Glossary

A
Annotation	Annotations are introduced into the Java language with JDK 1.5. They give you the ability to provide additional metadata alongside a Java entity (such as classes, interfaces, and enumerations). Annotations can be declared before packages, classes, fields, methods, local variables, and method parameters to describe and comment on these elements.
AOF	Append-Only File (AOF) is a persistence mechanism used in Redis to log all write commands, such as SET and DEL. It appends all writes to the file and can replay logs to restore data.
B
BiSheng JDK	Based on OpenJDK, the BiSheng JDK is a high-performance OpenJDK release that can be used in production environments. With the accumulation of extensive application scenarios and feedback from Java developers, it addresses various challenges encountered during service running. Additionally, it has been optimized specifically for the Arm architecture.
C
CMakeLists	Configuration file of the software build tool CMake. This configuration file defines the software compilation process.
Compute Unified Device Architecture	Compute Unified Device Architecture (CUDA) introduced by NVIDIA is a general purpose parallel computing platform and programming model that leverages the parallel compute engine in NVIDIA GPUs to solve many complex computational problems in a more efficient way than on a CPU.
CPI	Ratio of CPU cycles/Retired instructions, which indicates the clock cycle consumed by each instruction.
client application	A client application (CA) is an application that works with trusted applications (TAs) in a rich execution environment (REE) and is responsible for external communication.
D
DDR	Double Data Rate (DDR) is a type of memory technology that transfers data on both the rising and falling edges of a clock signal. This doubles the memory bandwidth and increases the speed of data transfer.
Docker	Docker is an open source containerization platform. It enables developers to package applications into containers—standardized executable components that combine application source code with all the OS libraries and dependencies required to run the code in any environment. Containers use the sandbox mechanism, which eliminates interface between containers.
E
eBPF	Extended Berkeley Packet Filter (eBPF) is a kernel technology that lets programs run without need to modify the kernel source code.
F
flame graph	Flame graphs, introduced by Brendan Gregg, are a visualization of hierarchical data, created to visualize stack traces of profiled software so that the most frequent code-paths to be identified quickly and accurately.
G
GCC for openEuler	GCC for openEuler is a high-performance compiler for Kunpeng 920 processors in Linux. It is developed based on open source GCC 10.3. It has optimizations in software and hardware collaboration, and explores the ultimate performance in fields such as OpenMP, Scalable Vector Extension (SVE) vectorization, and math libraries.
glibc	The GNU C Library (glibc) is the GNU Project's implementation of the C standard library.
H
Hypertext Transfer Protocol Secure	Hypertext Transfer Protocol Secure (HTTPS) is an extension of the Hypertext Transfer Protocol (HTTP). It uses encryption for secure communication over a computer network, and is widely used on the Internet.
I
instructions per cycle	Instructions per cycle (IPC) is the average number of instructions executed by a CPU in each clock cycle. It reflects the smoothness of CPU execution. If a four-transmitter Kunpeng 920 processor executes four instructions in each clock cycle when its pipeline operates in full load, the IPC is 4.0. An IPC value closer to 4.0 indicates that the program uses the processor features to a greater extent.
instrumentation	In program development, instrumentation refers to inserting extra logic (such as logging, performance statistics, and debugging information) into code to detect, debug, or analyze program running behavior without changing original functions.
interrupt	A temporary suspension of a process. The computer suspends one activity in case of an exception and starts processing another activity. The computer resumes the interrupted activity after completing the other activity.
J
Java Development Kit	Java Development Kit (JDK) is a software development kit in Java. It is mainly used by Java applications on mobile devices and embedded devices. JDK is the core of Java development. It contains the Java Runtime Environment (JVM + Java system class libraries) and Java tools.
Java Virtual Machine	A virtual machine capable of running Java bytecode, implemented as a stack machine. It is a part of the Java platform and can run software programs written in Java. The JVM has a comprehensive hardware architecture, including processors, stacks, and registers, along with corresponding instruction sets.
K
key	A key is a parameter that is entered when converting plaintext into ciphertext or ciphertext into plaintext. Keys are classified into symmetric keys and asymmetric keys.
M
makefile	Configuration file of the software build tool Make. This configuration file defines the software compilation process.
memory consistency check	A feature of the Kunpeng DevKit Affinity Analyzer. It checks for memory inconsistency issues in C/C++ source code running on the Kunpeng platform and provides check results and suggestions for inserting memory barriers.
N
non-uniform memory access	Non-uniform memory access (NUMA) is a CPU architecture that consists of multiple CPU modules. Each CPU module consists of multiple CPUs (for example, four CPUs) and has its independent local memory and I/O slots. The nodes in the NUMA can be connected and exchange information by using an interconnect module, enabling each CPU to access the memory of the entire system.
P
passphrase	It is used when generating a key.
Perf	perf is a performance profiling tool built in the Linux kernel source code tree. Based on the event sampling principle and performance events, perf analyzes performance metrics related to processors and operating systems. It can be used to locate performance bottlenecks and hotspot code.
