:First configure the SQL Server 2000 database, attaching the Dbapp database. Then create a management Console application in Visual Studio. NET and add the necessary namespace references:Using system;using

) { PRINTK ("%S:TX access conflict. irq=%d lock=%d tx1=%d tx2=%d last=%d\n ", Dev->name, Dev->interrupt, Ei_local->irqlock, EI_LOCAL->TX1, EI_LOCAL->TX2, EI_LOCAL->LASTTX); Restore_flags (flags); return 1; } /* Mask interrupts from the Ethercard. */ Outb (0x00, e8390_base + EN0_IMR); Ei_local->irqlock = 1; Restore_flags (flags); Send_length = Eth_zlen if (Ei_local->pingpong

second session reads the first session data session Session2 = Factory.opensession () ; Transaction tx2 = Session2.begintransaction (); Tx2.begin (); User User2 = (user) Session2.get (user.class, 1); System.out.println (User2); Tx2.commit (); Session2.close ();}650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/5A/1E/wKiom1T2uVOQYuqQAAEMb6Y-nJI332.jpg "t

Account = (account) Session1.get (Account.class, New Long (1)); System.out.println ("t1-balance=" + account.getbalance ()); Thread.Sleep (500); Account.setbalance (account.getbalance () + 100); System.out.println ("T1-change balance:" + account.getbalance ()); Tx1.commit (); System.out.println ("T1-commit transaction"); Thread.Sleep (500); catch (Exception e) {e.printstacktrac

typical double-flower detection is presented. Assuming that the A1 address has 10 XDAG,A1 wallet has been maliciously copied two copies, and initiated two transfers, a Tx1 from A1 to 5 Xdag to A2 address, the other Tx2 from A1 to 7 Xdag to A2 address. The two transfers total 12 xdag, exceeding the A1 address original 10 Xdag, is a typical double flower. The logic of the Xdag detection is that when the nodes receive Tx1 and

time difference; Lock objects between multiple threads (sessions) must wait for each other and wait for a ring. Because the LOCK_S lock is applied to SELECT data that meets the conditions, the deadlock probability of insert select in RR mode is undoubtedly higher. I simulated the deadlock result through the test,Strictly speaking, this is the result of two deadlocks in the case of high concurrency of the same statement. Test Environment preparation: mysql> create table b(id int primary key,na

MySQL source code learning: amp; mdash; MDL dictionary lock bitsCN.com What is MDL? MDL, Meta Data lock, metadata lock, usually calledDictionary lock. The dictionary lock corresponds to the data lock. The dictionary lock is used to protect data objects from changes. generally, some DDL statements change the dictionary objects. for example, if two TX and TX1 tables are queried, TX2 tries to DROP them, the dictionary lock will lock

MySQL source code learning-MDL dictionary lock bitsCN.com What is MDL? MDL, Meta Data lock, metadata lock, usually calledDictionary lock. The dictionary lock corresponds to the data lock. The dictionary lock is used to protect data objects from changes. generally, some DDL statements change the dictionary objects. for example, if two TX and TX1 tables are queried, TX2 tries to DROP them, the dictionary lock will lock

[root @ tx3 ~] # Awk-F: '$3 Root Bin (3) logical operators |! And Example [root @ tx3 ~] # Awk-F: '$3> 0 $3 Bin 1 Daemon 2 Example [root @ tx3 ~] # Awk-F: '$3> 10 | $3 Root 0 Bin 1 Daemon 2 Adm 3 Lp 4 Operator 11 (4) Arithmetic Operators +-*/% (Modulus (remainder) ^ (Power Operation) Example: Output name, total score, average score [Root @ tx3 ~] # Cat cj Tx 90 86 86 Tx1 89 78 85 Tx2 79 80 85 [Root @ tx3 ~] # Awk '{print $1, $2 + $3 + $4, (

= "true"> change. This configuration can be done in development for entities that do not frequently change properties Solve the problem:3.2,update an out-of-state object, if there is already an OID Same Persistent state object, then the error3.3,update a de-state object, the database does not have a corresponding record (deleted by another program), also wrong/** Update method * Convert an off-state object to a persistent state*/ /** Question 3: * When we persist a off-state object, if the ob

2. Implement the following code Public classMainactivityextendsappcompatactivity {TextView tx1, tx2; Switch SW; ToggleButton TB; intA, B; @Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate); Setcontentview (R.layout.activity_main); TX1=(TextView) Findviewbyid (R.id.textview); TX2=(TextView) Findviewbyid (R.ID.TEXTVIEW2); SW=(Switch) Findviewbyid (R.

, the program throws Org.hibernate.StaleObjectStateException:Row is updated or deleted by another Transaction (or Unsaved-value mapping was incorrect) exception. There are two things here, too. One is the case of two different transactions Java code @Test publicvoidtesttransation1 () { sessionsession1=null; Sessionsession2= null; try{ Session1=hibernateutil.getsession (); Session2=hibernateutil.getsession (); dirdir1= (Dir) session1.load (dir.class, "4028811a3d3387d3013d3387d4a40008