PMU event	A group of data provided by the Performance Monitor Unit (PMU) and CPU hardware unit that reflects the performance of a processor.
private key	A private key is the secret key used to encrypt and decrypt messages between communicators. It is a form of symmetric encryption, for the same key is utilized for both encryption and decryption purposes. Private keys must be protected from being obtained by unauthorized agents.
process identifier	A process identifier (PID) is a unique number to identify each process running in an operating system. It is allocated by the operating system when the process is running and does not represent a fixed process.
PS	Parallel Scavenge (PS) is a throughput-first garbage collector for Java programs and has adaptive adjustment policies.
public key	During login to a Linux OS through SSH, an SSH key pair will be generated on the client and uploaded to the target server. Each key pair consists of a public key and a private key. The associated public key can be shared freely without any negative consequences.
PuTTY	PuTTY is a connection tool supporting Telnet, SSH, rlogin, pure TCP, and serial ports.
R
RDB	Redis Database Backup (RDB) is a persistence mechanism used in Redis to periodically generate data snapshots. An RDB file is a binary file that stores the complete data status of Redis at a certain point of time.
Remote Direct Memory Access	Remote Direct Memory Access (RDMA) is a function that enables a computer to directly transmit data to the memory of another computer over a network.
Rivest-Shamir-Adleman	Rivest-Shamir-Adleman (RSA) is an asymmetric cryptographic algorithm.
rollback	Rollback is a return to a prior state by undoing the last operation or a series of operations under a certain condition (for example, a given period of time).
S
SME	Scalable Matrix Extension (SME) introduces a dedicated scalable matrix register based on SVE, enabling more efficient execution of core computations such as matrix multiplication through outer-product operations.
SVE	Scalable Vector Extension (SVE) is a vector-length-agnostic SIMD instruction set that allows the same code to automatically achieve optimal performance on Arm processors with different vector widths.
Secure Shell	Secure Shell (SSH) is set up by the Network Working Group of the Internet Engineering Task Force (IETF). It is an application layer protocol.
sentinel node	Redis Sentinel is a distributed system that monitors the health status of active and passive Redis nodes, and automatically performs a failover when an active node fails. Sentinel nodes use the voting mechanism to elect idle nodes as active nodes, ensuring high availability of the Redis cluster.
serialization	Serialization is the process of translating a data structure or an object state into a format that can be stored (for example, files in secondary storage devices and data buffers in primary storage devices) or transmitted (for example, data streams over computer networks) and reconstructed later (possibly in a different computer environment).
server	A server is a computer program that provides resources and services to another computer program, also known as the client.
SFTP	Secure File Transfer Protocol (SFTP) enables secure and encrypted file transfers between a client and a server.
snapshot	A fast memory read technology based on hardware programming technologies.
SO dependency library	Linux shared object (SO) file, whose name is similar to libname.so.1.1.1.
soft link	A soft link, also called a symbolic link, is a file whose purpose is to point to a file or directory (called the "target") in various file systems by specifying a path thereto.
software development kit	A software development kit (SDK) is a set of software development tools for software engineers to create application software for specific software packages, software frames, hardware platforms, and OSs. Generally, an SDK refers to the SDK used to develop application programs running on Windows. An SDK provides API files for a programming language and may also provide hardware that communicates with an embedded system.
Software porting assessment	A feature of the Kunpeng DevKit Porting Advisor. It analyzes the SO library files in a software package installation path in the x86 environment and checks whether these files are compatible with the Kunpeng platform.
Source code porting	A feature of the Kunpeng DevKit Porting Advisor. It analyzes the portability of software written in C/C++/ASM/Fortran/Go/interpreted languages.
SSL certificate	A Secure Sockets Layer (SSL) certificate is an SSL-compliant digital certificate issued by a trusted root certificate authority.
Statistical Profiling Extensions	Statistical Profiling Extensions (SPE) is a mechanism provided by Arm, which uses random sampling to dynamically analyze programs.
T
Transmission Control Protocol	In Transmission Control Protocol/Internet Protocol (TCP/IP), a protocol used to break down data information into packets and send them over the IP protocol. The packets received via the IP protocol are checked and reassembled into complete information. TCP is a connection-oriented reliable protocol that ensures error-free transmission of information. It corresponds to the transport layer in the ISO/OSI benchmark model.
trusted execution environment	A trusted execution environment (TEE) is a hardware security feature that is isolated from a normal operating system, for example, a rich execution environment (REE).
U
User Datagram Protocol	The User Datagram Protocol (UDP) is a standard TCP/IP protocol that allows an application program on one end to send datagrams to an application program on the other end.
V
virtualization	A technology that virtualizes a physical computer into multiple logical computers, which reside on the same physical computer. The OSs running on these logical computers can be different, and the applications running on these OSs work independently from each other. Therefore, the working efficiency of the physical computer is significantly improved.
W
weak password	A weak password can be easily guessed or cracked.

Parent topic: Appendixes